Watermark PDF
Stamp text like "CONFIDENTIAL" across every page.
Add a text watermark to your PDF — perfect for drafts and confidential documents. Choose the text, opacity and layout (diagonal tiled or centered), then download instantly.
Your files are processed locally in your browser. Nothing is uploaded to a server, ever.
Tip
Drop your file here or click to browse. Everything is processed on this device — nothing is uploaded.
Quick answers
- What does this tool do?
- Stamp text like "CONFIDENTIAL" across every page. Add a text watermark to your PDF — perfect for drafts and confidential documents. Choose the text, opacity and layout (diagonal tiled or centered), then download instantly..
- Is it free?
- Yes — free and unlimited, with no account required and no watermark on the result.
- What files are supported?
- PDF files, up to 100 MB each.
- Where is my file processed?
- Entirely in your browser. Your file never leaves your device — nothing is uploaded to a server.
- What are the limitations?
- Text watermarks only — use Image Watermark for PNG/JPG stamps. Watermark text becomes part of the rendered page, so it cannot be removed later.
- What happens if processing fails?
- You get a clear message explaining what went wrong and how to fix it (try another file, check the format, or start over). Your original file is never touched.
How to Watermark PDF
- Upload the PDF to watermark.
- Type your text (e.g. CONFIDENTIAL), pick a layout and opacity.
- Click "Process" — every page is stamped.
- Download the watermarked document.
Frequently asked questions
Common problems and fixes
- The password is not asked when I reopen the file
Why: your PDF viewer remembered the password for the session, or you are opening the original rather than the protected copy.
Fix: test the newly downloaded file in a different viewer or an incognito window — the encryption is real and applied on download.
- I forgot the password I set
Why: the file is genuinely encrypted — there is no backdoor and no recovery key.
Fix: no tool can recover it honestly; keep document passwords in a password manager from the start.
- Some apps ignore the restrictions I set
Why: permission restrictions are honoured by compliant readers but are not cryptographically enforced against all software.
Fix: for real confidentiality use full encryption (open password), not permission flags alone.
Who uses Watermark PDF?
- Legal, medical and HR work — documents that must never touch a server — everything is encrypted locally in your browser.
- Anyone emailing sensitive files — a password layer on top of email, so only the recipient who knows it can open the file.
- Long-term archives — encrypted scans stay confidential even if the storage location is later shared or breached.