Resize a Signature Online

Sizing a signature correctly

Forms and documents often specify a signature size in pixels — say 300×80 — or a box it must fit inside. Upload one that's too big and it's rejected; too small and it looks pixelated. Getting the dimensions right is the difference between an accepted form and a frustrating re-upload.

This tool resizes by an exact width (the height follows automatically to keep the proportions) or fits the signature inside a maximum width and height. Because it works from the full-resolution original and trims to just the ink first, the resized signature stays as sharp as possible.

How to resize a signature

1. Open your signature. Drag a photo or scan onto the tool, choose a file, or paste it.
2. Trim to the ink. Keep auto-trim on so the size is measured from the signature itself, not the paper around it.
3. Pick a size. Choose 'Width' for an exact width, or 'Fit box' to fit inside a max width and height.
4. Download. Save at the exact size — as a transparent PNG or a JPG, as the form requires.

Resize down, not up

Shrinking a signature keeps it sharp; enlarging a small one makes it blurry. Start from the largest, clearest photo or scan you have, then resize down to the target. If you also need a file-size limit, set a target KB at the same time.