Watermark PDF

Stamps semi-transparent text across every page — CONFIDENTIAL, DRAFT, your firm's name.

This tool runs entirely in your browser — the file is never uploaded. You can disconnect from the internet after the page loads and it still works.

Drop files here or click to choose

One PDF file

Watermark text

Opacity

Diagonal

Need more than this page can do?

The PDF Toolbox desktop app compresses, redacts with verified removal, OCRs scans, repairs damaged files, converts to PDF/A and handles 500-page documents — all offline, on your machine, with the same promise: nothing ever leaves it.