How to Compress Images for the Web (Faster Pages, Free)
Updated 2026-06-01
Large images are the number-one cause of slow web pages. Compressing them improves load time, Core Web Vitals, and SEO. This guide shows a simple, private workflow — all in your browser.
Step 1: Resize to the size you actually display
There is no point serving a 4000px photo in a 800px slot. Use the Image Resizer to scale images down to their display width first — this alone can cut file size dramatically.
Step 2: Compress
Run the image through the Image Compressor. Adjust the quality slider until the preview still looks good; 70–80% is usually a great balance.
Step 3: Use a modern format
WebP typically produces 25–35% smaller files than JPG at similar quality, and all modern browsers support it. Convert your final images with the Image to WebP tool.
Doing it in bulk
Have a whole folder? The Bulk Image Converter converts many images to WebP, JPG, or PNG at once and downloads them as a ZIP.
Why browser-based?
Your images are processed on your device — nothing is uploaded — so the workflow is private and instant.
Frequently asked questions
How small should images be? Aim for under ~200 KB for most web images; hero images can be larger if optimized.
Will compression ruin quality? Not at sensible levels. Use the preview to find the sweet spot before downloading.