How to Compress a JPEG to a Specific File Size

Need a JPEG at an exact KB size? Skip the quality-slider guesswork — target the file size directly, free and in your browser.

The problem with quality sliders

Traditional editors ask you to pick a quality percentage and only reveal the resulting file size after you export. When you need a precise KB figure, that means exporting again and again until you get lucky.

Target the size directly

This tool works the other way around: you enter the exact KB you need, and it automatically searches for the highest quality that fits — then downscales if a very small target demands it.

How the search works

1. The tool tests JPEG quality levels using a binary search to converge quickly.
2. It keeps the best quality whose file stays at or under your target.
3. If even the lowest quality is too big, it reduces the dimensions and retries.
4. You get the smallest, best-looking JPEG that meets your size.