How It Works

Browser-native image compression

CompressMyImg runs entirely in your browser using the Canvas API and a binary-search algorithm to hit your exact target file size — no server uploads, no accounts required.

1. 01

   Pick your image

   Drag and drop or click to select a JPG, PNG, or WebP image from your device. The file never leaves your browser.

2. 02

   Set a target size

   Choose a preset (50 KB, 100 KB, 500 KB, 1 MB) or enter any custom target in kilobytes.

3. 03

   Binary-search compression

   The tool iteratively encodes your image at different quality levels, homing in on the quality that produces a file as close as possible to your target — without going over.

4. 04

   Download instantly

   Once done, preview the compressed image and download it with a single click. No watermarks, no sign-up.