CompressNeo
KB Target Preset Mode

Compress JPEG to 51kb

Optimize your JPEG files to fit under a 51 KB threshold. The tool will auto-adjust quality to achieve this size using client-side binary search.

Drag & drop files here, or click to browse

Supports PNG, JPG, WebP, AVIF, SVG, and GIF (static). Fully secure, runs 100% locally.

Global Presets

Set compression profile for all queued files.

Quality level 80%
Max Compress Balanced Max Quality

How CompressNeo meets the 51kb limit:

Standard compressors force you to guess the quality slider setting (e.g. 70%, 80%) repeatedly. CompressNeo replaces this tedious guessing game with an automated client-side binary search:

1. Load file onto an Offscreen Canvas in a Web Worker.
2. Check byte size at 50% quality.
3. Iterate: divide boundaries (high/low) to find the sweet spot under 51 KB.
4. Output the final file. Zero server lag, 100% private.