How to sign a PDF
- Select Choose file or drop your PDF on the box.
- Make your signature. Draw it with a mouse, finger or pen, Type your name in one of three script styles, or Upload an image of your handwriting. Select Use this signature.
- Go to the page you want. Drag the signature into place, or focus it and use the arrow keys. Change its size with the slider.
- Choose where to sign: this page, every page, the first or the last.
- Select Sign PDF, then Download. The new file ends in
-signed.
Electronic signature, not a certified one
This tool puts a picture of your signature on the page. That is called an electronic signature, and it is enough for many forms, letters and informal contracts. It is not a certified digital signature. It has no certificate, it does not prove your identity, and it cannot detect later edits. If a law, bank or contract requires a qualified signature, use a service that provides one.
Making a good signature
- Draw: sign slowly on a big screen. Use Clear and try again until it looks like yours.
- Type: pick the style you like. The name is drawn on your device, so it works offline.
- Upload: sign on white paper with a dark pen, photograph it in good light and upload it. The white background is removed so only the ink remains.
Placing it well
The preview shows the page at a fixed size. Your position is saved as a share of the page width and height, so it lands in the same place whatever the paper size. Pages with different sizes or a rotation are handled for you. Check the preview once more before you save.
Tips
- Finish forms first, then sign, then use Flatten PDF so nothing can be moved.
- Mark drafts with Watermark PDF before sending them for review.
- Lock the signed file with Protect PDF.
- Several signers? Sign, download, and let the next person sign the new file.
The page previews and the signing run on your device with pdf.js and pdf-lib. The three script fonts are bundled with the site under the SIL Open Font License.