Watermark PDF
Add a text watermark to every page. 100% in your browser — your file never leaves your device.
100% in your browser — your file never leaves your deviceFiles are processed on your device only. We never upload or store them. Some conversions (Office, OCR, encryption) are best-effort and may not preserve full layout.
How it works & privacy
Add a text watermark to every page. 100% in your browser — your file never leaves your device. The whole job runs in your browser with pdf-lib / pdf.js. Nothing is sent to a server, so your document stays private.
FAQ
Is my file uploaded?
No. The file is read into your browser’s memory and processed there. It is never transmitted.
Which formats are fully supported?
Merge, split, rotate, delete, extract, page numbers, watermark, crop, metadata, image↔PDF and PDF→text/JPG/PNG are fully in-browser. Word/Excel/PPT, OCR and encryption are limited or best-effort.
Is there a size limit?
Very large files run in your browser’s memory, so very big PDFs may be slow. For most documents it is instant.