Is my input uploaded?
No. Processing happens in this browser. The selected files or text are not sent to a conversion service.
Tools
Add a Watermark to PDF
Add text or a PNG/JPG watermark to selected PDF pages with position and opacity controls.
Choose a PDF and add a text or PNG/JPG watermark to selected pages. Set its opacity, scale, rotation and position, then download a new local copy. A visible watermark communicates status or ownership, but it does not encrypt the document or prevent someone from editing it.
Your PDF and any signature or watermark stay in this browser.
Add text or a logo to every page in the selected range.
Text is rendered into an image stamp so English and Chinese watermark text can be placed consistently.
How to use this tool
- Choose a PDF and enter text or select a logo.
- Set the page range, position, size, rotation and opacity.
- Create and download the watermarked PDF.
Ways to use it
- Mark review status
- Label drafts, confidential copies or approved documents.
- Add ownership details
- Place a company name or logo on distributed PDFs.
Supported files and limits
- A watermark is a visible overlay, not access protection or redaction.
- Existing certificate signatures may no longer validate after editing.
Common questions
Can I use a logo?
Yes. Select a PNG or JPG image of up to 10 MB instead of text.