Watermark a PDF
Text or image, on every page. Runs in your browser — your PDF file is never uploaded.
or drop it here · nothing leaves your device
- Runs on your device
- No sign-up or watermark
- No file size cap
How to watermark a pdf
- STEP 1
Choose your PDF file
Click the button above or drag the file onto the page. Nothing is transmitted.
- STEP 2
Set the options
The defaults suit most people. Adjust them if you have a specific target in mind.
- STEP 3
Download the result
The output saves straight to your Downloads folder. Your original is untouched.
What survives, and what does not
The original content, unchanged where the format allows
Your original file, which is never modified
Anything the target format genuinely cannot represent
Honest limits are published on every tool page. If a tool cannot do something well, it says so here rather than letting you find out after the download.
Watermark a PDF questions
Is watermark a pdf free?
Yes — completely, with no account, no watermark and no daily cap. Serving a static page costs us almost nothing because your device does the actual work.
Is my file uploaded?
No. Every tool here runs as WebAssembly inside your own browser tab. Open DevTools and watch the Network panel while you run it: nothing goes out.
Is there a file size limit?
No fixed limit. The practical ceiling is your device memory, which on a desktop is far higher than the caps most online converters impose.
Does it work offline?
Yes, once you have used the tool at least once. The engine is cached on your device, and the whole thing keeps working with no connection.