Stamp a diagonal text watermark across every page of a PDF, right in your browser. Your file is never uploaded — the watermark is applied on your device.
100% private — files are converted in your browser and never uploaded.
Drop a PDF — it loads locally.
Enter the text (e.g. CONFIDENTIAL, DRAFT).
Save the watermarked PDF.
Yes — the text is placed diagonally and semi-transparently across all pages.
No. The conversion runs entirely in your browser using JavaScript — your file never leaves your device, so it's safe even for sensitive documents.
Yes — completely free, no signup, no watermark, and no daily limits.