## Why Image Compression Matters
Images are often the largest assets on a webpage, accounting for 60–70% of total page weight. Unoptimized images slow down your website, hurt Core Web Vitals scores, and ultimately damage your SEO rankings.
## Lossy vs Lossless Compression
**Lossy compression** reduces file size by permanently removing some image data. JPEG uses this method. The quality reduction is usually imperceptible to the human eye at quality levels above 80%.
**Lossless compression** reduces file size without any quality loss by optimizing the file's encoding. PNG uses this approach.
## Best Practices for Web Images
1. **Use the right format**: JPG for photos, PNG for graphics with transparency, WebP for modern browsers.
2. **Set appropriate dimensions**: Never serve a 2000px image in a 400px container.
3. **Compress before uploading**: Always compress before putting images on your server.
4. **Use lazy loading**: Only load images when they scroll into view.
5. **Serve modern formats**: WebP reduces file size by 25–35% compared to JPG/PNG.
## How Our Image Compressor Works
Our browser-based image compressor uses the HTML5 Canvas API to re-encode your images at the specified quality level. Since everything happens in your browser, your images never leave your device.
## Impact on Core Web Vitals
Properly compressed images directly improve:
- **LCP (Largest Contentful Paint)**: Faster loading hero images
- **CLS (Cumulative Layout Shift)**: Add width/height attributes to prevent layout shifts
- **INP**: Faster page interactions with lighter pages
## Conclusion
Image compression is one of the highest-ROI optimizations you can make for your website. Use our free Image Compressor tool to reduce your image sizes instantly.
#image compression#web performance#core web vitals#seo#webp