SmartWatermark

SmartWatermark lets users apply watermarks to large collections of images directly in their web browser, ensuring that no files are uploaded to external servers. It supports JPEG, PNG, WebP, and, with the paid tier, HEIC/HEIF formats, processing batches of hundreds of photos in seconds by leveraging all available CPU cores. Users can choose between text and image watermarks and can preserve or strip EXIF metadata such as camera settings, copyright information, and GPS coordinates with a single click.

The tool is aimed at individuals and professionals who need to protect or brand their photos without relying on cloud services, especially those who handle high‑resolution or Apple‑specific image types. Its offline capability means it continues to work after the page is loaded, even without an internet connection.

SmartWatermark offers a free tier for up to 20 images per batch and a one‑time Pro purchase of $29 that unlocks unlimited batches, native HEIC support, RAW file handling, and automatic smart contrast adjustments. No subscriptions or recurring fees are required.