Compress image to 20 KB

Shrink your JPG or PNG to 20 KB online — free, no signup, 100% in your browser. The target is preset to 20 KB, so just upload and download.

20 KB targetJPG / PNG supportedBest for Signatures🔒 No upload
📁 Drop your image here, or click to choose (JPG / PNG)

Where a 20 KB limit is used

A 20 KB limit is most often used for signatures on online application forms and very small photos. A 20 KB target is a typical upper limit for signatures on online application forms and a common minimum for small photos. It is one of the most-requested signature sizes across web forms.

Tip for hitting 20 KB cleanly

For a signature image, aim for roughly 140×60 pixels and JPG format before compressing — the smaller pixel size plus a 20 KB target keeps the signature crisp.

⚠️ File-size rules vary between forms and change between exam cycles — always confirm the exact limit in the official notification before you upload.

Frequently asked questions

Is 20 KB enough for a signature image?
Yes. Signatures are typically capped around 20 KB and look perfectly clear at that size when signed in black ink on white paper and cropped tightly.
How do I compress an image to 20 KB?
Upload your photo above — the target is already set to 20 KB. Click Compress and the tool lowers the quality just enough to bring the file at or under 20 KB, then lets you download it. Nothing is uploaded to a server.
Will the image still be clear at 20 KB?
The tool keeps the highest quality possible while meeting the 20 KB limit. For signatures on online application forms and very small photos, 20 KB is enough to stay clear; very small targets naturally soften the image more.
Is it free and private?
Yes — completely free, no signup, no watermark, and the compression runs entirely in your browser so your file never leaves your device.

By Narender Chaudhary, Editorial & Product Lead · Updated June 2026

Need a different size?

Compress to any KB target, or resize to exact dimensions.

Image CompressorImage ResizerPassport PhotoSignature Resize