Sign a PDF online free without uploading it

What a browser-only signer does

DocAISign’s local signing tool opens a PDF from your device, lets you draw or type a signature and place it on any page, then builds the signed PDF in the browser for you to download. There is no upload, no account, no send credit and no watermark.

It accepts ordinary PDFs up to 20 MB and 100 pages, with up to 20 signature placements. You can drag a placement, move it with the arrow keys, change its width or remove it.

Sign it in four steps

• Open the PDF from your device or drop it onto the page.
• Add your signature by drawing it or typing your name in one of the script styles.
• Tap the page where the signature belongs; repeat for every place you need to sign.
• Prepare the signed PDF, download it and open the download to check every page.

Check for yourself that nothing is uploaded

The tool never sends the PDF or your signature to DocAISign, and its pages are served with a content security policy that blocks the page’s scripts from opening network connections such as fetch or XHR uploads. You can confirm it in your browser’s developer tools: open the Network panel, then open and sign a PDF, and no request carrying the document appears.

Loading the page itself still makes ordinary requests for the page, styles and scripts. Closing the tab clears the in-memory copy; the signature is not remembered for next time.

What it does not do

A local signature is an image placed on your own copy. The tool does not send the PDF to anyone, collect another person’s signature, add a date field or create an audit record, and it is not a certificate-based digital signature.

Password-protected PDFs, XFA forms and PDFs that already contain signature fields are not supported, so an existing digital signature is not overwritten by accident. The original file on your device is never changed.

When to use a signing request instead

If someone else must sign, or you want a record of who signed and when, use the standard workflow: upload the PDF, place boxes for you and one recipient and send a private link. Both sides receive the signed PDF and an audit record with SHA-256 fingerprints. That workflow stores the file on the server until its retention period ends.

Before you share the signed file

Open the downloaded PDF in a second viewer, read every page and check the signature is where you meant it. Keep the unsigned original separately. If the file is too large to email, try lossless compression before sending.