How to compress images without losing quality

Image compression comes in two flavours. Lossless compression removes redundant data without changing a single pixel — great for logos and screenshots. Lossy compression discards detail the human eye barely notices, achieving far smaller files — ideal for photos.

The Compress Image tool lets you pick a quality level so you can trade size against fidelity and preview the result before downloading.

Use WebP for the web — it is typically 25–35% smaller than JPG at the same quality.

Resize before you compress: a 4000px photo displayed at 800px is wasting bandwidth. Use the Resize Image tool first.

For transparency, prefer PNG or WebP; JPG has no alpha channel.

This tool processes images entirely on your device using the Canvas API. Nothing is uploaded — your photos never leave your computer, which makes it both private and instant.