Why use this PDF watermark tool?
Marking contracts, quotes, scanned IDs or confidential documents with a watermark helps prevent misuse and reuse. This tool runs entirely in your browser with pdf-lib — your PDF is never uploaded, there is no file size limit, and no copy is left behind.
Upload PDF
Drop a PDF here, or click to choose a file
PDF files only
Text watermark
Logo watermark
Preview (sample page)
Below is how the watermark lays out on a single page — it will be applied to every page of your PDF.
Features
Fully local
Your PDF never leaves your browser — no server, no upload, no file size limit.
Every page
Text and logo watermarks can be combined and applied to every page at once.
Unicode text
Text is rendered in the browser then embedded, so any language works without garbled glyphs.
Why watermark a PDF?
When sending contracts, quotes, scanned IDs or tender documents, a "For X use only" watermark helps prevent your file from being reused or misused. For PDF copies of IDs, passports and bank documents, a watermark is an important step in protecting personal data.
100% local, privacy-safe
Unlike many online PDF services that upload your file to a server, this tool runs entirely in your browser with pdf-lib. Your PDF is never uploaded, stored or sent to any third party — ideal for documents with personal or business-confidential information.
Text and logo watermarks
Use a text watermark, a logo watermark, or both together, each with its own opacity, size and position. The tiled repeat mode staggers the watermark across the whole page to make it hard to crop out.