Image Compressor
Compress PNG, JPG, and WebP images without changing format. Privacy-preserving — runs in your browser, not on a server.
Overview
How to compress images without changing format
Shrink image file sizes while keeping the format the same. Uses MozJPEG for JPG, OxiPNG for lossless PNG optimization, and libwebp for WebP. Drop your images, choose a strength level, and download the optimized versions with per-file before/after stats. Unlike TinyPNG or similar tools, nothing uploads — your images stay on your device.
Use cases
When to compress images without changing format
- 01
Shrink screenshots before attaching them to a bug report
- 02
Optimize images for a website without changing format
- 03
Reduce the file size of camera JPGs without converting to WebP
- 04
Process a folder of PNGs through OxiPNG without the command line
Examples
Image compressor examples
10 PNG screenshots, ~500KB each → balanced compression
ex 0110 PNGs at ~200KB each, visually identical
Typical 'optimize my screenshots' workflow.
30 camera JPGs at quality 95 → balanced compression
ex 0230 JPGs at quality 82, ~40% smaller, indistinguishable to the eye
Drop the over-quality knob without changing format.
FAQ
Image compressor: common questions
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