Add Watermark to PDF Free Online

Protect your documents or mark them as drafts with PDFInSnap's free watermark tool. Add custom text watermarks to any PDF — adjust the text, angle, and opacity right in your browser. No upload, no account, and no watermarks added on top of yours.

Drop a PDF here or click to browse

PDF files only

Watermark text

Opacity: 30%

Font size: 48pt

Diagonal (45°)

🔒 Files stay in your browser♾️ No file size limits🆓 Always free

Frequently Asked Questions

Can I customize the watermark text?

Yes. Enter any text — "CONFIDENTIAL", "DRAFT", your name, or anything else.

Can I control watermark transparency?

Yes. Adjust the opacity to make the watermark subtle or prominent depending on your needs.

Also try the full Watermark PDF tool, or explore all PDF tools.