Online forms keep getting stricter about file size. Recruiters ask for a headshot under 50 KB, universities want transcripts scans below 100 KB, and government portals reject anything over an invisible threshold that only reveals itself after a failed upload. When you need to decrease image size in KB, the usual advice — open a desktop editor, fiddle with export quality, save, check, repeat — wastes minutes per attempt and often still misses the limit.
This page removes the guesswork. Drop your picture into the tool above and choose the exact number of kilobytes you need. The compressor then performs a binary search over JPEG quality values, zeroing in on the highest quality that still lands at or under your target. You watch the before-and-after comparison — original size versus new size, original dimensions versus new dimensions — and download the result with one click.
Privacy is the second reason people choose a browser-based tool. Nothing you load here is transmitted anywhere. The image is decoded, re-encoded, and handed back to you entirely within your own browser tab. That makes it safe for passports, national ID cards, medical documents, tax paperwork, and any other file you would rather not hand to an unknown server in exchange for a few hundred kilobytes of savings.
If your target is very aggressive — 10 or 20 KB for a photo that started life at several megabytes — enable the resizing option. The tool will then reduce pixel dimensions step by step until your file fits, which is exactly what tiny avatar and signature uploads usually require. Leave resizing off and the tool keeps your original dimensions, telling you plainly when a target is below the achievable minimum rather than pretending it succeeded.
There is no queue, no registration, no watermark, and no cap on how many images you can process. It works the same on Android and iPhone browsers as on a laptop, so the fix is always one bookmark away. The next time a form insists on a kilobyte ceiling, decrease your image size here first and upload with confidence.