Compress Image to 100KB Online
100KB is a classic limit on e-filing systems, HR portals, and email gateways across the world. With CompressIO you can shrink any JPEG, PNG, or WebP to exactly 100KB in seconds — entirely in your browser, with no quality guesswork.
Free · No sign-up · 100% private — works entirely in your browser
Government e-filing, HR portals, and application forms worldwide often ask for files under 100KB.
Scanned documents and certificates fit cleanly at this size with perfectly legible text.
Batch mode handles whole folders — every file returned at 100KB, free.
Frequently asked questions
Will my document still look good at 100KB?+
Yes — for on-screen use and most official submissions, 100KB keeps text crisp and photos recognizable. Print quality is the only thing that softens at this size.
Does it work on my phone?+
Yes, CompressIO works in any modern mobile browser. The processing happens on your device, so there is nothing to upload.