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Add Watermark to PDF

Add text or image watermarks to all pages — processed locally in your browser. Free, no upload, no account.

100% free · no upload · no account · works offline

Protect your documents with text or image watermarks, applied to every page in batch. Your files never leave your device.

🔒 Privacy first: this tool runs entirely in your browser (open-source PDF.js engine). Your file is read locally, processed in memory, and never transmitted. Disconnect Wi-Fi and try it — it still works.