Sign a JPG or PNG and save it as a PDF
Drop an image, put your signature on it, download a PDF. The image never leaves your device, there is no account and no watermark.
Signing tool
Drop a PDF, JPG or PNG here
or
Processed on your device. No upload, no account, no limits.
Click Add signature, then click on the page where it should go. Drag to move, pull the corner to resize, press Delete to remove.
Your signed PDF is downloading
Nothing was uploaded. The file was assembled in this tab and saved straight to your device.
Need signatures from other people, reminders or a legally robust audit trail? Try SignWell (affiliate link, it costs you nothing extra).
What happens to the image
Most forms arrive as PDFs, but plenty arrive as pictures: a screenshot of an agreement, a JPG from a scanner, a PNG exported from a design tool, or a photo someone took of a paper page. SignPrivate wraps the image in a PDF page with the same proportions, lets you place your signature, date and text on it, and gives you back a PDF.
The output is a PDF rather than another image on purpose. A PDF cannot be casually edited in a photo app, it prints at the right size, it keeps the signature crisp, and it is what the person on the other end usually expects. If you really need an image back, open the PDF in any viewer and export or screenshot the page.
Supported image formats
- JPG / JPEG, including photos from phones. Orientation data is respected, so a photo taken in portrait stays in portrait.
- PNG, including screenshots and transparent images. Transparent areas become white.
- WebP, the format many sites and messaging apps hand you when you save a picture.
- HEIC from iPhones is not supported by most browsers. Share the photo as JPG instead, or take the photo with the camera format set to "Most compatible".
Steps
- Drop the image above or choose it from your device. On a phone you can pick it from the camera roll or take a new photo.
- Click Add signature and draw, type or upload your signature.
- Click on the picture where the signature should go. Drag to adjust and use the corner handle to resize. Add the date or your printed name if needed.
- Click Download signed PDF.
Size and quality
The image is embedded at a size that keeps a typical phone photo sharp while keeping the PDF reasonable in size. Very large images are scaled down to a maximum of 2500 pixels on the longest side before they are placed on the page. For a scanned document that is more than enough to read fine print.
Related: signing a scanned document covers lighting, cropping and multi-page scans in more detail.