diff --git a/lib/src/model/product_image.dart b/lib/src/model/product_image.dart
index 6fad432448..043742aee7 100644
--- a/lib/src/model/product_image.dart
+++ b/lib/src/model/product_image.dart
@@ -130,6 +130,7 @@ class ProductImage {
     required String this.imgid,
     this.width,
     this.height,
+    this.uploaded,
   })  : language = null,
         field = null;
 
@@ -138,6 +139,9 @@ class ProductImage {
   final OpenFoodFactsLanguage? language;
   String? url;
 
+  /// Upload timestamp, for uploaded images only, in seconds since Unix Epoch.
+  DateTime? uploaded;
+
   /// Revision number
   int? rev;
 
@@ -232,6 +236,7 @@ class ProductImage {
       '${language == null ? '' : ',language=${language.code}'}'
       '${angle == null ? '' : ',angle=${angle!.degreesClockwise}'}'
       '${url == null ? '' : ',url=$url'}'
+      '${uploaded == null ? '' : ',uploaded=$uploaded'}'
       '${imgid == null ? '' : ',imgid=$imgid'}'
       '${rev == null ? '' : ',rev=$rev'}'
       '${coordinatesImageSize == null ? '' : ',coordinatesImageSize=$coordinatesImageSize'}'
@@ -262,6 +267,7 @@ class ProductImage {
         other.size == size &&
         other.language == language &&
         other.url == url &&
+        other.uploaded == uploaded &&
         other.rev == rev &&
         other.imgid == imgid &&
         other.angle == angle &&
diff --git a/lib/src/utils/json_helper.dart b/lib/src/utils/json_helper.dart
index 67641a54e1..f1ba5ae841 100644
--- a/lib/src/utils/json_helper.dart
+++ b/lib/src/utils/json_helper.dart
@@ -87,6 +87,25 @@ class JsonHelper {
         onlyMain: true,
       );
 
+  // only for main images
+  static const String _ALL_IMAGES_TAG_REVISION = 'rev';
+  static const String _ALL_IMAGES_TAG_ANGLE = 'angle';
+  static const String _ALL_IMAGES_TAG_COORDINATES = 'coordinates_image_size';
+  static const String _ALL_IMAGES_TAG_X1 = 'x1';
+  static const String _ALL_IMAGES_TAG_Y1 = 'y1';
+  static const String _ALL_IMAGES_TAG_X2 = 'x2';
+  static const String _ALL_IMAGES_TAG_Y2 = 'y2';
+
+  // only for raw images
+  static const String _ALL_IMAGES_TAG_UPLOADED = 'uploaded_t';
+
+  // common to main and raw images
+  static const String _ALL_IMAGES_TAG_IMAGE_ID = 'imgid';
+  static const String _ALL_IMAGES_TAG_WIDTH = 'w';
+  static const String _ALL_IMAGES_TAG_HEIGHT = 'h';
+  static const String _ALL_IMAGES_TAG_SIZES = 'sizes';
+  static const String _ALL_IMAGES_TAG_URL = 'url';
+
   /// Returns [ProductImage]s from a JSON map for "Images".
   static List<ProductImage>? allImagesFromJson(
     Map? json, {
@@ -126,12 +145,15 @@ class JsonHelper {
       final Map<String, dynamic> fieldObject = json[key];
 
       // get the sizes object
-      var sizesObject = fieldObject['sizes'] as Map<String, dynamic>?;
+      final Map<String, dynamic>? sizesObject =
+          fieldObject[_ALL_IMAGES_TAG_SIZES] as Map<String, dynamic>?;
       if (sizesObject == null) {
         continue;
       }
 
       if (imageId != null) {
+        final DateTime? uploaded =
+            timestampToDate(fieldObject[_ALL_IMAGES_TAG_UPLOADED]);
         // get each number object (e.g. 200)
         for (var size in ImageSize.values) {
           var number = size.number;
@@ -143,26 +165,28 @@ class JsonHelper {
             ProductImage.raw(
               size: size,
               imgid: imageId.toString(),
-              width: JsonObject.parseInt(numberObject['w']),
-              height: JsonObject.parseInt(numberObject['h']),
-              url: numberObject['url'],
+              width: JsonObject.parseInt(numberObject[_ALL_IMAGES_TAG_WIDTH]),
+              height: JsonObject.parseInt(numberObject[_ALL_IMAGES_TAG_HEIGHT]),
+              url: numberObject[_ALL_IMAGES_TAG_URL],
+              uploaded: uploaded,
             ),
           );
         }
         continue;
       }
 
-      final rev = JsonObject.parseInt(fieldObject['rev']);
-      final String imgid = fieldObject['imgid'].toString();
+      final int? rev =
+          JsonObject.parseInt(fieldObject[_ALL_IMAGES_TAG_REVISION]);
+      final String imgid = fieldObject[_ALL_IMAGES_TAG_IMAGE_ID].toString();
       final ImageAngle? angle = ImageAngleExtension.fromInt(
-        JsonObject.parseInt(fieldObject['angle']),
+        JsonObject.parseInt(fieldObject[_ALL_IMAGES_TAG_ANGLE]),
       );
       final String? coordinatesImageSize =
-          fieldObject['coordinates_image_size']?.toString();
-      final int? x1 = JsonObject.parseInt(fieldObject['x1']);
-      final int? y1 = JsonObject.parseInt(fieldObject['y1']);
-      final int? x2 = JsonObject.parseInt(fieldObject['x2']);
-      final int? y2 = JsonObject.parseInt(fieldObject['y2']);
+          fieldObject[_ALL_IMAGES_TAG_COORDINATES]?.toString();
+      final int? x1 = JsonObject.parseInt(fieldObject[_ALL_IMAGES_TAG_X1]);
+      final int? y1 = JsonObject.parseInt(fieldObject[_ALL_IMAGES_TAG_Y1]);
+      final int? x2 = JsonObject.parseInt(fieldObject[_ALL_IMAGES_TAG_X2]);
+      final int? y2 = JsonObject.parseInt(fieldObject[_ALL_IMAGES_TAG_Y2]);
 
       // get each number object (e.g. 200)
       for (var size in ImageSize.values) {
@@ -171,9 +195,11 @@ class JsonHelper {
         if (numberObject == null) {
           continue;
         }
-        final int? width = JsonObject.parseInt(numberObject['w']);
-        final int? height = JsonObject.parseInt(numberObject['h']);
-        final String? url = numberObject['url'];
+        final int? width =
+            JsonObject.parseInt(numberObject[_ALL_IMAGES_TAG_WIDTH]);
+        final int? height =
+            JsonObject.parseInt(numberObject[_ALL_IMAGES_TAG_HEIGHT]);
+        final String? url = numberObject[_ALL_IMAGES_TAG_URL];
 
         var image = ProductImage(
           field: field!,
@@ -244,7 +270,7 @@ class JsonHelper {
         continue;
       }
       final Map<String, dynamic> item = <String, dynamic>{};
-      item['sizes'] = <String, Map<String, Object>>{};
+      item[_ALL_IMAGES_TAG_SIZES] = <String, Map<String, Object>>{};
       bool first = true;
       for (final ProductImage productImage in list) {
         if (productImage.size == null) {
@@ -252,42 +278,48 @@ class JsonHelper {
         }
         final Map<String, Object> size = <String, Object>{};
         if (productImage.width != null) {
-          size['w'] = productImage.width!;
+          size[_ALL_IMAGES_TAG_WIDTH] = productImage.width!;
         }
         if (productImage.height != null) {
-          size['h'] = productImage.height!;
+          size[_ALL_IMAGES_TAG_HEIGHT] = productImage.height!;
         }
         if (productImage.url != null) {
-          size['url'] = productImage.url!;
+          size[_ALL_IMAGES_TAG_URL] = productImage.url!;
         }
-        item['sizes']![productImage.size!.number] = size;
+        item[_ALL_IMAGES_TAG_SIZES]![productImage.size!.number] = size;
         if (first) {
           first = false;
-          if (productImage.isMain) {
+          if (!productImage.isMain) {
+            if (productImage.uploaded != null) {
+              item[_ALL_IMAGES_TAG_UPLOADED] =
+                  dateToTimestamp(productImage.uploaded);
+            }
+          } else {
             if (productImage.rev != null) {
-              item['rev'] = productImage.rev.toString();
+              item[_ALL_IMAGES_TAG_REVISION] = productImage.rev.toString();
             }
             if (productImage.imgid != null) {
-              item['imgid'] = productImage.imgid!;
+              item[_ALL_IMAGES_TAG_IMAGE_ID] = productImage.imgid!;
             }
             if (productImage.angle != null) {
-              item['angle'] = productImage.angle!.degree.toString();
+              item[_ALL_IMAGES_TAG_ANGLE] =
+                  productImage.angle!.degree.toString();
             }
             if (productImage.coordinatesImageSize != null) {
-              item['coordinates_image_size'] =
+              item[_ALL_IMAGES_TAG_COORDINATES] =
                   productImage.coordinatesImageSize!;
             }
             if (productImage.x1 != null) {
-              item['x1'] = productImage.x1!;
+              item[_ALL_IMAGES_TAG_X1] = productImage.x1!;
             }
             if (productImage.y1 != null) {
-              item['y1'] = productImage.y1!;
+              item[_ALL_IMAGES_TAG_Y1] = productImage.y1!;
             }
             if (productImage.x2 != null) {
-              item['x2'] = productImage.x2!;
+              item[_ALL_IMAGES_TAG_X2] = productImage.x2!;
             }
             if (productImage.y2 != null) {
-              item['y2'] = productImage.y2!;
+              item[_ALL_IMAGES_TAG_Y2] = productImage.y2!;
             }
           }
         }
diff --git a/test/api_json_to_from_test.dart b/test/api_json_to_from_test.dart
index 02ddd7b1cf..3c18bb56b2 100644
--- a/test/api_json_to_from_test.dart
+++ b/test/api_json_to_from_test.dart
@@ -37,6 +37,7 @@ void main() {
           for (final ProductImage productImage2 in imagesBackAndForth) {
             if (productImage1 == productImage2) {
               count++;
+              expect(productImage1.toString(), productImage2.toString());
             }
           }
           expect(count, 1);
@@ -61,6 +62,7 @@ void main() {
       for (final ProductImage productImage
           in productResult.product!.getMainImages()!) {
         expect(productImage.isMain, true);
+        expect(productImage.uploaded, isNull);
         count++;
       }
       expect(count, countMain);
@@ -69,6 +71,7 @@ void main() {
       for (final ProductImage productImage
           in productResult.product!.getRawImages()!) {
         expect(productImage.isMain, false);
+        expect(productImage.uploaded, isNotNull);
         count++;
       }
       expect(count, countRaw);