Add Watermark to PDF
Stamp a text watermark on every page — diagonal or horizontal, free
100% private — Files are processed right in your browser and never uploaded to any server.
How it works
- 1
Drop in the PDF you want to watermark.
- 2
Type your text and pick a color, size, opacity and orientation.
- 3
Click Process and download your watermarked PDF.
Why people choose us
Private by design
Your input is processed securely and never sold. Client-side tools never leave your browser at all.
Instant & free
No installs, no waiting. Results in seconds, right in your browser, on any device.
Free forever
No sign-up, no watermarks, no limits. All client-side tools are free to use as much as you like.
Frequently asked questions
Can I use my own text?⌄
Yes — type anything up to 60 characters, like "CONFIDENTIAL", "DRAFT", or a company name.
Does it cover the content underneath?⌄
No — the watermark is semi-transparent (you control the opacity), so the original content stays fully readable.
Is my file uploaded?⌄
No — the watermark is drawn entirely in your browser. Your PDF never leaves your device.
Can I remove a watermark added by this tool?⌄
Not with this tool — keep your original file if you might need an unwatermarked copy later.