Image Format Comparison (PNG / JPG / WebP / AVIF / GIF)
Compare the most common web image formats to pick the right one for each use case.
Format comparison
Compression scheme, transparency, animation support, color depth, and browser support.
| Format | Compression | Transparency | Animation | Color depth | Browser support |
|---|---|---|---|---|---|
| PNG | Lossless | Yes (8-bit alpha) | APNG (limited) | up to 48-bit + 16-bit alpha | All browsers |
| JPEG | Lossy | No | No | 24-bit (~16.7M colors) | All browsers |
| WebP | Lossy / lossless | Yes (8-bit alpha) | Yes | 24-bit + 8-bit alpha | All major browsers (no IE) |
| AVIF | Lossy / lossless | Yes (8/10/12-bit alpha) | Yes (AVIF Sequence) | up to 12-bit HDR | Chrome / Firefox / Safari 16.4+ |
| GIF | Lossless (LZW) | 1-bit (binary) | Yes | 8-bit (256 colors) | All browsers |
File size comparison
Approximate file sizes when saving the same image in different formats. Real-world sizes vary based on content and compression settings.
| Format | Photo | Illustration | Screenshot |
|---|---|---|---|
| PNG | large | medium | medium |
| JPEG (quality 80) | small | medium–large | medium |
| WebP (quality 80) | very small | small | small |
| AVIF (quality 60) | tiny | tiny | tiny |
| GIF | not recommended | large (256-color) | large |
Format details and use cases
PNG (Portable Network Graphics)
Lossless compression with no quality degradation, plus alpha channel transparency. Ideal for logos, icons, screenshots, and text-heavy images. File sizes are larger than lossy formats for photographic content.
- Best for: logos, icons, screenshots, transparent images
- Avoid for: photographs (file size becomes unnecessarily large)
JPEG (Joint Photographic Experts Group)
Lossy compression that efficiently encodes photos and gradients. Quality is adjustable from 0–100. No transparency or animation support. Preserves Exif metadata.
- Best for: photos, natural images, gradients
- Avoid for: text/logos (compression artefacts), transparent images
WebP
Google-developed format. 25–34% smaller than JPEG and ~26% smaller than PNG. Supports lossy/lossless modes, alpha channel, and animation. Supported by all major browsers except IE.
- Best for: general web use (photos and illustrations)
- Avoid for: sites that must support IE, print workflows
AVIF (AV1 Image File Format)
Next-generation format based on the AV1 video codec. Higher compression efficiency than WebP, with HDR support. Encoding is slower, but the quality/size balance is unmatched.
- Best for: sites where compression matters, HDR imagery
- Avoid for: legacy browser support, real-time encoding
GIF (Graphics Interchange Format)
Limited to 256 colors but with long-standing animation support. Increasingly replaced by video and WebP/AVIF animations, but still common in messaging and social apps.
- Best for: short animations, legacy compatibility
- Avoid for: photos, high-quality imagery
Web development best practice
Modern websites use the <picture> element to provide multiple image formats with fallbacks.
<picture>
<source srcset="image.avif" type="image/avif">
<source srcset="image.webp" type="image/webp">
<img src="image.jpg" alt="alt text">
</picture>AVIF-capable browsers receive AVIF, WebP-capable browsers receive WebP, others fall back to JPEG. DevLab provides test image files in each format for conversion and comparison testing.