Runs locally · Zero uploads
PDF Watermark
Diagonal text watermark — all pages or specific ones.
How it works
Stamp DRAFT, CONFIDENTIAL, INTERNAL, or any custom text across every page of a PDF. The watermark is drawn as real PDF text (Helvetica embedded), not a raster overlay, so file size stays small and the result is searchable + accessible.
Verify it yourself. Open DevTools → Network → run a conversion. The only requests you'll see are the page assets — your file never leaves this tab.
FAQ
Can I add an image watermark instead of text?
V1 supports text watermarks only. Image overlays are coming in a future release; for now use a vector-text logo or rasterize an image into a PDF first.
Will the watermark be removable?
It is drawn into the page content stream, so casual users cannot remove it via Acrobat. A determined attacker can extract pages or re-OCR; if you need cryptographic non-removability, use a digital signature instead.
Does this work on every page?
By default, yes. Use the API directly if you need to watermark only specific pages.