About Add Watermark to PDF – Free Online Tool
Our free PDF watermark tool lets you add a custom text watermark to every page of a PDF directly in your browser. Adjust the watermark text, font size, opacity, rotation angle, and position. Choose diagonal tile mode for full-page coverage. No file is uploaded — pdf-lib handles everything locally.
How to add watermark to PDF — step by step
- Upload your PDF files onto the watermark tool.
- Enter your watermark text and customize size, opacity, and rotation.
- Click 'Apply Watermark' and download your watermarked PDFs.
Why use EasyConverter.io?
- No upload required — files never leave your browser, ensuring complete privacy and security.
- Free forever — no account, no limits, no hidden fees.
- Instant results — conversion happens using your device's processor. Results in under a second.
- Batch convert — process up to 5 files simultaneously with a single click.
Frequently Asked Questions
Yes, up to 5 PDFs at once with the same watermark settings.
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