diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2be0bd66..0740f2c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - User can now delete a visit by clicking on the delete button in the visit popup.
 - Import failure now throws an internal server error.
 
+## Changed
+
+- Source of imports is now being detected automatically.
+
 
 # [0.30.9] - 2025-08-19
 
diff --git a/app/controllers/api/v1/visits_controller.rb b/app/controllers/api/v1/visits_controller.rb
index d30db35b..248e5ea7 100644
--- a/app/controllers/api/v1/visits_controller.rb
+++ b/app/controllers/api/v1/visits_controller.rb
@@ -12,14 +12,14 @@ class Api::V1::VisitsController < ApiController
 
   def create
     service = Visits::Create.new(current_api_user, visit_params)
-    
-    if service.call
+
+    result = service.call
+
+    if result
       render json: Api::VisitSerializer.new(service.visit).call
     else
-      render json: { 
-        error: 'Failed to create visit', 
-        errors: service.errors 
-      }, status: :unprocessable_entity
+      error_message = service.errors || 'Failed to create visit'
+      render json: { error: error_message }, status: :unprocessable_entity
     end
   end
 
@@ -77,11 +77,11 @@ class Api::V1::VisitsController < ApiController
 
   def destroy
     visit = current_api_user.visits.find(params[:id])
-    
+
     if visit.destroy
       head :no_content
     else
-      render json: { 
+      render json: {
         error: 'Failed to delete visit',
         errors: visit.errors.full_messages
       }, status: :unprocessable_entity
diff --git a/app/controllers/imports_controller.rb b/app/controllers/imports_controller.rb
index 2d7feef1..a0f798ff 100644
--- a/app/controllers/imports_controller.rb
+++ b/app/controllers/imports_controller.rb
@@ -43,8 +43,7 @@ class ImportsController < ApplicationController
     raw_files = Array(files_params).reject(&:blank?)
 
     if raw_files.empty?
-      redirect_to new_import_path, alert: 'No files were selected for upload', status: :unprocessable_entity
-      return
+      redirect_to new_import_path, alert: 'No files were selected for upload', status: :unprocessable_entity and return
     end
 
     created_imports = []
@@ -59,11 +58,11 @@ class ImportsController < ApplicationController
     if created_imports.any?
       redirect_to imports_url,
                   notice: "#{created_imports.size} files are queued to be imported in background",
-                  status: :see_other
+                  status: :see_other and return
     else
       redirect_to new_import_path,
                   alert: 'No valid file references were found. Please upload files using the file selector.',
-                  status: :unprocessable_entity
+                  status: :unprocessable_entity and return
     end
   rescue StandardError => e
     if created_imports.present?
@@ -95,7 +94,7 @@ class ImportsController < ApplicationController
   end
 
   def import_params
-    params.require(:import).permit(:name, :source, files: [])
+    params.require(:import).permit(:name, files: [])
   end
 
   def create_import_from_signed_id(signed_id)
@@ -103,18 +102,29 @@ class ImportsController < ApplicationController
 
     blob = ActiveStorage::Blob.find_signed(signed_id)
 
-    import = current_user.imports.build(
-      name: blob.filename.to_s,
-      source: params[:import][:source]
-    )
-
+    import = current_user.imports.build(name: blob.filename.to_s)
     import.file.attach(blob)
+    import.source = detect_import_source(import.file) if import.source.blank?
 
     import.save!
 
     import
   end
 
+  def detect_import_source(file_attachment)
+    temp_file_path = Imports::SecureFileDownloader.new(file_attachment).download_to_temp_file
+
+    Imports::SourceDetector.new_from_file_header(temp_file_path).detect_source
+  rescue StandardError => e
+    Rails.logger.warn "Failed to auto-detect import source for #{file_attachment.filename}: #{e.message}"
+    nil
+  ensure
+    # Cleanup temp file
+    if temp_file_path && File.exist?(temp_file_path)
+      File.unlink(temp_file_path)
+    end
+  end
+
   def validate_points_limit
     limit_exceeded = PointsLimitExceeded.new(current_user).call
 
diff --git a/app/services/geojson/importer.rb b/app/services/geojson/importer.rb
index 9967cd49..94230047 100644
--- a/app/services/geojson/importer.rb
+++ b/app/services/geojson/importer.rb
@@ -2,19 +2,19 @@
 
 class Geojson::Importer
   include Imports::Broadcaster
+  include Imports::FileLoader
   include PointValidation
 
-  attr_reader :import, :user_id
+  attr_reader :import, :user_id, :file_path
 
-  def initialize(import, user_id)
+  def initialize(import, user_id, file_path = nil)
     @import  = import
     @user_id = user_id
+    @file_path = file_path
   end
 
   def call
-    file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
-    json = Oj.load(file_content)
-
+    json = load_json_data
     data = Geojson::Params.new(json).call
 
     data.each.with_index(1) do |point, index|
diff --git a/app/services/google_maps/phone_takeout_importer.rb b/app/services/google_maps/phone_takeout_importer.rb
index 90f75f72..51cfda5c 100644
--- a/app/services/google_maps/phone_takeout_importer.rb
+++ b/app/services/google_maps/phone_takeout_importer.rb
@@ -2,12 +2,14 @@
 
 class GoogleMaps::PhoneTakeoutImporter
   include Imports::Broadcaster
+  include Imports::FileLoader
 
-  attr_reader :import, :user_id
+  attr_reader :import, :user_id, :file_path
 
-  def initialize(import, user_id)
+  def initialize(import, user_id, file_path = nil)
     @import   = import
     @user_id  = user_id
+    @file_path = file_path
   end
 
   def call
@@ -46,9 +48,7 @@ class GoogleMaps::PhoneTakeoutImporter
     raw_signals       = []
     raw_array         = []
 
-    file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
-
-    json = Oj.load(file_content)
+    json = load_json_data
 
     if json.is_a?(Array)
       raw_array = parse_raw_array(json)
diff --git a/app/services/google_maps/records_storage_importer.rb b/app/services/google_maps/records_storage_importer.rb
index 28c80bc8..f47c15fd 100644
--- a/app/services/google_maps/records_storage_importer.rb
+++ b/app/services/google_maps/records_storage_importer.rb
@@ -4,11 +4,14 @@
 # via the UI, vs the CLI, which uses the `GoogleMaps::RecordsImporter` class.
 
 class GoogleMaps::RecordsStorageImporter
+  include Imports::FileLoader
+  
   BATCH_SIZE = 1000
 
-  def initialize(import, user_id)
+  def initialize(import, user_id, file_path = nil)
     @import = import
     @user = User.find_by(id: user_id)
+    @file_path = file_path
   end
 
   def call
@@ -20,21 +23,16 @@ class GoogleMaps::RecordsStorageImporter
 
   private
 
-  attr_reader :import, :user
+  attr_reader :import, :user, :file_path
 
   def process_file_in_batches
-    file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
-    locations = parse_file(file_content)
+    parsed_file = load_json_data
+    return unless parsed_file.is_a?(Hash) && parsed_file['locations']
+
+    locations = parsed_file['locations']
     process_locations_in_batches(locations) if locations.present?
   end
 
-  def parse_file(file_content)
-    parsed_file = Oj.load(file_content, mode: :compat)
-    return nil unless parsed_file.is_a?(Hash) && parsed_file['locations']
-
-    parsed_file['locations']
-  end
-
   def process_locations_in_batches(locations)
     batch = []
     index = 0
diff --git a/app/services/google_maps/semantic_history_importer.rb b/app/services/google_maps/semantic_history_importer.rb
index ae6209b4..e5eeb0b9 100644
--- a/app/services/google_maps/semantic_history_importer.rb
+++ b/app/services/google_maps/semantic_history_importer.rb
@@ -2,13 +2,15 @@
 
 class GoogleMaps::SemanticHistoryImporter
   include Imports::Broadcaster
+  include Imports::FileLoader
 
   BATCH_SIZE = 1000
-  attr_reader :import, :user_id
+  attr_reader :import, :user_id, :file_path
 
-  def initialize(import, user_id)
+  def initialize(import, user_id, file_path = nil)
     @import = import
     @user_id = user_id
+    @file_path = file_path
     @current_index = 0
   end
 
@@ -61,8 +63,7 @@ class GoogleMaps::SemanticHistoryImporter
   end
 
   def points_data
-    file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
-    json = Oj.load(file_content)
+    json = load_json_data
 
     json['timelineObjects'].flat_map do |timeline_object|
       parse_timeline_object(timeline_object)
diff --git a/app/services/gpx/track_importer.rb b/app/services/gpx/track_importer.rb
index e0207292..2a25cc99 100644
--- a/app/services/gpx/track_importer.rb
+++ b/app/services/gpx/track_importer.rb
@@ -4,16 +4,18 @@ require 'rexml/document'
 
 class Gpx::TrackImporter
   include Imports::Broadcaster
+  include Imports::FileLoader
 
-  attr_reader :import, :user_id
+  attr_reader :import, :user_id, :file_path
 
-  def initialize(import, user_id)
+  def initialize(import, user_id, file_path = nil)
     @import = import
     @user_id = user_id
+    @file_path = file_path
   end
 
   def call
-    file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
+    file_content = load_file_content
     json = Hash.from_xml(file_content)
 
     tracks = json['gpx']['trk']
diff --git a/app/services/imports/create.rb b/app/services/imports/create.rb
index 766c832a..cac5ad34 100644
--- a/app/services/imports/create.rb
+++ b/app/services/imports/create.rb
@@ -14,7 +14,10 @@ class Imports::Create
     import.update!(status: :processing)
     broadcast_status_update
 
-    importer(import.source).new(import, user.id).call
+    temp_file_path = Imports::SecureFileDownloader.new(import.file).download_to_temp_file
+
+    source = import.source.presence || detect_source_from_file(temp_file_path)
+    importer(source).new(import, user.id, temp_file_path).call
 
     schedule_stats_creating(user.id)
     schedule_visit_suggesting(user.id, import)
@@ -27,6 +30,10 @@ class Imports::Create
 
     create_import_failed_notification(import, user, e)
   ensure
+    if temp_file_path && File.exist?(temp_file_path)
+      File.unlink(temp_file_path)
+    end
+
     if import.processing?
       import.update!(status: :completed)
       broadcast_status_update
@@ -81,6 +88,11 @@ class Imports::Create
     ).call
   end
 
+  def detect_source_from_file(temp_file_path)
+    detector = Imports::SourceDetector.new_from_file_header(temp_file_path)
+    detector.detect_source!
+  end
+
   def import_failed_message(import, error)
     if DawarichSettings.self_hosted?
       "Import \"#{import.name}\" failed: #{error.message}, stacktrace: #{error.backtrace.join("\n")}"
diff --git a/app/services/imports/file_loader.rb b/app/services/imports/file_loader.rb
new file mode 100644
index 00000000..b26d4188
--- /dev/null
+++ b/app/services/imports/file_loader.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+module Imports
+  module FileLoader
+    extend ActiveSupport::Concern
+
+    private
+
+    def load_json_data
+      if file_path && File.exist?(file_path)
+        Oj.load_file(file_path, mode: :compat)
+      else
+        file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
+        Oj.load(file_content, mode: :compat)
+      end
+    end
+
+    def load_file_content
+      if file_path && File.exist?(file_path)
+        File.read(file_path)
+      else
+        Imports::SecureFileDownloader.new(import.file).download_with_verification
+      end
+    end
+  end
+end
diff --git a/app/services/imports/secure_file_downloader.rb b/app/services/imports/secure_file_downloader.rb
index f4bd2091..d92e64be 100644
--- a/app/services/imports/secure_file_downloader.rb
+++ b/app/services/imports/secure_file_downloader.rb
@@ -9,6 +9,63 @@ class Imports::SecureFileDownloader
   end
 
   def download_with_verification
+    file_content = download_to_string
+    verify_file_integrity(file_content)
+    file_content
+  end
+
+  def download_to_temp_file
+    retries = 0
+    temp_file = nil
+
+    begin
+      Timeout.timeout(DOWNLOAD_TIMEOUT) do
+        temp_file = create_temp_file
+        
+        # Download directly to temp file
+        storage_attachment.download do |chunk|
+          temp_file.write(chunk)
+        end
+        temp_file.rewind
+
+        # If file is empty, try alternative download method
+        if temp_file.size == 0
+          Rails.logger.warn('No content received from block download, trying alternative method')
+          temp_file.write(storage_attachment.blob.download)
+          temp_file.rewind
+        end
+      end
+    rescue Timeout::Error => e
+      retries += 1
+      if retries <= MAX_RETRIES
+        Rails.logger.warn("Download timeout, attempt #{retries} of #{MAX_RETRIES}")
+        cleanup_temp_file(temp_file)
+        retry
+      else
+        Rails.logger.error("Download failed after #{MAX_RETRIES} attempts")
+        cleanup_temp_file(temp_file)
+        raise
+      end
+    rescue StandardError => e
+      Rails.logger.error("Download error: #{e.message}")
+      cleanup_temp_file(temp_file)
+      raise
+    end
+
+    raise 'Download completed but no content was received' if temp_file.size == 0
+
+    verify_temp_file_integrity(temp_file)
+    temp_file.path
+  ensure
+    # Keep temp file open so it can be read by other processes
+    # Caller is responsible for cleanup
+  end
+
+  private
+
+  attr_reader :storage_attachment
+
+  def download_to_string
     retries = 0
     file_content = nil
 
@@ -51,13 +108,23 @@ class Imports::SecureFileDownloader
 
     raise 'Download completed but no content was received' if file_content.nil? || file_content.empty?
 
-    verify_file_integrity(file_content)
     file_content
   end
 
-  private
+  def create_temp_file
+    extension = File.extname(storage_attachment.filename.to_s)
+    basename = File.basename(storage_attachment.filename.to_s, extension)
+    Tempfile.new(["#{basename}_#{Time.now.to_i}", extension], binmode: true)
+  end
 
-  attr_reader :storage_attachment
+  def cleanup_temp_file(temp_file)
+    return unless temp_file
+
+    temp_file.close unless temp_file.closed?
+    temp_file.unlink if File.exist?(temp_file.path)
+  rescue StandardError => e
+    Rails.logger.warn("Failed to cleanup temp file: #{e.message}")
+  end
 
   def verify_file_integrity(file_content)
     return if file_content.nil? || file_content.empty?
@@ -78,4 +145,26 @@ class Imports::SecureFileDownloader
 
     raise "Checksum mismatch: expected #{expected_checksum}, got #{actual_checksum}"
   end
+
+  def verify_temp_file_integrity(temp_file)
+    return if temp_file.nil? || temp_file.size == 0
+
+    # Verify file size
+    expected_size = storage_attachment.blob.byte_size
+    actual_size = temp_file.size
+
+    if expected_size != actual_size
+      raise "Incomplete download: expected #{expected_size} bytes, got #{actual_size} bytes"
+    end
+
+    # Verify checksum
+    expected_checksum = storage_attachment.blob.checksum
+    temp_file.rewind
+    actual_checksum = Base64.strict_encode64(Digest::MD5.digest(temp_file.read))
+    temp_file.rewind
+
+    return unless expected_checksum != actual_checksum
+
+    raise "Checksum mismatch: expected #{expected_checksum}, got #{actual_checksum}"
+  end
 end
diff --git a/app/services/imports/source_detector.rb b/app/services/imports/source_detector.rb
new file mode 100644
index 00000000..d122892f
--- /dev/null
+++ b/app/services/imports/source_detector.rb
@@ -0,0 +1,235 @@
+# frozen_string_literal: true
+
+class Imports::SourceDetector
+  class UnknownSourceError < StandardError; end
+
+  DETECTION_RULES = {
+    google_semantic_history: {
+      required_keys: ['timelineObjects'],
+      nested_patterns: [
+        ['timelineObjects', 0, 'activitySegment'],
+        ['timelineObjects', 0, 'placeVisit']
+      ]
+    },
+    google_records: {
+      required_keys: ['locations'],
+      nested_patterns: [
+        ['locations', 0, 'latitudeE7'],
+        ['locations', 0, 'longitudeE7']
+      ]
+    },
+    google_phone_takeout: {
+      alternative_patterns: [
+        # Pattern 1: Object with semanticSegments
+        {
+          required_keys: ['semanticSegments'],
+          nested_patterns: [['semanticSegments', 0, 'startTime']]
+        },
+        # Pattern 2: Object with rawSignals
+        {
+          required_keys: ['rawSignals']
+        },
+        # Pattern 3: Array format with visit/activity objects
+        {
+          structure: :array,
+          nested_patterns: [
+            [0, 'visit', 'topCandidate', 'placeLocation'],
+            [0, 'activity']
+          ]
+        }
+      ]
+    },
+    geojson: {
+      required_keys: ['type', 'features'],
+      required_values: { 'type' => 'FeatureCollection' },
+      nested_patterns: [
+        ['features', 0, 'type'],
+        ['features', 0, 'geometry'],
+        ['features', 0, 'properties']
+      ]
+    },
+    owntracks: {
+      structure: :rec_file_lines,
+      line_pattern: /"_type":"location"/
+    }
+  }.freeze
+
+  def initialize(file_content, filename = nil, file_path = nil)
+    @file_content = file_content
+    @filename = filename
+    @file_path = file_path
+  end
+
+  def self.new_from_file_header(file_path)
+    filename = File.basename(file_path)
+    
+    # For detection, read only first 2KB to optimize performance
+    header_content = File.open(file_path, 'rb') { |f| f.read(2048) }
+    
+    new(header_content, filename, file_path)
+  end
+
+  def detect_source
+    return :gpx if gpx_file?
+    return :owntracks if owntracks_file?
+
+    json_data = parse_json
+    return nil unless json_data
+
+    DETECTION_RULES.each do |format, rules|
+      next if format == :owntracks # Already handled above
+
+      if matches_format?(json_data, rules)
+        return format
+      end
+    end
+
+    nil
+  end
+
+  def detect_source!
+    format = detect_source
+    raise UnknownSourceError, 'Unable to detect file format' unless format
+
+    format
+  end
+
+  private
+
+  attr_reader :file_content, :filename, :file_path
+
+  def gpx_file?
+    return false unless filename
+
+    # Must have .gpx extension AND contain GPX XML structure
+    return false unless filename.downcase.end_with?('.gpx')
+    
+    # Check content for GPX structure
+    content_to_check = if file_path && File.exist?(file_path)
+                        # Read first 1KB for GPX detection
+                        File.open(file_path, 'rb') { |f| f.read(1024) }
+                      else
+                        file_content
+                      end
+    
+    content_to_check.strip.start_with?('<?xml') && content_to_check.include?('<gpx')
+  end
+
+  def owntracks_file?
+    return false unless filename
+
+    # Check for .rec extension first (fastest check)
+    return true if filename.downcase.end_with?('.rec')
+    
+    # Check for specific OwnTracks line format in content
+    content_to_check = if file_path && File.exist?(file_path)
+                        # For OwnTracks, read first few lines only
+                        File.open(file_path, 'r') { |f| f.read(2048) }
+                      else
+                        file_content
+                      end
+    
+    content_to_check.lines.any? { |line| line.include?('"_type":"location"') }
+  end
+
+  def parse_json
+    # If we have a file path, use streaming for better memory efficiency
+    if file_path && File.exist?(file_path)
+      Oj.load_file(file_path, mode: :compat)
+    else
+      Oj.load(file_content, mode: :compat)
+    end
+  rescue Oj::ParseError, JSON::ParserError
+    # If full file parsing fails but we have a file path, try with just the header
+    if file_path && file_content.length < 2048
+      begin
+        File.open(file_path, 'rb') do |f|
+          partial_content = f.read(4096) # Try a bit more content
+          Oj.load(partial_content, mode: :compat)
+        end
+      rescue Oj::ParseError, JSON::ParserError
+        nil
+      end
+    else
+      nil
+    end
+  end
+
+  def matches_format?(json_data, rules)
+    # Handle alternative patterns (for google_phone_takeout)
+    if rules[:alternative_patterns]
+      return rules[:alternative_patterns].any? { |pattern| matches_pattern?(json_data, pattern) }
+    end
+
+    matches_pattern?(json_data, rules)
+  end
+
+  def matches_pattern?(json_data, pattern)
+    # Check structure requirements
+    return false unless structure_matches?(json_data, pattern[:structure])
+
+    # Check required keys
+    if pattern[:required_keys]
+      return false unless has_required_keys?(json_data, pattern[:required_keys])
+    end
+
+    # Check required values
+    if pattern[:required_values]
+      return false unless has_required_values?(json_data, pattern[:required_values])
+    end
+
+    # Check nested patterns
+    if pattern[:nested_patterns]
+      return false unless has_nested_patterns?(json_data, pattern[:nested_patterns])
+    end
+
+    true
+  end
+
+  def structure_matches?(json_data, required_structure)
+    case required_structure
+    when :array
+      json_data.is_a?(Array)
+    when nil
+      true # No specific structure required
+    else
+      true # Default to no restriction
+    end
+  end
+
+  def has_required_keys?(json_data, keys)
+    return false unless json_data.is_a?(Hash)
+
+    keys.all? { |key| json_data.key?(key) }
+  end
+
+  def has_required_values?(json_data, values)
+    return false unless json_data.is_a?(Hash)
+
+    values.all? { |key, expected_value| json_data[key] == expected_value }
+  end
+
+  def has_nested_patterns?(json_data, patterns)
+    patterns.any? { |pattern| nested_key_exists?(json_data, pattern) }
+  end
+
+  def nested_key_exists?(data, key_path)
+    current = data
+
+    key_path.each do |key|
+      return false unless current
+
+      if current.is_a?(Array)
+        return false if key >= current.length
+        current = current[key]
+      elsif current.is_a?(Hash)
+        return false unless current.key?(key)
+        current = current[key]
+      else
+        return false
+      end
+    end
+
+    !current.nil?
+  end
+end
diff --git a/app/services/own_tracks/importer.rb b/app/services/own_tracks/importer.rb
index bc63f5f6..70fcf2e4 100644
--- a/app/services/own_tracks/importer.rb
+++ b/app/services/own_tracks/importer.rb
@@ -2,16 +2,18 @@
 
 class OwnTracks::Importer
   include Imports::Broadcaster
+  include Imports::FileLoader
 
-  attr_reader :import, :user_id
+  attr_reader :import, :user_id, :file_path
 
-  def initialize(import, user_id)
+  def initialize(import, user_id, file_path = nil)
     @import = import
     @user_id = user_id
+    @file_path = file_path
   end
 
   def call
-    file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
+    file_content = load_file_content
     parsed_data = OwnTracks::RecParser.new(file_content).call
 
     points_data = parsed_data.map do |point|
diff --git a/app/services/photos/importer.rb b/app/services/photos/importer.rb
index f3ce8fc4..e307b6b1 100644
--- a/app/services/photos/importer.rb
+++ b/app/services/photos/importer.rb
@@ -2,17 +2,18 @@
 
 class Photos::Importer
   include Imports::Broadcaster
+  include Imports::FileLoader
   include PointValidation
-  attr_reader :import, :user_id
+  attr_reader :import, :user_id, :file_path
 
-  def initialize(import, user_id)
+  def initialize(import, user_id, file_path = nil)
     @import = import
     @user_id = user_id
+    @file_path = file_path
   end
 
   def call
-    file_content = Imports::SecureFileDownloader.new(import.file).download_with_verification
-    json = Oj.load(file_content)
+    json = load_json_data
 
     json.each.with_index(1) { |point, index| create_point(point, index) }
   end
diff --git a/app/services/visits/create.rb b/app/services/visits/create.rb
index deef97f6..c2f47310 100644
--- a/app/services/visits/create.rb
+++ b/app/services/visits/create.rb
@@ -8,6 +8,7 @@ module Visits
       @user = user
       @params = params.respond_to?(:with_indifferent_access) ? params.with_indifferent_access : params
       @visit = nil
+      @errors = nil
     end
 
     def call
@@ -15,10 +16,19 @@ module Visits
         place = find_or_create_place
         return false unless place
 
-        create_visit(place)
+        visit = create_visit(place)
+        visit
       end
+    rescue ActiveRecord::RecordInvalid => e
+      ExceptionReporter.call(e, "Failed to create visit: #{e.message}")
+
+      @errors = "Failed to create visit: #{e.message}"
+
+      false
     rescue StandardError => e
-      ExceptionReporter.call(e, 'Failed to create visit')
+      ExceptionReporter.call(e, "Failed to create visit: #{e.message}")
+
+      @errors = "Failed to create visit: #{e.message}"
       false
     end
 
@@ -56,7 +66,7 @@ module Visits
 
       place
     rescue StandardError => e
-      ExceptionReporter.call(e, 'Failed to create place')
+      ExceptionReporter.call(e, "Failed to create place: #{e.message}")
       nil
     end
 
diff --git a/app/views/imports/_form.html.erb b/app/views/imports/_form.html.erb
index 3f2857fb..978baa68 100644
--- a/app/views/imports/_form.html.erb
+++ b/app/views/imports/_form.html.erb
@@ -4,68 +4,6 @@
   direct_upload_user_trial_value: current_user.trial?,
   direct_upload_target: "form"
 } do |form| %>
-  <div class="form-control w-full">
-    <label class="label">
-      <span class="label-text">Select source</span>
-    </label>
-    <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
-      <div class="card bordered shadow-lg p-3 hover:shadow-blue-500/50">
-        <div class="form-control">
-          <label class="label cursor-pointer space-x-3">
-            <%= form.radio_button :source, :google_semantic_history, class: "radio radio-primary" %>
-            <span class="label-text">Google Semantic History</span>
-          </label>
-          <p class="text-sm mt-2">JSON files from your Takeout/Location History/Semantic Location History/YEAR</p>
-        </div>
-      </div>
-      <div class="card bordered shadow-lg p-3 hover:shadow-blue-500/50">
-        <div class="form-control">
-          <label class="label cursor-pointer space-x-3">
-            <%= form.radio_button :source, :google_records, class: "radio radio-primary" %>
-            <span class="label-text">Google Records</span>
-          </label>
-          <p class="text-sm mt-2">The Records.json file from your Google Takeout</p>
-        </div>
-      </div>
-      <div class="card bordered shadow-lg p-3 hover:shadow-blue-500/50">
-        <div class="form-control">
-          <label class="label cursor-pointer space-x-3">
-            <%= form.radio_button :source, :google_phone_takeout, class: "radio radio-primary" %>
-            <span class="label-text">Google Phone Takeout</span>
-          </label>
-          <p class="text-sm mt-2">A JSON file you received after your request for Takeout from your mobile device</p>
-        </div>
-      </div>
-      <div class="card bordered shadow-lg p-3 hover:shadow-blue-500/50">
-        <div class="form-control">
-          <label class="label cursor-pointer space-x-3">
-            <%= form.radio_button :source, :owntracks, class: "radio radio-primary" %>
-            <span class="label-text">Owntracks</span>
-          </label>
-          <p class="text-sm mt-2">A .REC file you could find in your volumes/owntracks-recorder/store/rec/USER/TOPIC directory</p>
-        </div>
-      </div>
-      <div class="card bordered shadow-lg p-3 hover:shadow-blue-500/50">
-        <div class="form-control">
-          <label class="label cursor-pointer space-x-3">
-            <%= form.radio_button :source, :geojson, class: "radio radio-primary" %>
-            <span class="label-text">GeoJSON</span>
-          </label>
-          <p class="text-sm mt-2">A valid GeoJSON file. For example, a file, exported from a Dawarich instance</p>
-        </div>
-      </div>
-      <div class="card bordered shadow-lg p-3 hover:shadow-blue-500/50">
-        <div class="form-control">
-          <label class="label cursor-pointer space-x-3">
-            <%= form.radio_button :source, :gpx, class: "radio radio-primary" %>
-            <span class="label-text">GPX</span>
-          </label>
-          <p class="text-sm mt-2">GPX track file</p>
-        </div>
-      </div>
-    </div>
-  </div>
-
   <label class="form-control w-full max-w-xs my-5">
     <div class="label">
       <span class="label-text">Select one or multiple files</span>
diff --git a/spec/requests/api/v1/visits_spec.rb b/spec/requests/api/v1/visits_spec.rb
index 7b501b48..a250635c 100644
--- a/spec/requests/api/v1/visits_spec.rb
+++ b/spec/requests/api/v1/visits_spec.rb
@@ -139,8 +139,8 @@ RSpec.describe 'Api::V1::Visits', type: :request do
           post '/api/v1/visits', params: missing_name_params, headers: auth_headers
 
           json_response = JSON.parse(response.body)
+
           expect(json_response['error']).to eq('Failed to create visit')
-          expect(json_response['errors']).to include("Name can't be blank")
         end
 
         it 'does not create a visit' do
diff --git a/spec/services/imports/create_spec.rb b/spec/services/imports/create_spec.rb
index 91fc643b..c4a37ed3 100644
--- a/spec/services/imports/create_spec.rb
+++ b/spec/services/imports/create_spec.rb
@@ -17,6 +17,7 @@ RSpec.describe Imports::Create do
 
       it 'sets status to processing at start' do
         service.call
+
         expect(import.reload.status).to eq('processing').or eq('completed')
       end
 
@@ -29,7 +30,7 @@ RSpec.describe Imports::Create do
 
       context 'when import fails' do
         before do
-          allow(OwnTracks::Importer).to receive(:new).with(import, user.id).and_raise(StandardError)
+          allow(OwnTracks::Importer).to receive(:new).with(import, user.id, kind_of(String)).and_raise(StandardError)
         end
 
         it 'sets status to failed' do
@@ -51,7 +52,7 @@ RSpec.describe Imports::Create do
 
       it 'calls the GoogleMaps::SemanticHistoryImporter' do
         expect(GoogleMaps::SemanticHistoryImporter).to \
-          receive(:new).with(import, user.id).and_return(double(call: true))
+          receive(:new).with(import, user.id, kind_of(String)).and_return(double(call: true))
         service.call
       end
 
@@ -62,10 +63,16 @@ RSpec.describe Imports::Create do
 
     context 'when source is google_phone_takeout' do
       let(:import) { create(:import, source: 'google_phone_takeout') }
+      let(:file_path) { Rails.root.join('spec/fixtures/files/google/phone-takeout.json') }
+
+      before do
+        import.file.attach(io: File.open(file_path), filename: 'phone-takeout.json',
+                           content_type: 'application/json')
+      end
 
       it 'calls the GoogleMaps::PhoneTakeoutImporter' do
         expect(GoogleMaps::PhoneTakeoutImporter).to \
-          receive(:new).with(import, user.id).and_return(double(call: true))
+          receive(:new).with(import, user.id, kind_of(String)).and_return(double(call: true))
         service.call
       end
     end
@@ -81,7 +88,7 @@ RSpec.describe Imports::Create do
 
       it 'calls the OwnTracks::Importer' do
         expect(OwnTracks::Importer).to \
-          receive(:new).with(import, user.id).and_return(double(call: true))
+          receive(:new).with(import, user.id, kind_of(String)).and_return(double(call: true))
         service.call
       end
 
@@ -102,7 +109,7 @@ RSpec.describe Imports::Create do
 
       context 'when import fails' do
         before do
-          allow(OwnTracks::Importer).to receive(:new).with(import, user.id).and_raise(StandardError)
+          allow(OwnTracks::Importer).to receive(:new).with(import, user.id, kind_of(String)).and_raise(StandardError)
         end
 
         context 'when self-hosted' do
@@ -153,37 +160,55 @@ RSpec.describe Imports::Create do
 
       it 'calls the Gpx::TrackImporter' do
         expect(Gpx::TrackImporter).to \
-          receive(:new).with(import, user.id).and_return(double(call: true))
+          receive(:new).with(import, user.id, kind_of(String)).and_return(double(call: true))
         service.call
       end
     end
 
     context 'when source is geojson' do
       let(:import) { create(:import, source: 'geojson') }
+      let(:file_path) { Rails.root.join('spec/fixtures/files/geojson/export.json') }
+
+      before do
+        import.file.attach(io: File.open(file_path), filename: 'export.json',
+                           content_type: 'application/json')
+      end
 
       it 'calls the Geojson::Importer' do
         expect(Geojson::Importer).to \
-          receive(:new).with(import, user.id).and_return(double(call: true))
+          receive(:new).with(import, user.id, kind_of(String)).and_return(double(call: true))
         service.call
       end
     end
 
     context 'when source is immich_api' do
       let(:import) { create(:import, source: 'immich_api') }
+      let(:file_path) { Rails.root.join('spec/fixtures/files/immich/geodata.json') }
+
+      before do
+        import.file.attach(io: File.open(file_path), filename: 'geodata.json',
+                           content_type: 'application/json')
+      end
 
       it 'calls the Photos::Importer' do
         expect(Photos::Importer).to \
-          receive(:new).with(import, user.id).and_return(double(call: true))
+          receive(:new).with(import, user.id, kind_of(String)).and_return(double(call: true))
         service.call
       end
     end
 
     context 'when source is photoprism_api' do
       let(:import) { create(:import, source: 'photoprism_api') }
+      let(:file_path) { Rails.root.join('spec/fixtures/files/immich/geodata.json') }
+
+      before do
+        import.file.attach(io: File.open(file_path), filename: 'geodata.json',
+                           content_type: 'application/json')
+      end
 
       it 'calls the Photos::Importer' do
         expect(Photos::Importer).to \
-          receive(:new).with(import, user.id).and_return(double(call: true))
+          receive(:new).with(import, user.id, kind_of(String)).and_return(double(call: true))
         service.call
       end
     end
diff --git a/spec/services/imports/source_detector_spec.rb b/spec/services/imports/source_detector_spec.rb
new file mode 100644
index 00000000..97062a21
--- /dev/null
+++ b/spec/services/imports/source_detector_spec.rb
@@ -0,0 +1,174 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Imports::SourceDetector do
+  let(:detector) { described_class.new(file_content, filename) }
+  let(:filename) { nil }
+
+  describe '#detect_source' do
+    context 'with Google Semantic History format' do
+      let(:file_content) { file_fixture('google/semantic_history.json').read }
+
+      it 'detects google_semantic_history format' do
+        expect(detector.detect_source).to eq(:google_semantic_history)
+      end
+    end
+
+    context 'with Google Records format' do
+      let(:file_content) { file_fixture('google/records.json').read }
+
+      it 'detects google_records format' do
+        expect(detector.detect_source).to eq(:google_records)
+      end
+    end
+
+    context 'with Google Phone Takeout format' do
+      let(:file_content) { file_fixture('google/phone-takeout.json').read }
+
+      it 'detects google_phone_takeout format' do
+        expect(detector.detect_source).to eq(:google_phone_takeout)
+      end
+    end
+
+    context 'with Google Phone Takeout array format' do
+      let(:file_content) { file_fixture('google/location-history.json').read }
+
+      it 'detects google_phone_takeout format' do
+        expect(detector.detect_source).to eq(:google_phone_takeout)
+      end
+    end
+
+    context 'with GeoJSON format' do
+      let(:file_content) { file_fixture('geojson/export.json').read }
+
+      it 'detects geojson format' do
+        expect(detector.detect_source).to eq(:geojson)
+      end
+    end
+
+    context 'with OwnTracks REC file' do
+      let(:file_content) { file_fixture('owntracks/2024-03.rec').read }
+      let(:filename) { 'test.rec' }
+
+      it 'detects owntracks format' do
+        expect(detector.detect_source).to eq(:owntracks)
+      end
+    end
+
+    context 'with OwnTracks content without .rec extension' do
+      let(:file_content) { '{"_type":"location","lat":52.225,"lon":13.332}' }
+      let(:filename) { 'test.json' }
+
+      it 'detects owntracks format based on content' do
+        expect(detector.detect_source).to eq(:owntracks)
+      end
+    end
+
+    context 'with GPX file' do
+      let(:file_content) { file_fixture('gpx/gpx_track_single_segment.gpx').read }
+      let(:filename) { 'test.gpx' }
+
+      it 'detects gpx format' do
+        expect(detector.detect_source).to eq(:gpx)
+      end
+    end
+
+    context 'with invalid JSON' do
+      let(:file_content) { 'invalid json content' }
+
+      it 'returns nil for invalid JSON' do
+        expect(detector.detect_source).to be_nil
+      end
+    end
+
+    context 'with unknown JSON format' do
+      let(:file_content) { '{"unknown": "format", "data": []}' }
+
+      it 'returns nil for unknown format' do
+        expect(detector.detect_source).to be_nil
+      end
+    end
+
+    context 'with empty content' do
+      let(:file_content) { '' }
+
+      it 'returns nil for empty content' do
+        expect(detector.detect_source).to be_nil
+      end
+    end
+  end
+
+  describe '#detect_source!' do
+    context 'with valid format' do
+      let(:file_content) { file_fixture('google/records.json').read }
+
+      it 'returns the detected format' do
+        expect(detector.detect_source!).to eq(:google_records)
+      end
+    end
+
+    context 'with unknown format' do
+      let(:file_content) { '{"unknown": "format"}' }
+
+      it 'raises UnknownSourceError' do
+        expect { detector.detect_source! }.to raise_error(
+          Imports::SourceDetector::UnknownSourceError,
+          'Unable to detect file format'
+        )
+      end
+    end
+  end
+
+  describe '.new_from_file_header' do
+    context 'with Google Records file' do
+      let(:fixture_path) { file_fixture('google/records.json').to_s }
+
+      it 'detects source correctly from file path' do
+        detector = described_class.new_from_file_header(fixture_path)
+        expect(detector.detect_source).to eq(:google_records)
+      end
+
+      it 'can detect source efficiently from file' do
+        detector = described_class.new_from_file_header(fixture_path)
+        
+        # Verify it can detect correctly using file-based approach
+        expect(detector.detect_source).to eq(:google_records)
+      end
+    end
+
+    context 'with GeoJSON file' do
+      let(:fixture_path) { file_fixture('geojson/export.json').to_s }
+
+      it 'detects source correctly from file path' do
+        detector = described_class.new_from_file_header(fixture_path)
+        expect(detector.detect_source).to eq(:geojson)
+      end
+    end
+  end
+
+  describe 'detection accuracy with real fixture files' do
+    shared_examples 'detects format correctly' do |expected_format, fixture_path|
+      it "detects #{expected_format} format for #{fixture_path}" do
+        file_content = file_fixture(fixture_path).read
+        filename = File.basename(fixture_path)
+        detector = described_class.new(file_content, filename)
+
+        expect(detector.detect_source).to eq(expected_format)
+      end
+    end
+
+    # Test various Google Semantic History variations
+    include_examples 'detects format correctly', :google_semantic_history, 'google/location-history/with_activitySegment_with_startLocation.json'
+    include_examples 'detects format correctly', :google_semantic_history, 'google/location-history/with_placeVisit_with_location_with_coordinates.json'
+
+    # Test GeoJSON variations
+    include_examples 'detects format correctly', :geojson, 'geojson/export_same_points.json'
+    include_examples 'detects format correctly', :geojson, 'geojson/gpslogger_example.json'
+
+    # Test GPX files
+    include_examples 'detects format correctly', :gpx, 'gpx/arc_example.gpx'
+    include_examples 'detects format correctly', :gpx, 'gpx/garmin_example.gpx'
+    include_examples 'detects format correctly', :gpx, 'gpx/gpx_track_multiple_segments.gpx'
+  end
+end