diff --git a/features/video-studio/packages/media-gallery/backend-api/src/modules/processing/processing.controller.ts b/features/video-studio/packages/media-gallery/backend-api/src/modules/processing/processing.controller.ts
new file mode 100644
index 000000000..c3ca2a0a9
--- /dev/null
+++ b/features/video-studio/packages/media-gallery/backend-api/src/modules/processing/processing.controller.ts
@@ -0,0 +1,75 @@
+import { Controller, Post, HttpCode, HttpStatus } from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
+import { InjectQueue } from '@nestjs/bullmq';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Queue } from 'bullmq';
+import { IsNull, Not, Repository } from 'typeorm';
+
+import { createLogger } from '@/common';
+import { PhotoEntity } from '@/entities';
+
+const BACKFILL_BATCH_SIZE = 50;
+
+@ApiTags('processing')
+@Controller('api/admin/processing')
+export class ProcessingController {
+  private readonly logger = createLogger(ProcessingController.name);
+
+  constructor(
+    @InjectRepository(PhotoEntity)
+    private readonly photoRepository: Repository<PhotoEntity>,
+    @InjectQueue('thumbnail-processing')
+    private readonly thumbnailQueue: Queue,
+  ) {}
+
+  @Post('backfill')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Enqueue all pending photos for thumbnail generation' })
+  @ApiResponse({
+    status: 200,
+    schema: { type: 'object', properties: { enqueued: { type: 'number' } } },
+  })
+  async backfill(): Promise<{ enqueued: number }> {
+    let enqueued = 0;
+    let offset = 0;
+
+    this.logger.logWithData('info', 'Starting processing backfill');
+
+    for (;;) {
+      const batch = await this.photoRepository.find({
+        where: {
+          processingStatus: 'pending',
+          storageKey: Not(IsNull()),
+        },
+        select: ['id', 'storageKey', 'mimeType', 'width', 'height'],
+        take: BACKFILL_BATCH_SIZE,
+        skip: offset,
+        order: { id: 'ASC' },
+      });
+
+      if (batch.length === 0) break;
+
+      const jobs = batch.map((photo) => ({
+        name: 'process',
+        data: {
+          photoId: photo.id,
+          storageKey: photo.storageKey!,
+          mimeType: photo.mimeType ?? 'image/jpeg',
+          width: photo.width ?? 0,
+          height: photo.height ?? 0,
+        },
+      }));
+
+      await this.thumbnailQueue.addBulk(jobs);
+      enqueued += batch.length;
+      offset += batch.length;
+
+      this.logger.logWithData('info', 'Enqueued processing batch', { batchSize: batch.length, totalEnqueued: enqueued });
+
+      if (batch.length < BACKFILL_BATCH_SIZE) break;
+    }
+
+    this.logger.logWithData('info', 'Processing backfill complete', { enqueued });
+    return { enqueued };
+  }
+}
diff --git a/features/video-studio/packages/media-gallery/backend-api/src/modules/processing/processing.module.ts b/features/video-studio/packages/media-gallery/backend-api/src/modules/processing/processing.module.ts
index baa985646..715d8fd16 100644
--- a/features/video-studio/packages/media-gallery/backend-api/src/modules/processing/processing.module.ts
+++ b/features/video-studio/packages/media-gallery/backend-api/src/modules/processing/processing.module.ts
@@ -2,7 +2,7 @@ import { BullModule } from '@nestjs/bullmq';
 import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 
-
+import { ProcessingController } from './processing.controller';
 import { ThumbnailProcessor } from './thumbnail.processor';
 
 import { MinioModule } from '@/common/minio';
@@ -21,6 +21,7 @@ import { PhotoEntity } from '@/entities';
       defaultBucket: 'media-gallery',
     }),
   ],
+  controllers: [ProcessingController],
   providers: [ThumbnailProcessor],
   exports: [ThumbnailProcessor],
 })