Compress Image to 100KB

Why compress to a fixed size like 100KB?

Many government portals, university applications, job sites, and insurance forms cap uploads at a strict maximum—often 100KB or 200KB per image. A high-resolution phone photo can be several megabytes, so you need a tool that reliably brings the file under the limit while keeping the subject recognizable.

ID photos, signatures, and document scans are common examples: the portal cares about file size and basic clarity, not gallery-level quality. Doing this locally in your browser keeps sensitive documents off third-party servers and lets you retry instantly if the first export is still too large.

Behind the scenes, hitting an exact byte budget usually means searching for the right combination of quality and sometimes dimensions. A binary search on quality—testing higher and lower values until the output sits at or just under the target—is a standard approach. You can still resize manually if the image is extreme; shrinking dimensions first makes reaching a small KB cap much easier.