Add a Watermark to a PDF
Stamp CONFIDENTIAL, DRAFT, or anything else diagonally across every page — one large mark or a repeating tile, at the opacity you choose.
✅ 100% Free🚫 No Watermark🔒 No File Upload📱 Works on Mobile⚡ Instant Result🙅 No Signup
This page processes your file inside this browser tab. It makes no network requests with your data — check it yourself in 10 seconds.
How it works
- Choose a PDF and type the watermark text.
- Set opacity and size; tick “tile” for a repeating pattern across the page.
- Stamp it and download the watermarked file.
Who uses this tool
🔒 Your files never leave your device
There is no upload step to worry about, because there is no server. The file you choose is processed by your own browser, on your own device, and the result downloads straight from its memory. Once this page has loaded, the tool keeps working with the internet disconnected — try it in airplane mode. Unlike sites that promise to “delete your files after one hour”, there is nothing to delete: your file was never sent anywhere. See how to verify this yourself →
💡 Tips for the best result
- 15–25% opacity labels a document without hurting readability; go higher only for SAMPLE-style stamps.
- Tiled mode covers the whole page — better for anything that might be screenshotted in pieces.
- Watermark first, then compress, if you're preparing a size-limited upload.
Frequently asked questions
Can the watermark be removed later?
It becomes a normal page object, so a determined person with editing tools can remove it. Treat it as labelling, not security.
Can I watermark specific pages only?
The stamp applies to all pages. To watermark part of a document, split it first, stamp one part, and merge back.
Is my document uploaded?
No — the watermark is drawn into the file by your own browser, offline-capable after first load.
Can I use an image or logo as the watermark?
Not yet — text only for now. A logo stamp tool is on the roadmap.