How do I add a watermark to a PDF online?

Upload your PDF document in the box above, type your custom watermark text (e.g., 'CONFIDENTIAL' or 'DRAFT'), adjust the color, transparency, and angle, then click 'Apply Watermark Now' to download your protected file.

Can I adjust watermark transparency and color?

Yes. You can select from curated color presets, customize font size, and set opacity so the watermark protects your content without obscuring document readability.

Is the watermark applied to every page?

Yes. PDFLOL stamps your designated watermark consistently across all pages in the document.

Are my documents kept private?

Yes. All watermarking is rendered client-side in your browser via WebAssembly. Your files are never uploaded to any remote server.

Is it free to watermark PDF files on PDFLOL?

Yes, PDFLOL provides free, unlimited watermarking with zero subscriptions and no account creation required.

Marca d'Água em PDF

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