Sign a PDF
Add your signature image to a PDF, choose its position and size, and apply it to one page or every page. Free, private and done in your browser.
- Files never leave your device
- Free, no sign-up
- No watermark
About Sign PDF
Sign contracts, forms and letters without printing and scanning. Upload an image of your signature, choose where it goes on the page and how big it should be, and apply it to a single page or to every page. Preview the result, then download the signed PDF. The document and your signature are processed entirely in your browser and are never uploaded.
How to use Sign PDF
- 1
Drop the PDF you need to sign.
- 2
Upload an image of your signature, ideally a PNG with a transparent background.
- 3
Choose the position and size, and whether to sign every page.
- 4
Click Sign and download the signed PDF.
Why use this tool
- Place a signature image on one page or all pages.
- Preset positions and adjustable size.
- Preview before downloading.
- Your signature image is never uploaded or stored.
- Free and unlimited.
Frequently asked questions
A signature image is accepted for many everyday documents, but some contracts require a certified digital signature or a signing service with an audit trail. Check what your recipient needs.
Sign on white paper, photograph it in good light and crop it, or draw it in an app and export it as a PNG with a transparent background.
Yes. Choose apply to all pages and the signature is placed on each one.
Run Flatten PDF after signing to merge the signature into the page content.
No. It is used in your browser only and is gone when you close the tab.
Yes. There is no account, no watermark and no usage limit. The tool runs in your own browser, so there is no server cost to charge you for.
Yes. It runs in any modern browser on Android and iOS as well as on Windows, macOS and Linux, with nothing to install.
Related tools
All PDF tools →- Fill PDF FormFill in the fields of any fillable PDF form, tick boxes and choose options, then save it, optionally flattened.
- Flatten PDFFlatten PDF form fields, signatures and annotations into the page so they cannot be edited again.
- Edit PDFAdd text, drawings, highlights, shapes, images and white-out to any PDF, right in your browser.
- Merge PDFCombine multiple PDF files into one document in seconds.
- Split PDFSplit a PDF into single pages, custom page ranges, every N pages or files under a size limit.
- Compress PDFReduce PDF file size by re-encoding page images at the quality you choose, or strip metadata losslessly.