Compress image to 20 KB
Need a photo or signature under 20 KB? Get it there in one step, with the cleanest result possible at that size.
How to use it
- Choose your photo — JPG, PNG, WebP or an iPhone HEIC photo.
- It is compressed to 20 KB or less straight away, keeping as much quality as the limit allows.
- Check the result next to the original and download your JPG.
What 20 KB is used for
20 KB is one of the strictest limits you will meet. It is common for scanned signatures, thumb impressions and small profile photos on application portals.
- Scanned signatures
- Left thumb impressions
- Small profile and ID photos
- Old systems with tight upload limits
How the photo stays clear
At 20 KB a full-resolution phone photo would turn into blocks. Instead, the image is scaled down to a sensible size first and then compressed at good quality, so faces and handwriting stay sharp. If your form also needs specific dimensions, use the photo resizer to set them and limit the size in the same step.
Frequently asked questions
Is my photo uploaded?
No. Compression happens inside your browser on your own device. Your photo is never sent to a server, which matters for ID photos, signatures and documents.
Is 1 KB 1,000 or 1,024 bytes?
This tool uses 1 KB = 1,024 bytes, the way Windows and most upload forms measure file size, and always keeps the file at or below the limit — so it passes either way.
My form says 10–20 KB. Will this be too small?
The tool aims for the highest quality that fits, so the result is usually just under 20 KB — well inside a 10–20 KB range.
Can I compress a signature to 20 KB?
Yes. Photograph or scan your signature on white paper, crop it with the crop tool, then compress it here. Transparent backgrounds become white automatically.