Watermark PDF Securely
Stamp a diagonal text watermark across every page — entirely in your browser.
Click or drag files here
Supports PDF documents up to 100MB. Processed entirely in your browser.
How it works
1
Select a file
Drag and drop the PDF you want to watermark.
2
Enter your text
Type the watermark, like CONFIDENTIAL or DRAFT, and choose its opacity.
3
Download
Save the watermarked PDF with the stamp on every page.
Frequently Asked Questions
Will my document be uploaded?
No. The watermark is applied in your browser, so the file never leaves your device — ideal for marking confidential legal drafts.
Which characters are supported?
Watermark text currently supports Latin letters, numbers, and basic punctuation. Support for additional scripts is planned.