Watermark PDF
Stamp a text watermark across every page of your PDF, free and in seconds. Choose your own wording, font size, opacity and a diagonal or straight angle, then download the watermarked file. Everything happens in your browser — your PDF is never uploaded to a server, and there is no signup or extra watermark added by us.
A free alternative to iLovePDF, Smallpdf — no signup, no upload, no watermark, and no daily limit. It runs entirely in your browser, so it’s private and instant, and it stays free.
How to use it
- Choose a PDF file from your device.
- Type your watermark text and adjust size, opacity and angle.
- Click “Add watermark” to stamp it onto every page in your browser.
- Your watermarked PDF downloads automatically.
FAQ
- Is my PDF uploaded to a server?
- No. The watermark is drawn entirely in your browser using JavaScript — your file never leaves your device.
- Can I control how the watermark looks?
- Yes. Set your own text (default “CONFIDENTIAL”), font size, opacity from faint to solid, and choose between a 45° diagonal stamp or a straight horizontal one.
- Does the watermark appear on every page?
- Yes, the same watermark is stamped once on each page of the PDF, centred, before you download the result.
Need something written instead? Browse Harnests’ £1 AI tools — captions, cold emails, listings and more.