Is this tool really offline?

Yes. All processing happens locally in your browser. Your files never leave your device.

Yes, completely free with no registration required.

Absolutely. No files are uploaded to any server. Everything stays on your device.

JavaScript is required to use these tools. Please enable JavaScript in your browser settings to convert files.

Zero-Server Storage · 100% Private Your files are processed entirely in your browser. Nothing is uploaded, stored, or seen by anyone — safe for confidential & GDPR/HIPAA-sensitive documents.

PDF Watermark - Free Offline Tool (No Upload)

Add text watermarks to PDF files in your browser. 100% offline - no upload, no account, no data sent to any server. Free.

No Upload 100% Private Free

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Drop your PDF here

Watermark text will be added to every page

Frequently Asked Questions

Does the watermark appear on every page?

Yes. The text watermark is applied diagonally across every page of the PDF.

Does this PDF watermark tool work offline?

Yes. pdf-lib processes your file entirely in the browser. No server involved.

Can I remove the watermark later?

This tool burns the watermark as a text layer into the PDF. Keep your original file if you need an unwatermarked version.