Sign PDF lets you put your signature on a PDF without printing it. Draw it with a mouse or finger, type your name in a handwriting style, or upload a photo of your signature on paper. Add initials, text, a date or a check mark and save a signed copy, all in your browser.
How to sign a PDF
- Click Choose a PDF or drop a PDF onto the page.
- Scroll to the page you want to sign and click Signature. Choose Draw, Type or Upload image, pick Blue or Black ink, and click Add to page.
- Drag the signature into place. Use the corner handle to make it bigger or smaller, and click × to remove it.
- Add anything else you need: Initials, Text, Date or ✓ Check. Each item goes onto the page you are looking at.
- Click Save signed PDF. The file is saved with
-signedadded to its name, such ascontract-signed.pdf.
Three ways to make your signature
- Draw: sign in the box with a mouse, touchpad, pen or finger. Clear starts again.
- Type: type your name and it is written in a handwriting-style font.
- Upload image: use a photo or scan of your signature on white paper. The white paper background is removed, so only the ink is placed on the page.
Electronic signature or digital signature?
| This tool (simple electronic signature) | Certificate-based digital signature | |
|---|---|---|
| What is added | An image of your signature, plus text | A cryptographic seal tied to an ID certificate |
| Proves who signed | No, it shows your mark | Yes, through the certificate issuer |
| Shows later changes | No | Yes, the seal breaks if the file changes |
| Typical use | Forms, letters, leases, everyday agreements | Contracts or filings that require a qualified or certified signature |
Tips
- Fill forms without fields. Use Text for names and addresses, and ✓ Check for tick boxes. See Fill PDF Form.
- Signing a Word file? Convert it first with Word to PDF, then sign it here.
Common problems
- The uploaded signature looks grey or has a box around it: take the photo in good light, on plain white paper, with dark ink. Shadows and off-white paper are only partly removed.
- The signature looks blurry: draw it larger in the box, or upload a sharper photo, then make it smaller on the page.
- “Add a signature, text, date or check to a page first”: nothing has been placed yet, or the text boxes are empty.
Private by design
All work happens on your device. Your PDFs are never sent to a server. You can check this yourself: see how it works.