Kodiax Compress

100% private

A free image compressor and converter: JPEG, PNG, WebP, AVIF, resizing and ZIP export. Everything happens in your browser: no image is ever sent to a server.

Drop your images here

or click to browse. You can also paste (Ctrl + V).

JPEG · PNG · WebP · AVIF · GIF · BMP · unlimited batch processing

0 image

No images yet.
Add some to start compressing.

Why compress your images?

Oversized images slow your site down, hurt your Google rankings (Core Web Vitals) and waste your visitors' bandwidth. Converting your photos to WebP or AVIF often cuts their size by 50 to 80% with no visible loss in quality.

A truly private image compressor

Unlike most online compressors, Kodiax Compress processes your images 100% locally, using your browser's own capabilities. Your photos, scanned documents or confidential visuals never leave your computer: nothing is uploaded, nothing is stored. The tool even works offline once the page has loaded.

How does it work?

  1. Drag your images into the area above (or paste them with Ctrl + V).
  2. Pick the output format (Auto, JPEG, PNG, WebP, AVIF), the quality and optional resizing.
  3. Images are recompressed live with every setting: compare the before and after, then download them one by one or as a ZIP.

A tool built for your business?

These tools are free and generic. For your business, I build software that follows your rules, and I stay on after launch.

Start a projectSee my work