Compress Signature to 20 KB
Compress a signature image to 20 KB or less — a common requirement for bank account forms, government exam applications and job portals. Because signatures are simple, high-contrast images, they compress cleanly even at very small sizes.
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Supports .jpg, .jpeg, .png, .webp · Max 10 MB per file
Upload up to 10 files at once — they'll be compressed together and packed into one ZIP to download.
Why signatures compress well at small sizes
Unlike a detailed photograph, a signature is mostly flat white space with a few thin dark lines, so it holds up much better under aggressive compression than a typical photo would at the same target.
Getting the best result
Start from a well-lit, tightly cropped scan or photo on a plain background. If your form also specifies pixel dimensions, use the Signature Resizer first.
Tips for the best result
- Use a plain white or light background — busy backgrounds compress worse and look unprofessional.
- Scan in good lighting to avoid shadows that add unnecessary detail for the compressor to preserve.
Frequently Asked Questions
Why does my form want such a small signature file?+
Signature fields are typically tiny UI elements, so portals cap the file size to keep forms fast and storage costs low.
Will the signature still be legible at 20 KB?+
Yes — because signatures are simple line art rather than detailed photos, they typically stay clearly legible even at very small file sizes.
Related Tools
Compress a scanned signature image to 50 KB or less for forms and portals that accept a slightly larger file — free and private.
Resize a scanned or photographed signature to the exact pixel dimensions your form requires, free and in your browser.
Compress Image to 20 KB for free in your browser. Fast, private, no upload required. Preview before you download.