How to sign a JPG online (free, no upload)

Sign a JPG in three steps

1. 1

   Open the JPG in the free signer

   Choose the image file (up to 25 MB) or drag it in. It loads locally and is converted on your device into a one-page PDF at the image's own size.

2. 2

   Place your signature

   Draw, type, or photograph your signature and drag it onto the document. Zoom in for precise placement on photographed pages.

3. 3

   Download the signed PDF

   The output is a flattened PDF, the standard format recipients expect for signed documents, saved straight to your device.

Why the output is a PDF, not a JPG

A signed document should be hard to edit and easy to open anywhere, and that's PDF's job: the signature is flattened into the page, page size is fixed, and every device renders it identically. Editing a JPG's pixels directly would invite quality loss and silent modification, wrapping it in a PDF keeps the source image intact underneath your signature.

If the JPG is a photo of a paper page, take it straight-on in decent light before signing: the sharper the source, the more professional the signed PDF looks.

Frequently asked questions

Is my JPG uploaded when I sign it?

No. The image is opened, wrapped into a PDF, and signed by code running in your browser, verifiable in the DevTools Network tab, or by going offline after the page loads. The signed file saves locally.

Can I sign a photo taken with my phone?

Yes, that's the most common case. Open the photo in the signer on the same phone, place your signature, and download the signed PDF. A straight-on, well-lit shot gives the cleanest result.

What if I have several JPG pages?

Each image becomes a single-page PDF, so sign and download them one at a time, or combine the photos into one PDF first with any local tool, then sign the multi-page PDF in one pass.