Watermark PDF
Add a custom text watermark (e. Free, private, and processed on your device.
1 Select or drop your file to start Watermark. Everything runs directly in your browser.2 Choose your target size or options. Watermark processes the file instantly on your device.3 Download your finished file. Nothing is ever uploaded to a server.
About this tool
Stamp text watermarks like "DRAFT", "CONFIDENTIAL", or your company name across every page of a PDF with clean opacity.
Watermark PDF is processed entirely on your device. Your original file remains untouched, and nothing is ever uploaded to a server or saved in the cloud.
- No upload: watermark stamps are embedded directly in the PDF streams on your device.
- Speed: processing happens instantly on your device with no upload or download delays.
- Quality: you can check your file before saving, and the original remains unchanged.
FAQ
Does “Watermark PDF” upload my file?
Watermark PDF processes your file locally in this browser tab. There is no upload step and no account required.
What will “Watermark PDF” actually change?
Custom text stamp positioned across all pages.
When is “Watermark PDF” the wrong job?
Semi-transparent styling ensures underlying text remains legible.
How do I check the result of “Watermark PDF”?
Ideal for review copies, NDA drafts, and sample distributions.
Can I run “Watermark PDF” with Wi-Fi off?
You can turn off Wi-Fi after loading this page and Watermark PDF still works completely offline.
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Last updated 2026-09-27.