How do I compress an image to 100 KB?

Add it here and choose the 100 KB target. The quality that fits is found automatically and reported, so you can see what the number cost before downloading.

Why is my image still over 100 KB?

Almost always because its pixel dimensions are too large. A multi-megapixel photo forced into 100 KB looks poor and often still misses. Resize to what the form needs, then compress.

Will 100 KB look blurry?

Not at the dimensions application forms ask for. At full phone-camera resolution it certainly will — the fix is resizing rather than accepting the blur.

Which format should I use for a 100 KB photo?

JPEG unless the form says otherwise, since it is universally accepted. WebP reaches the same size at higher quality but is still rejected by some older upload forms.

Is there a limit on how many images I can do?

No. Nothing is uploaded, so there is no bandwidth to meter and no daily cap to protect.

Is my photo uploaded?

No. Everything happens in your browser, including each attempt the size search makes. You can verify it in the Network tab, or by going offline after the page loads.

Compress an Image to Under 100 KB

This is the limit that appears more than any other: examination boards, job portals and government application forms settle on 100 KB with striking consistency. It is also a comfortable target, which is why the usual reason people fail it is dimensional rather than about compression.

Add the image and choose the 100 KB target. The tool searches for the quality that fits instead of asking you to guess, and shows the result first. A hundred kilobytes is the most common form limit there is, and for a correctly-sized photograph it is reachable with no visible loss at all.

Drop files here, or click to browseProcessed on your device — nothing is uploaded

Nothing uploadedRuns on your device
No limitsNo account, no watermark
No upload waitStarts immediately

Why people miss a limit this generous

A modern phone photograph is several megabytes because it is several thousand pixels wide. Asked to fit 100 KB at those dimensions, a compressor has to degrade the image severely — and the result looks poor while the file is still too large.

Reduce the dimensions to what the form asks for, and the same 100 KB becomes ample. The compressor is then describing far fewer pixels with the same budget, and the result is usually indistinguishable from the original at the size it will be displayed.

Resize to the required dimensions before compressing, every time
Check whether the form specifies a format — some accept only JPEG
Photographs belong in JPEG or WebP; PNG is the wrong tool for them
If it must be under 100 KB and look sharp, crop tighter rather than compressing harder

What the tool does that a slider does not

Every other compressor hands you a quality slider and leaves you to bisect it by hand: export, check the size, adjust, export again. That loop is the actual work, and it is what a target removes.

Here the search happens automatically — the image is encoded at several qualities to find the highest one that still fits, and the setting it landed on is reported rather than applied silently. Knowing that it reached 100 KB at quality 82 rather than quality 30 tells you immediately whether the result is worth submitting.

Nothing is uploaded to reach that number

The search for the right quality runs on your own device. Your photo is decoded in the browser, re-encoded a handful of times to find the setting that fits, and written back — no version of it, including the intermediate attempts, is ever sent anywhere.

That matters more than usual here, because size-limited uploads are overwhelmingly identity documents, application photographs and forms. You can confirm it by opening the Network tab before you start, or by disconnecting from the internet once the page has loaded and watching it work anyway.

Questions

How do I compress an image to 100 KB?: Add it here and choose the 100 KB target. The quality that fits is found automatically and reported, so you can see what the number cost before downloading.
Why is my image still over 100 KB?: Almost always because its pixel dimensions are too large. A multi-megapixel photo forced into 100 KB looks poor and often still misses. Resize to what the form needs, then compress.
Will 100 KB look blurry?: Not at the dimensions application forms ask for. At full phone-camera resolution it certainly will — the fix is resizing rather than accepting the blur.
Which format should I use for a 100 KB photo?: JPEG unless the form says otherwise, since it is universally accepted. WebP reaches the same size at higher quality but is still rejected by some older upload forms.
Is there a limit on how many images I can do?: No. Nothing is uploaded, so there is no bandwidth to meter and no daily cap to protect.
Is my photo uploaded?: No. Everything happens in your browser, including each attempt the size search makes. You can verify it in the Network tab, or by going offline after the page loads.

A different size, or no limit at all

Or use Compress Image with a quality slider instead of a target, which is the better tool when no one has given you a number to hit.