The text is drawn into the picture itself, so it cannot be switched off like a layer or a caption. Its size follows the shorter side of each photo, which keeps the mark in proportion on big and small images alike. Opacity lets the photo show through, and the soft shadow keeps light text readable on bright areas.

Copies of identity documents are asked for everywhere: landlords, employers, hotels, banks and courier services. A copy without a mark can be reused for something else. Writing the purpose and date across it, such as "Copy for flat rental, May 2026 only", makes a reused copy easy to spot. The repeating pattern places that line in rows over the whole scan, so a crop cannot remove it.

For photos you sell or share publicly, a small name in a corner is usually enough and spoils the picture less. Set the text size low, the opacity around 40 to 60 percent and choose the corner with the least detail. A centred or repeating mark is stronger for proofs that a client should not use before paying.

Watermarking is often the last step. Turn a sideways photo first with Rotate Image, trim it with Crop Image and set the size with Resize Image. To mark pages in a document instead, use Watermark PDF, and Compress Image to KB helps when the marked scan must stay under an upload limit.

The mark is drawn in your browser. The images are processed on your device and never leave it, which is what you want for passport and licence scans. The tool is free for personal use, takes up to 20 images in one task and needs no account.