Stamp text or a logo on PDF pages, once or tiled, with opacity, rotation and size controls and a live preview. Runs in your browser; nothing is uploaded.
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Works in your browser. What you paste or upload is processed on your device.
Drop the PDF on the tool or tap to pick it. The first page appears in the preview.
Type the watermark text, or switch to Image and choose your logo file.
Adjust opacity, rotation and size, and choose a single position or a tiled pattern. The preview updates live.
Leave the page box empty for every page, or type a range such as 2-10.
Press Add watermark and download the stamped PDF.
This tool stamps a watermark onto the pages of a PDF: a word such as CONFIDENTIAL, DRAFT or COPY, or your logo as an image. You set how faint it is (opacity), its angle, its size, and whether it appears once in one of nine positions or repeats across the whole page in a tiled pattern. The preview shows the watermark on your real page as you change each setting.
Text watermarks are written as real PDF text in a standard font, so they stay sharp at any zoom. Logos can be PNG, JPG, WebP, SVG or HEIC; a PNG with a transparent background looks best, and there is an option to make the white around a logo transparent. You can watermark every page or only a range such as 2-10.
Limits: the watermark is placed on top of the page content, not behind it, so keep the opacity low (20-40%) to leave the text readable. A watermark deters copying but anyone with a PDF editor can remove it; it isn't a security feature. Text in scripts the standard PDF fonts don't cover (Hindi, Arabic, Chinese and others) is added as a sharp image instead of selectable text.
A visible watermark tells every reader that a document is a draft, confidential, a sample or your property, and a logo stamp brands proposals and price lists before you send them out. Because the work happens in your browser, contracts and internal files never leave your device to get stamped.
Something else? Ask the team
No. Your browser opens the PDF and writes the watermark on your device. Our server only records that a run happened for the daily free run and credits; the file itself never leaves your device.
Not in this tool: it places the watermark on top of the page. With the opacity at 20-40% the text underneath stays easy to read, which is how most draft and confidential stamps are made.
Someone with a PDF editor can. A watermark marks a document as confidential or yours and discourages casual copying, but it doesn't encrypt or lock the file. To stop people opening it, add a password with a protection tool.
A PNG with a transparent background. If your logo is a JPG on white, tick Make white areas transparent so only the logo itself is stamped.
Yes. Type the pages in the Pages to watermark box, for example 1 for the first page only or 2-10, 15 for a mix. Other pages stay unchanged.
Yes, in Safari on iPhone and Chrome on Android. The preview fits the screen, and the finished PDF downloads to your Files or Downloads folder.
You get 1 free run per tool per day. After that, each run costs 5 credits with a free AI Rank Lab account. One run watermarks one PDF, however many pages it has.
Each one opens on its own page and works straight away, with no sign-up.
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