Add a Watermark to a PDF — Free & Private
Stamp a text or image watermark across your PDF pages — right in your browser. Your file never leaves your device, and there are no sign-ups.
Drop PDF here or click to browse
PDF files only
Your file never leaves your device
Nothing to delete later
Secure connection
Works in every modern browser
How it works
- 1
Add your PDF
Drop the PDF onto the page or click to browse and select it.
- 2
Set your watermark
Type text or choose a logo, then adjust the position and how faint it appears.
- 3
Apply & download
Press Apply — the watermarked PDF is built in your browser and downloads instantly.
Why use this tool
Mark every page
Apply a “Confidential”, “Draft”, or branded watermark across the whole document at once.
Private by design
The watermark is applied locally in your browser — your file is never uploaded.
Text or image
Use words like DRAFT or CONFIDENTIAL, or drop in your own logo.
You control the look
Position, angle, and opacity are yours to set so the mark is clear but not distracting.
Free & unlimited
No account, no trial, no per-file charges — watermark as many PDFs as you need.
Works on any device
Phone, tablet, or computer — it runs in the browser you already have.
What does adding a watermark do?
A watermark places a semi-transparent word or image over every page of a PDF, sitting on top of the content without hiding it. It is how you label a document’s status — DRAFT, CONFIDENTIAL, SAMPLE — or mark it as yours with a logo or name. Because the mark repeats on each page, it stays with the document even if pages are copied or shared out of order. Since this tool runs entirely in your browser, the watermark is applied on your own device and the file is never uploaded, which matters when the document you are marking is itself sensitive.
When should you watermark a PDF?
Watermark when a document’s status or ownership needs to be obvious at a glance. Businesses stamp CONFIDENTIAL on internal reports and DRAFT on documents still under review, so no one mistakes a work-in-progress for the final version. Designers and photographers mark proofs with a logo so previews cannot be used without permission. Freelancers add SAMPLE to portfolio PDFs. It is also a gentle deterrent against casual copying, since the mark is baked into every page.
How to get the best results
Choose an opacity that is visible but still lets the text underneath be read — a faint diagonal mark usually strikes the right balance. Keep watermark text short so it reads instantly: one or two words beat a sentence. For a logo, use a version with transparency so it sits cleanly over the page. Place the mark where it overlaps content enough to be hard to crop out, but not so central that it makes the document unusable. Preview before saving to check the balance.
Limitations to be aware of
A watermark is a visual overlay, not hard security — it discourages casual misuse but a determined person can sometimes remove or crop it. If you need to actually restrict who opens a file, add a password instead; the two can be combined. A very heavy or centred watermark can make the document hard to read, so err toward subtle. And because the mark is applied to the page image, it becomes part of the document; keep an unmarked original if you will need a clean copy later.
Common mistakes and how to avoid them
The most common mistake is setting the opacity too high, so the watermark drowns out the text; lower it until the content reads easily. Another is a long watermark phrase that is hard to take in at a glance — keep it to a word or two. People sometimes place the mark in a corner where it is trivial to crop; a diagonal across the middle is harder to remove. Finally, always keep an unmarked original, since removing a baked-in watermark later is difficult.
Using it on mobile and desktop
On a computer, add a branded or CONFIDENTIAL watermark to a report before circulating it, with full control over placement. On a phone, quickly stamp DRAFT or SAMPLE onto a document before sharing it in chat; everything runs locally, so nothing is uploaded. Because there is no app to install, the same link works on every device, and the watermarked file opens the same for everyone.
Why watermark here instead of another site?
The documents people most want to mark CONFIDENTIAL are exactly the ones they should not upload to a stranger’s server — yet most online watermark tools do just that. This tool never uploads your file; the watermark is applied inside your browser, so the sensitive document stays on your device. There are no sign-up walls and no limit on how many files you mark. For labelling private documents, doing it locally is simply the sensible approach.
How it compares
| Feature | This tool | Typical online PDF tools |
|---|---|---|
| File uploaded to a server | Never — applied in your browser | Usually uploaded |
| Text and image watermarks | Yes | Yes |
| Adjustable opacity & angle | Yes | Varies |
| Extra tool watermark on output | No | Sometimes |
| Account or sign-up | Not required | Often required |
| Price | Free | Free / paid tiers |
Features
Text watermarks
Add words like CONFIDENTIAL, DRAFT, or a name across each page.
Image watermarks
Place a logo or signature image over the pages.
Adjustable opacity
Make the mark bold or subtle so the content stays readable.
Diagonal or straight
Angle the watermark across the page or keep it level.
Applies to all pages
Mark the entire document in a single step.
No installation
Nothing to download or install — it works on the web page.
Arabic & RTL friendly
Full interface in eight languages, including right-to-left Arabic.
Secure by default
Served over HTTPS, with no file tracking and no third-party upload.
Who uses it
Businesses
Stamp CONFIDENTIAL or DRAFT on internal documents so status is clear at a glance.
Designers & photographers
Mark proofs with a logo so previews cannot be used without permission.
Freelancers
Add SAMPLE to portfolio PDFs shared with prospective clients.
Everyday users
Label a document as a draft or copy before sharing it — privately, on their device.
Frequently Asked Questions
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