Sign PDF
Place a picture of your signature on the pages you choose, with a white background made transparent. The PDF and the signature never leave your device. Your inputs stay in this browser tab.
Your result
A little input. A useful result.
Your result will appear here.How to use Sign PDF
- Choose supported files from your device.
- Adjust pages to sign (for example 1, 3-4, or last), position, signature width (% of page width, 5–60) as needed.
- Choose the action button. Review the result, then copy text or download a file when available.
- Choose Clear all when finished to remove inputs and results from the interface.
Limits, without the small print.
Choose one PDF and one PNG, JPEG or WebP picture of your signature, up to 12 megapixels. This adds a picture; it is not a certified digital signature and does not prove who signed. Unencrypted PDFs only. Maximum 20 MB combined and 300 pages. Keep originals. Editing can invalidate signatures. Cropping or hiding content is not secure redaction. No PDF-to-Office or OCR fidelity is promised.
One job runs at a time. You can cancel it; jobs stop after 30 seconds. Browser and device capabilities affect performance.
How StillKit keeps your files on your device →What this tool does
Draws your signature picture on each chosen page at the selected corner and keeps it upright on rotated pages. Near-white pixels become transparent with soft edges, so the page shows through around the ink.
Example input
Select a supported local file; the visible settings are a starting example.
What to expect
Review the generated local preview or downloadable copy before using it.
Questions people often ask.
Does Sign PDF upload my data?
No. Sign PDF opens your files inside this browser tab and creates the result on your device. Your text and files are not sent to an application server. The website's host receives ordinary page and code requests; see our privacy policy.
Will this change my original PDF?
No. StillKit creates a new PDF for you to download, and your original file stays exactly as it was.
Can I use it for confidential documents?
The document is processed inside your browser tab and is not uploaded. Use a device you trust, and remember that hiding or cropping content is not secure redaction.
Why will my PDF not open here?
Password-protected or damaged PDFs cannot be processed. If you are allowed to, remove the password in the app that created the file and try again.