Sign PDF
Add your signature image to a PDF document.
Processed in your browser — files never uploaded
Drop your PDF file here
or click to browse
Max file size: 100MB
Drop your signature image
PNG or JPG image of your signature
Max file size: 100MB
Sign PDF online, free and secure
Add your signature to a PDF and place it anywhere on the page — perfect for signing contracts, forms, and agreements without printing and scanning. Signing is handled entirely in your browser.
How to sign pdf
Upload your PDF
Select the PDF you need to sign.
Add your signature
Upload or place your signature and position it exactly where it belongs.
Download the signed PDF
Save the signed document, ready to send back.
Why use Kobra PDF to sign pdf
- Sign without printing or scanning
- Place your signature anywhere on the page
- Processed locally for confidentiality
Sign PDF — frequently asked questions
- How do I add my signature?
- Upload an image of your signature and position it on the page where it should appear, then download the signed PDF.
- Is an electronic signature legally valid?
- In many countries, electronic signatures are legally recognized for most agreements. For documents requiring certified digital signatures, check your local requirements.
- Can multiple people sign the same document?
- Yes. Each person can add their signature in turn and re-download the updated PDF.
- Is my document uploaded anywhere?
- No. Signing happens in your browser, so your contract never leaves your device.