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Resize Image to 100 KB
Resize Image to 100 KB Online — Free & Instant
Get an image under 100 KB — quality is searched first, and dimensions step down only when the target needs it.
About Resize Image to 100 KB
A '100 KB photo' requirement is a file-size requirement, so this page runs Transmute's target-size compression engine: a binary search over encoder quality — up to ten passes, stopping once a result lands within 5% of the ceiling — finds the best quality at or under 100 KB at your image's current dimensions. Dimensions change only when they must: if no quality level can reach the target, the image steps down in bounded increments until it fits, and the result reports the new width and height whenever that happens. You never pick output dimensions on this page — if that is what you need, the Image Resizer does exact pixels, and the two combine well: resize first, then meet the byte ceiling here. Most photos up to about 1500 px on the long side reach 100 KB on quality alone. Drop in a whole batch and the files compress in parallel across a worker pool, arriving as one ZIP. Everything runs locally in your browser — nothing is uploaded, which matters for the ID photos and application documents this limit usually applies to.
Questions
Does this change my image's dimensions?
Only when quality alone can't reach 100 KB. Most photos up to about 1500 px on the long side fit on quality alone; larger ones step down in bounded increments, and the result reports the new dimensions whenever that happens.
How is this different from the Image Resizer?
The Image Resizer targets exact pixel dimensions; this page targets a byte ceiling. They combine well: set your pixels there first, then meet the 100 KB limit here.
How accurate is the 100 KB result?
The quality search stops once it lands within 5% of the ceiling, so a large photo typically comes out between 95 and 100 KB — at or under the target, never over it when the target is reachable.
Can I process a whole folder of photos at once?
Yes — drop in multiple files and they compress in parallel, one file per worker thread, then download together as a single ZIP.
Is my file uploaded to a server?
No. Transmute processes everything locally in your browser using JavaScript and WebAssembly. Your files never leave your device — there is no server, no upload, no cloud processing.