Add a text watermark to a PDF
Add a PDF, type the watermark text, set position, angle, size, color and opacity, then check the preview of the first stamped page before downloading.
Drag & drop PDFs here — or click to choose files
PDF — files stay on your device
How to use it
- Add one PDF, then type the watermark text.
- Set position, angle, size, color, opacity and the page range.
- Check the before/after preview, then download the stamped PDF.
Limits & formats
Regular unencrypted PDFs up to 50 MB and 100 pages. The watermark is rendered with your device's system fonts (Chinese included) and embedded as a high-resolution image — 150 or 300 dpi selectable — not as vector text, so it is honest about quality but is still text you chose to place. Very long texts wrap to multiple lines.
Privacy
Your PDF is processed locally in this browser tab. YYSI servers never receive your files. Only anonymous usage counters (tool name, success or failure, rough size range) are recorded.
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