Image Compressor

How to Compress Images for Web Without Losing Quality

Large images are the #1 cause of slow websites. Learn how to compress images correctly — target file sizes, format choices, and the exact settings to use.

· 5 min read

Why Image Compression Matters

Images account for roughly 50–70% of a typical web page’s total size. Page speed affects SEO, bounce rate, mobile users, and hosting costs.

Target File Sizes

Image Type Recommended Size
Hero / banner < 300 KB
Product photo < 80 KB
Thumbnail < 30 KB

The Two Types of Compression

Lossy: Permanently removes some data. Best for photos. Typical savings: 60–80%.

Lossless: No quality loss. Best for screenshots, logos. Typical savings: 10–30%.

Step-by-Step

  1. Choose the right format (WebP for photos)
  2. Resize before compressing
  3. Set quality to 80% for most web images
  4. Use our Image Compressor to process in your browser
  5. Verify the result at 100% zoom

Common Mistakes

  • Compressing PNG photos (use JPG or WebP instead)
  • Not resizing before compressing
  • Using 100% quality "for safety" (3–5× larger with no visible difference)
  • Compressing the same image twice

Try the Image Compressor tool

No account needed · 100% private · Runs in your browser
Open Image Compressor
Image Editing BlogBack to Image Tools