Edit PDF
Watermark PDF
Add text or image watermark
Stamp every page with text or an image, choose opacity, position, rotation, and the page range.
Browse all toolsFiles processed in your browser — never uploaded
In your browser
Files never leave your device.
Instant
No signup, no upload queue.
Free forever
All tools, no paywall, no watermarks.
No tracking
We don't keep or analyze your files.
How to use Watermark PDF
Step 1
Load the PDF
Drop the file you want to edit into the workspace.
Step 2
Make your changes
Crop, rotate, watermark, or annotate directly in your browser.
Step 3
Apply locally
All edits are written to a new PDF on your device — the original is untouched.
Step 4
Download the new PDF
Grab the edited file with a fresh branded filename.
Frequently asked questions
Everything we get asked most often about Watermark PDF.
Are my files uploaded to a server?
No. Every conversion runs inside your browser using WebAssembly. Your files never leave your device — not even temporarily.
Is the output watermarked or limited?
No watermarks, no signup wall, no size cap beyond what your browser can handle. Every download is yours, plain and unbranded inside the file.
Does this work on mobile?
Yes. The tool works in any modern browser on iOS, Android, Windows, macOS, or Linux. Large files may run faster on a desktop, though.
Are edits applied to the original?
No. Every edit produces a new PDF — your original file is never modified on disk.
Can I undo a change?
Edits are batched into a single output. To revert, simply use the original PDF as the input again.