A practical guide to reducing image file sizes for faster websites and easier sharing — without sacrificing visible quality.
Why image size matters
Images account for 50–80% of page weight on most sites. Compressing them is the single highest-impact speed fix you can make.
Lossy vs lossless
Lossy (JPG, WebP) throws away invisible data. Lossless (PNG) preserves everything. For photos use lossy. For logos use lossless.
- Photos → JPG or WebP at 75–85% quality
- Screenshots of text → PNG
- Icons → SVG when possible
- Everything else → WebP
The two-step workflow
First resize to the maximum dimensions you will display. Then compress. Resizing does far more than compression alone.
Free tools that work
Use our Image Compressor and Image Resizer — both run in your browser, no upload, no signup.