Compressing Images for Faster Websites: A Complete Guide

By VexDocs Team Updated Dec 2025

Large images are the #1 cause of slow websites. A 5MB photo can take seconds to load on mobile data, causing users to bounce. Compressing images is the solution.

Lossy vs. Lossless Compression

Lossy compression reduces file size significantly by removing some data that the human eye can't notice. This is best for web photos.

Lossless compression shrinks files without removing any pixel data, but the savings are smaller.

How to Compress Images Free

VexDocs provides a client-side image compressor that supports JPG, PNG, and WebP formats.

Compress Images Now

Reduce file size by up to 80% without visible quality loss.

Open Image Compressor

Best Practices

  • Use WebP format when possible (it's smaller than JPG).
  • Resize images to the maximum display width (don't use a 4000px image for a 800px container).
  • Aim for under 200KB for hero images.