The Trade-off
Every time you save an image, you are making a choice between Quality and File Size.
Lossless Compression
Lossless compression reduces file size without losing a single pixel of information. It works by identifying statistical redundancies.
- How it works: Instead of storing "Red pixel, Red pixel, Red pixel", it stores "3 Red pixels".
- Best for: Logos, diagrams, screenshots with text.
- Formats: PNG, GIF, WebP (Lossless).
Lossy Compression
Lossy compression aggressively reduces file size by discarding data that the human eye is unlikely to notice.
- How it works: It simplifies color information. For example, if two pixels are almost the same shade of blue, it might make them the exact same shade to save space.
- Best for: Photographs, complex artwork.
- Formats: JPEG, WebP, AVIF.
Which Should You Use?
For the web, Lossy is usually the winner.
A 5MB PNG photo can often be compressed to a 500KB JPEG with barely visible quality loss. That's a 90% savings in bandwidth!
Our Image Compressor tool lets you adjust the quality slider so you can find the perfect balance for your specific needs.