Compress Image to Exact KB — Free & Instant
ReduceSize.online is a free, browser-based tool that lets you compress images and PDFs to a precise file size — whether that's 10KB, 20KB, 50KB, or 100KB — directly inside your browser. Your files never leave your device, so there is no privacy risk, no waiting for uploads, and no size limits imposed by a server.
Government exam portals, job applications, and college admissions often reject files that exceed their size limits. Even 1KB over the cap means your form gets rejected. ReduceSize uses a smart binary-search compression algorithm to hit your exact target size every single time — no guessing, no manual retrying.
Why Exact KB Compression Matters
Most image compression tools reduce file size by a fixed percentage or to a rough estimate. That approach works fine for casual use, but it fails completely when you need to meet a strict file size requirement — like the ones on SSC, UPSC, Railway, or banking exam portals.
ReduceSize takes a different approach. It adjusts both image quality and dimensions together in a precise loop until your file lands exactly at or below the number you enter. The result is the highest possible image quality within your chosen size limit, delivered in seconds.