About KB Target

KB Target exists because of a small, recurring frustration: online forms that reject your image for being a few kilobytes too large. A visa portal wants your photo under 20 KB. A university application wants your signature under 50 KB. A job portal wants everything under 100 KB — and every one of them rejects the file instead of fixing it for you.

Most compression tools work the other way around: they give you a quality slider and let you guess. We work backwards from your limit. You tell us the number of kilobytes you need to fit under, and the compressor searches for the highest image quality that still fits. No guessing, no repeated re-uploads, no "file too large" surprises.

Privacy comes first, not as an afterthought

The images people need to shrink are often the most sensitive ones they own: passports, ID cards, signed documents, exam photos. That's why KB Target has no upload path at all. Compression runs entirely inside your browser using WebAssembly encoders, and there is no server that receives, stores, or sees your images. Close the tab and everything is gone.

How it works

Under the hood we use open-source encoders from Google'sSquooshproject — MozJPEG, OxiPNG, and libwebp — packaged byjSquash. For a given target size, the engine performs a binary search over encoder quality (shrinking dimensions when necessary) until the output lands just under your limit.

Who makes this

KB Target is built and maintained by a one-person independent software company. It is free to use, supported by advertising once the site matures. If you have feedback or a feature request — a specific KB limit you fight with regularly, a format a portal keeps rejecting —we'd love to hear from you.