Free · runs in your browser · nothing is uploaded · works offline
Add a Watermark to a PDF Online — Free, No Upload
Text watermark on every page (or a range): diagonal, repeating tile, header or footer.
Text watermark on every page (or a range): diagonal, repeating tile, header or footer.
Private by design: processing happens on your device with open-source libraries served from this site (licences). Nothing is uploaded, and once loaded the tool keeps working offline. Need other tools? All tools are on the homepage.
Free, no ads, no upsell. If it saved you a trip to a paid converter, you can buy the developer a coffee — it funds new tools and keeps this one free. ☕ Buy me a coffee
Runs on your deviceTested on Pixel 7 & MacBook Air M2Open-source engines · licences
About this tool
Type the text, choose a layout, colour and opacity, and press Add watermark. Diagonal mode sizes the text to span the page corner to corner; Tile repeats it at 30° so it cannot be cropped out; Header and Footer put a single line at the top or bottom. The stamp is drawn as vector text, so it stays sharp at any zoom and prints cleanly.
The output is a new file (
How it works
- Step 1. Choose or drop the PDF(s).
- Step 2. Type the text; pick layout, colour, opacity and pages.
- Step 3. Press Add watermark and download.
Questions
Can I use an image or logo as the watermark?
This tool stamps text. For a logo, use Sign PDF with the logo drawn or placed as the "signature" image.
Can the watermark be removed later?
It is part of the page content; removing it is not supported here, by design.
Will it cover my text?
At 15–30% opacity the page remains readable; use 50–100% only for header/footer lines.
Good to know
- Text only (Helvetica Bold).
- No image watermark.