JustilityImage watermark tool
Add a text or local-logo watermark with position and opacity controls.
Processed on your device. Your files are never uploaded by Justility.
How privacy worksHow it works
Choose an image and watermark, set placement, then export.
Supported formats
Static raster images and a local PNG/JPEG/WebP logo.
Good to know
Watermarks deter casual reuse; they do not prove ownership.
EXIF orientation is applied. Re-encoding may remove metadata and change color rendering. JPEG uses the selected solid background for transparency. Safety limits: 20 MB per image, 24 megapixels, and 8,192 px per side.
Using image watermark tool
Choose an image and watermark, set placement, then export.
Watermarks deter casual reuse; they do not prove ownership.
Common questions
Are my inputs uploaded?
Justility processes this tool’s inputs locally and does not send them to a processing server. Public application assets are downloaded separately.
Can I use this without an internet connection?
Yes, after you prepare the relevant tool group from Offline help and the browser retains their assets. Installation is optional. All processing dependencies are bundled locally.