PDF Watermark Tool — Add Watermarks to PDF Online Free
100% local processing — your images never leave your browser.
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. See our guide on watermarking contracts and proposals without uploading them for a step-by-step walkthrough and a comparison with Smallpdf, Adobe Acrobat and DeftPDF.
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.
Frequently asked questions
Is my PDF uploaded to a server?
No. All processing runs in your browser with pdf-lib. Your PDF is never uploaded, stored or sent to any third party.
Does the watermark apply to every page?
Yes. Your text or logo watermark is automatically applied to every page of the PDF.
Can I use text and a logo at the same time?
Yes. You can enable text and logo watermarks together, each with its own opacity, size and position.
All Tools
10+ privacy-first image tools — all run 100% in your browser
Watermark
Add text or logo watermarks to IDs & docs
Batch Watermark
Watermark many images at once
Mosaic & Blur
Mosaic, blur or box out sensitive parts
EXIF Cleaner
Strip GPS location & camera metadata
Compress
Shrink file size while keeping quality
Convert
Convert between JPG, PNG & WebP
Resize
Resize image width & height
AI Remove BG
Remove image backgrounds with AI
Social Crop
Crop to sizes for every social platform