20KB is very small, so fine detail softens. A full-size phone photo goes down to the tool’s lowest quality setting and is then made smaller, so expect it to look soft up close.

Yes — free, no sign-up, no watermark. Files auto-delete after 2 hours (longer for results over 2 GB or with a Pro pass).

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Compress Image to 20KB

Compress an image to 20KB online for free. Upload your photo and the tool shrinks it to fit under 20 kilobytes automatically — for the strictest form and portal upload limits. No sign-up, no watermark.

Drag & drop a file hereor click to browse from your device

What to expect

20KB is small enough that something has to give, and it is worth knowing what before you upload. A JPEG at this size cannot hold a full-resolution phone photo at good quality. The tool lowers the JPEG quality first, as far as a floor of 20, and only then shrinks the picture until it fits, so expect visible blockiness at this size.

This size band exists almost entirely because of upload forms. Government portals, exam boards and older enrolment systems often cap a photo at 20KB, a limit set when it was a sensible one and never revisited. If the form also states a required pixel size, check the result against it — some systems reject an image for being too small just as readily as for being too large.

Two things help if the output is softer than you want. Crop tightly before uploading, so every remaining pixel is spent on the subject rather than the background. And if you are compressing a scanned document rather than a photograph, convert it to greyscale first: colour information is a real share of the file, and text loses nothing without it.

When to use Compress Image to 20KB

Forms with a very strict 20KB limit
Small signature and thumbnail uploads
Portals that reject anything larger
Minimum-size photo requirements

Why use LinksConverter for this conversion

Fast cloud pipeline
Virus-scanned up to 1 GB
Deleted after 2 hours (longer for very large files or with a pass)
No sign-up, no watermark

How it works

How to Compress Image to 20KB

Upload or paste your JPG
Drop a JPG file from your device, or paste a public URL pointing to the JPG.
Click Compress Image to 20KB
Our cloud workers fetch the file, scan it for malware (video and audio over 1 GB are not scanned), and run Compress Image to 20KB.
Download your file
A download link appears as soon as it is ready; it works for anyone who has it until the file is deleted. The file is deleted from our storage two hours after it was made (longer for very large files or with a pass), normally within the next 15 minutes.