Sign a PDF
Draw your signature on the page, or upload an image of it. Move it to the correct place, resize it, and save the file. The PDF does not leave your device.
How it works
- 1
Drop the PDF into the box, or click to choose it. Pick the page that needs the signature in the strip on the left.
- 2
The Draw tool is selected. Draw your signature on the page with the mouse, a pen, or your finger. Or click Image and upload a PNG or JPG of your signature. Drag it into place and pull the corner to resize it. Use the Text tool to add the date or your name.
- 3
Click Save PDF. The signed file downloads at once.
Secure and private by design
- Files never leave your deviceThe tool runs as JavaScript in your browser. There is no upload and no server-side copy of your document.
- Works offlineAfter the page loads, you can disconnect from the internet. Processing does not need a connection.
- No queue, no limitsYour device does the work, so there is no waiting line, no daily quota, and no watermark.
Frequently asked questions
Add the PDF and draw your signature on the page with the Draw tool. You can use the mouse, a pen, or your finger on a touch screen. Move and resize the signature, then click Save PDF. The signature becomes part of the page. No printer and no scanner are needed.
Yes. Sign a white sheet of paper, take a photo or a scan, and save it as PNG or JPG. Click Image, choose the file, and place it on the page. A PNG with a transparent background looks best. The image is embedded in the PDF at its full quality.
The tool draws a picture of your signature into the page. It does not add a digital certificate, and it does not check who signed. Many agreements accept a drawn signature, but the rules differ by country and by contract. If the other party needs a certificate-based signature, use a service that issues one.
Yes. The page works in the browser of a phone or a tablet. Draw with your finger or a stylus. Pinch to zoom the browser if the field is small. The file stays on the phone.
Yes. Choose the Text tool, click the page, and type the date. You can set the font size and the color. Drag the text box next to the signature.
No. The PDF and the signature stay in your browser. The signature is drawn into the file by JavaScript on your own device. Nothing is sent to us.
No. There is no page limit, no file count limit, and no daily quota. The only limit is the memory of your device. Files above 100 MB show a warning, but they still work on most computers.
Yes, it is free, and there is no account. No sign-up, no email, no watermark, and no premium tier. PDF Anvil is a KafLabs side project that exists to be useful.