exif_reader

Dart package to decode EXIF data from TIFF, JPEG, HEIC, AVIF, PNG, WebP, JXL (JPEG XL), ARW, RAW, DNG, CRW, CR3, NRW, NEF, RAF files. Fork of exifdart.

Example

final exif =
    await readExifFromBytes(bytes);

if (exif.warnings.isNotEmpty) {
  print('Warnings:');
  for (final warning in exif.warnings) {
    print('  $warning');
  }
}

if (exif.tags.isEmpty) {
  print('No EXIF information found');
  return;
}

for (final entry in exif.tags.entries) {
  print('${entry.key}: ${entry.value}');
}

Usage

There are 2 ways to read EXIF data:

readExifFromBytes

This reads EXIF from a list of bytes Uint8List.

readExifFromSource

This reads EXIF from a RandomAccessSource. To use this type, you should install the random_access_source package as well.

# Dart
dart pub add random_access_source
# Or Flutter
flutter pub add random_access_source

To create a RandomAccessSource, use the following implementations:

• Use BytesRASource for Uint8List.
  • BytesRASource(Uint8List bytes): creates a BytesRASource from the given bytes.
• Use FileRASource for File (dart:io) and Blob (package:web).
  • await FileRASource.openPath(path): Opens a FileRASource from a file path.
  • await FileRASource.loadFile(file): Loads a FileRASource from a PlatformFile.

ExifData

The result value of both methods above is ExifData.

/// Represents the extracted EXIF data, including tags and warnings.
class ExifData {
  /// The map of tag names to [IfdTag] objects.
  final Map<String, IfdTag> tags;

  /// List of warnings encountered during EXIF extraction.
  final List<String> warnings;
}