Add a watermark to multiple images
Upload your logo or watermark raster, position and resize it visually, then apply it to up to 20 PNG, JPG or WebP images.
Batch-process images without uploading them
Download the complete Apple silicon image toolkit. It processes files locally, works without internet access and checks for signed updates from Internet Analysis.
- No account or cloud upload
- Batch processing for up to 20 images
- Cryptographically signed updates
Batch add a watermark to photos in your browser
Set the watermark once and the same relative size and position will be used across the complete batch, even when source image dimensions differ. Transparent PNG or WebP watermarks produce the cleanest result.
How to apply one watermark across a batch
- Add a PNG, JPG or WebP logo or watermark raster. Transparent PNG/WebP is useful for overlays.
- Add up to 20 source images, then position and resize the overlay in the preview.
- Apply the watermark, review different image orientations, and download the batch ZIP.
Processing uses browser canvas on this device; source photos are not uploaded by the processing flow. Relative placement can look different across aspect ratios, so inspect every output. A visible watermark does not establish ownership, prevent copying or remove an existing watermark.
Prepare consistent output sizes with the batch image resizer or export privacy-focused copies with the EXIF metadata remover. Keep originals; re-encoding may change quality and source metadata.