123024.com · PDF Watermark
Add text or image watermarks to your PDF files directly in the browser. Choose between single placement or tiled patterns, adjust font, color, opacity, rotation, and position. No data is uploaded — all processing uses the pdf-lib library.
Add text or image watermarks to your PDF files directly in the browser. Choose between single placement or tiled patterns, adjust font, color, opacity, rotation, and position. No data is uploaded — all processing uses the pdf-lib library.
1. Upload a — PDF Drag and drop a PDF file onto the drop zone, or click to browse. The file stays in your browser.
2. Configure your watermark — Choose between text or image watermark. Adjust font, size, color, opacity, and position. Use tiled mode for copyright protection with repeated watermarks across all pages.
3. Download — Preview the watermarked first page in real-time, then download the watermarked PDF with the watermark applied to all pages.
Does this tool upload my PDFs? No. All PDF processing happens in your browser using the pdf-lib library. Your files never leave your device.
Can I use CJK (Chinese, Japanese, Korean) characters in text watermarks? Currently, only standard Latin fonts are supported (Helvetica, Courier, Times Roman). CJK font support may be added in a future update.
What is tiled watermark mode? Tiled mode repeats your watermark across all pages in a diagonal pattern. This is useful for copyright protection, as the watermark cannot be easily cropped out.