Sign PDF
Draw your signature or upload a signature image and place it anywhere on a PDF. Your signature and file never leave your browser.
Your files never leave this device. Everything is processed inside your browser and nothing is uploaded to a server.
How to use the Sign PDF tool
- Click "Choose PDF file" or drag the PDF you want to sign onto the screen.
- Draw your signature in the white box with a mouse or your finger and click "Done". Click "Clear" to start over. To use a photo of a signature on paper, click "Upload signature image".
- Drag the signature on the page to where you want to sign, and drag the circle at its lower right to resize it. Use the ‹ › buttons to change pages.
- Click "Sign PDF", then click "Download" when it is done.
Frequently asked questions
Are my files uploaded to a server?
No. Files are processed only inside your browser and are never sent to any server. Only the code and character mapping data needed for processing are downloaded from this site; your files themselves never leave your device. You can check this yourself in the Network tab of your browser's developer tools.
Are my files safe even with ads on the page?
Yes. Ads only run outside the tool area. The tool area, where you choose and process files, is an isolated space your browser keeps separate, so other scripts on the page, including ads, cannot read your file content or file names. Nothing inside the tool area can be sent out. When you drag a file onto the page, the tool area expands to fill the screen so the isolated space receives the file.
Is this signature legally binding?
This tool places a picture of your signature on the PDF. It is not a certificate-based digital signature. If the signature must be legally valid, check first that the other party accepts this method.
Is my signature stored?
No. Your signature is only used on this device and is never stored or sent anywhere. It is gone when you close the page.
Will the signature background cover the text?
A drawn signature is added with a transparent background, so it does not cover the text underneath. An uploaded photo keeps its background, so a PNG with a transparent background looks cleaner.
Can I add the same signature to several pages?
Choose "All pages" to add it at the same spot on every page. To sign different spots on different pages, sign one page at a time and run the tool again on the result.