Watermark PDF
Mark drafts and confidential files.
Local file tool
Watermark PDF
No server upload
Drop your file here
PDF · one file
Files stay on this device. Nothing is uploaded.
Add a visible text watermark to every PDF page locally.
Watermark PDF
Local file
Selected file
Discard your changes?
Your file stays on this device, but edits in this workspace will be lost.
Ready to download
How it works
Everything Happens On Your Device
- 01
Select your file(s)
Everything is read straight into your browser.
- 02
Processed on your device
No file uploads for processing, processing servers, or upload queue.
- 03
Download the result
A separate file — your original stays untouched.
Private browser guide
A visible local watermark
SoraFiles embeds the text into a new PDF and verifies every page before offering the result.
A visible watermark is not encryption or access control.
Questions
No. Watermarking and output verification happen locally in this browser.