Large images slow down your site. When pages load slowly, rankings drop and users leave. Compression fixes that without destroying quality.
What compression really does
Compression reduces file size by removing redundant data. For web images, this can shrink files by 60–80% with minimal visible impact.
When to compress
- Uploading product images
- Publishing blog headers
- Exporting UI screenshots
If the file is bigger than 300 KB, compress it.
Best practices
- Keep width under 2000px for most uses
- Prefer JPEG for photos, PNG for UI with transparency
- Test a few compression levels and compare
Try it instantly
Use the CoolTool Image Compressor to shrink files in seconds.