PDF Watermark
Upload a PDF and type a watermark text (e.g. "CONFIDENTIAL" or "DRAFT") to tile it diagonally across every page, then flatten the result into image-only pages so the watermark can't be stripped by deleting a text layer.
The result is automatically flattened to an image-only PDF, so the watermark can't be removed. This means the text of the original PDF is no longer selectable or searchable, by design.
Pourquoi utiliser cet outil ?
A watermark added as removable text or a simple overlay can often be deleted with basic PDF editing tools. This tool tiles your watermark text diagonally across every page, then rasterizes the whole page into a single flat image (same as our PDF Flattener) — the watermark becomes part of the page itself, not a separate layer that can be lifted out. Everything happens in your browser: your file is never uploaded.
Why it's free
A discreet ad banner covers hosting costs — that's the whole business model. No account to create, no usage limit, no paid tier unlocking the real result. Calculations run in your browser, so your numbers, dates and text never leave your device.
How our tools work