Compress
Compress image to 20 KB
Prepare a small photo or signature for a 20 KB target. Check both legibility and the final dimensions before using it in a form.
Drop images here
or click to browse · JPG, PNG, WebP · multiple files supported
Images are processed on your device and never uploaded.
Options & settings
Works in your browser. No account needed.
Frequently asked questions
Can I preserve a full page at 20 KB?
Small print on a full-page scan is unlikely to remain readable at such a tight budget. Check whether the form asks for a photo, a signature or an entire document. Do not trade away required text just to satisfy the size check.
Is 20 KB guaranteed for every file?
No. The search makes a bounded number of attempts. A result that is still over the target is labelled as such, and you can still download that best-effort file. Unsupported or very large images may fail because browser memory and format support are limited.
How is the target measured?
This tool uses 1 KB = 1,024 bytes, so 20 KB means 20,480 bytes. Some upload forms use decimal KB or a strict “less than” check. Compare their exact byte limit with the result; a file that meets this target may still exceed a stricter limit.
Does reducing file size preserve the original?
The original file is not modified. The download is a newly encoded image; compression may reduce colors, detail or dimensions. It does not preserve the original EXIF metadata. Check the exported copy before sharing it.
About this tool
A signature scan and a full-page document have different needs. Blank margins can consume pixels without helping a signature, while a document may need every line. Crop only content that the recipient does not require.
A source image with many colors, paper texture or fine detail can need more aggressive compression. Compare JPG and PNG outputs: photographs often suit JPG; a few solid colors may suit PNG. PNG palette reduction can also change colors and edges.
Files are processed in this browser, without uploading the source image to ZumaTools. The site has no daily processing quota, but the memory and time available on your device limit batch size. If processing fails, try fewer files or a smaller source.
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