PDF Watermark

Stamp text or image watermarks across PDF pages with live preview.

Drop a PDF here or click to select

Your file never leaves your device · No signup · No daily limit

Up to 100 MB per file

How it works

Drop a PDF and choose a text or image watermark.
Style it: opacity from 5–100%, rotation (0–90°, diagonal 45° by default), font size and color for text, scale for images.
Position it on a 9-point grid, or switch to tile mode to repeat it across the whole page. The live preview shows page 1 exactly as it will print.
Apply to all pages or a page range and download the watermarked PDF.

The watermark is drawn into the page content (visible in every PDF reader) but a determined editor could still crop or cover it; for uncopyable protection combine it with Protect PDF restrictions.
Text watermarks use the built-in Helvetica font, so they render Latin characters; for other scripts use an image watermark.

Yes, type a page range like "1,3-5" to stamp only those pages, or leave it on all pages.

Text is instant and crisp for words like CONFIDENTIAL; an image (PNG with transparency works best) is right for logos or non-Latin scripts.

No. The preview and the final stamping both happen in your browser with pdf-lib; the file never leaves your device.