Add Watermark to PDF Online Free
Overlay text watermarks on every page of your PDF with custom font, size, and opacity.
Files never uploadedInstant results100% freeWorks on mobile
How to Use
- 1Upload your PDF file by dragging it into the drop zone.
- 2Enter your watermark text and customize the font size, rotation, opacity, and color.
- 3Click Add Watermark to apply it to all pages.
- 4Download your watermarked PDF instantly.
Frequently Asked Questions
Can I adjust the watermark angle?
Yes. You can set any rotation angle from -180 to 180 degrees. The default is -45 degrees for a diagonal watermark effect.
Can I make the watermark semi-transparent?
Yes. The opacity slider lets you set transparency from 0.05 (very faint) to 1.0 (fully opaque). A value of 0.3 is recommended for subtle watermarks.
Is my file uploaded to a server?
No. All processing happens locally in your browser using pdf-lib. Your files never leave your device.
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