Watermark PDF

Stamp a text watermark — like DRAFT or CONFIDENTIAL — across every page of a PDF. Set the colour, size, opacity and angle, all in your browser.

Load a PDF, type your watermark text, and it is stamped onto every page — all in your browser.

Drop a PDF here, or click to browse .pdf · stays on your device

How to Watermark a PDF

Three steps, all in your browser.

1

Add your PDF

Drag in a PDF or click to browse. Page one appears as a live preview.

2

Set the watermark

Type your text and adjust the colour, size, opacity and diagonal angle. The preview updates as you go.

3

Stamp and download

Click Add Watermark to download a new PDF with the watermark on every page.

Frequently Asked Questions

How do I add a watermark to a PDF?
Load your PDF, type your watermark text, and choose a colour, size, opacity and whether it sits diagonally. Click Add Watermark and every page gets the stamp in a new downloadable file.
Can I make the watermark faint?
Yes. The opacity slider goes from very light to solid, so you can lay a subtle background mark or a bold overlay.
Does it watermark every page?
Yes — the text is drawn on all pages, centred and optionally rotated 45°. The preview shows page one; the download applies to the whole document.
Is my PDF uploaded?
No. The watermark is drawn in your browser with pdf-lib and nothing is uploaded. Closing the tab clears everything.