Image Format Comparison: JPEG, PNG, WebP, AVIF, and SVG
Comprehensive comparison of image formats for the web. Understand compression algorithms, transparency support, animation capabilities, and browser compatibility to choose the right format for every use case.
Key Takeaways
- Web image formats have evolved dramatically from the JPEG/GIF/PNG era.
- JPEG: Photographs where transparency is not needed and universal support is required.
- Serve modern formats with fallbacks using the HTML `<picture>` element.
- SVG: Logos, icons, illustrations, and any graphic that must scale to arbitrary sizes.
Compress Image
Reduce image file size while keeping quality.
The Format Landscape
Web image formats have evolved dramatically from the JPEG/GIF/PNG era. Modern formats offer 25-50% better compression, but browser support varies. Choosing the right format requires balancing quality, file size, features, and compatibility.
Detailed Comparison
| Format | Compression | Transparency | Animation | Browser Support |
|---|---|---|---|---|
| JPEG | Lossy | No | No | Universal |
| PNG | Lossless | Yes (alpha) | No (APNG: partial) | Universal |
| WebP | Both | Yes | Yes | 97%+ |
| AVIF | Both | Yes | Yes | 92%+ |
| SVG | N/A (vector) | Yes | Yes (CSS/SMIL) | Universal |
| JPEG XL | Both | Yes | Yes | Chrome flag only |
When to Use Each Format
JPEG: Photographs where transparency is not needed and universal support is required. Quality 75-85 offers the best size/quality tradeoff.
PNG: Screenshots, diagrams, and images with text or sharp edges where lossy artifacts are unacceptable. Use PNG-8 for simple graphics with limited colors.
WebP: The default recommendation for most web images. Lossy WebP matches JPEG quality at 25-35% smaller file sizes. Lossless WebP is 26% smaller than PNG.
AVIF: Best compression available but slower to encode. Ideal for hero images and key visuals where encoding time is acceptable and maximum savings matter.
SVG: Logos, icons, illustrations, and any graphic that must scale to arbitrary sizes. Typically the smallest format for simple graphics and infinitely scalable.
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Serve modern formats with fallbacks using the HTML