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Watermark PDF online
Label a review copy with a visible text watermark.
Choose files
Watermarks are visible labels, not copy protection or redaction.
Files are processed on this device. No upload, account, or subscription.
Your PDF preview appears here.
Choose a file or try the sample.How to use Watermark PDF
Add a translucent text watermark to selected PDF pages. Choose the text, size, color, and opacity before exporting a copy.
- Choose your source files.
- Enter watermark text and select its appearance.
- Run the tool, review the result, and download your copy.
Good to know
Watermarks are visible labels, not copy protection or redaction.
Keep your original. Review the downloaded result before issuing, printing, or replacing a project file.
About Watermark PDF
Is this tool free, and do files get uploaded?
Yes. This tool runs locally in your browser without an account. PolyPDF does not receive your input files. Downloads are saved only when you choose to save them.
What files and limits does this tool support?
Choose 1 PDF files. The toolkit supports up to 30 MB per file, 80 MB total input, and 500 PDF pages. Image rendering is limited to 100 pages per operation and 16 megapixels per page. Password-protected files are unsupported; editing signed files is blocked.
Can an AI assistant use this tool?
Yes. The downloadable local MCP server exposes the same operation and validation rules. Compatible browser agents can use the selected files through WebMCP when their browser supports it. Read the setup and privacy details.
WHEN THE FILE IS A DRAWING
Measure, take off, and review in PolyPDF.
Continue with calibrated measurements and construction markup on Mac and Windows.