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Compress an image to exactly 100 KB
Tell it the limit your form demands. It finds the best quality that still fits — no sliders, no guessing, no sign-up.
Use the number printed on your form.
Exam portals usually want 20–50 KB. University and job applications usually want 100 KB.
How the compression works
Most compressors give you a quality slider and leave you to guess. This one works backwards from the number you need. It encodes the image several times, narrowing in on the highest JPEG quality that still produces a file under your limit — all of it in memory, none of it sent anywhere.
If the image is so large that even the lowest usable quality overshoots, quality alone cannot save it. The tool then reduces the pixel dimensions by 20% and runs the whole search again, repeating until the file fits. That is how a 12-megapixel phone photo can still land under 20 KB when a form insists on it.
Which limit do you actually need?
- 20–50 KB — Indian government portals, SSC and UPSC exam registration, most bank KYC forms.
- 100 KB — the most common cap on university and job applications.
- 200–300 KB — visa document uploads and insurance claim portals.
- 1 MB — general web use, email attachments, forum avatars.
When a form states a limit without a unit, assume kilobytes. If it rejects a file that looks like it fits, aim about 10% below the stated number.
Common questions
Are my images uploaded to a server?
No. The work happens inside your browser. You can disconnect from the internet after this page loads and the compressor will still run — that is the simplest way to check the claim yourself.
Why is the output always a JPG?
JPEG is the only widely supported format with a continuous quality dial, which is what makes hitting an exact byte target possible. A PNG dropped here is converted to JPEG on a white background.
Will compressing to 100 KB ruin the quality?
For a document scan, an ID photo or a screenshot, 100 KB is usually plenty. For a large detailed photograph the tool has to reduce the resolution to get there, which is visible — but the result is still what the form will accept.
Can I compress several images at once?
Yes. Choose as many as you like; each is processed against the same limit and gets its own download button, keeping the original filenames.