The signature looks faint after compressing

Increase contrast before uploading, or crop tighter so more of the frame is ink rather than background.

The form still rejects the file

Confirm the exact limit — some forms want under 10 KB or a specific pixel width. Adjust the requirements and re-run.

Task

Many application portals ask for a signature image with a small file-size cap — often between 10 KB and 20 KB, though limits vary widely.

This page uses an example preset (20 KB maximum JPG, up to 600 px wide). Your application form’s stated requirements always override these values.

Drop your file in, see what fails, and download a version that fits — the file never leaves your device.

Maximum file size: 20 KB
Accepted format: JPG
Width: up to 600 px
Example preset only: 20 KB max, JPG, up to 600 px wide — confirm limits on your form
Recommended: Sign in dark ink on white paper
Background: Plain white, cropped tight to the signature

The tool below is already set to these requirements. Drop your file in to check it and download a version that fits.

Private by design. Your files never leave your device

Drop an image here, or click to browse

HEIC, JPG, PNG, WebP

Scan or photograph your signature
Sign on white paper and scan it, or take a well-lit photo from directly above.
Crop close to the ink
Trim away extra white space so the signature fills the frame; this keeps it sharp at a small size.
Drop it into the checker below
The tool reads the size and format and shows what needs to change.
Fix and download
Click Fix it for me to get a JPG under 20 KB, then upload it to your form.

Before

Scanned signature, 1200×400 px PNG, 480 KB

After

Cropped JPG, 600×200 px, about 15 KB

The signature looks faint after compressing: Increase contrast before uploading, or crop tighter so more of the frame is ink rather than background.
The form still rejects the file: Confirm the exact limit — some forms want under 10 KB or a specific pixel width. Adjust the requirements and re-run.

Private by design. Your file is read and fixed entirely in your browser — it is never uploaded. You can verify this yourself.

Compress a photo to 50 KB maximum

Fix “file size exceeds the maximum limit”

Fix file size exceeds the maximum limit

Compress a photo that is too large to upload — the most common form rejection error.

Fix input image exceeds pixel limit

Resize when the portal rejects your photo for invalid dimensions or pixel limits.

Check any form's photo rules

Enter your form's exact KB, dimension, and format limits and fix your photo in one step.

How-to: photo too large for upload

Step-by-step guide when a form rejects your file for being over the size cap.

Tool tested 2026-07-08 · Chrome 138 / Windows 11 · JPG, PNG — Checker fix and download verified in Chrome on Windows.