JPG vs PNG vs WebP vs AVIF: Which Image Format Is Best?
Compare the four main web image formats: when to use JPG, PNG, WebP, or AVIF for photos, logos, and web graphics.
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JPG vs PNG vs WebP vs AVIF
The choice of image format has a real impact on file size, quality, and website performance. Here's the definitive comparison.
JPG (JPEG)
Best for: Photographs, complex images with many colors
- Compression: Lossy — reduces file size by discarding color information the eye doesn't easily see
- Transparency: No
- Quality vs size: Excellent for photos (80% quality JPG often looks indistinguishable from original at 1/5 the size)
- Browser support: 100% (since the web began)
Don't use JPG for logos, icons, screenshots, or text — the lossy compression creates visible artifacts around sharp edges.
PNG
Best for: Logos, icons, screenshots, graphics with text, images needing transparency
- Compression: Lossless — no quality loss, but larger file sizes
- Transparency: Yes (alpha channel)
- Quality vs size: Larger than JPG for photos, smaller than JPG for simple graphics
- Browser support: 100%
Don't use PNG for photographs intended for the web — a PNG photo is 3–10x larger than the equivalent JPG.
WebP
Best for: Web use, replacing both JPG and PNG
- Compression: Lossy or lossless (you choose)
- Transparency: Yes
- Quality vs size: 25–34% smaller than JPG at equivalent quality; smaller than PNG with transparency
- Browser support: 96%+ (all modern browsers; not supported in very old IE)
Use WebP when you're optimizing for web performance and don't need to support older browsers.
AVIF
Best for: Next-generation web images, HDR photos
- Compression: Lossy or lossless — typically 50% smaller than JPG at same quality
- Transparency: Yes
- Quality vs size: Best available compression
- Browser support: ~93% (Chrome, Firefox, Safari 16+; not Edge < 121)
Use AVIF when your audience is on modern browsers and you want the smallest possible file size.
Quick Decision Chart
| Situation | Use |
|---|---|
| Photo on a website | WebP (fallback JPG) |
| Logo with transparent background | WebP or PNG |
| Email attachment | JPG |
| Screenshot for documentation | PNG |
| Cutting-edge web performance | AVIF |
| Maximum compatibility | JPG (photos) / PNG (graphics) |
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Frequently asked questions
For photographs: AVIF is typically smallest (30–50% smaller than JPG at similar quality), followed by WebP (25–35% smaller), then JPG. For graphics with transparency and flat colours: WebP or AVIF edge out PNG. For maximum compatibility with oldest devices: JPG for photos, PNG for graphics.
Use WebP as your primary format — it is supported by all modern browsers (Chrome, Firefox, Safari 14+, Edge), 2–3× smaller than JPG/PNG, and supports transparency. Provide a JPG or PNG fallback for very old browsers using the HTML <picture> element. Migrate to AVIF when your target audience is primarily on modern devices.
AVIF is supported in Chrome (85+), Firefox (93+), and Safari (16+). As of 2025, approximately 90% of global web traffic comes from browsers that support AVIF. Edge cases: Internet Explorer and some older Android browsers do not support it. Use <picture> with AVIF as the primary and WebP/JPG as fallbacks.
Use JPG when you need maximum compatibility across all email clients, legacy software, or platforms that don't accept WebP/AVIF (some CMS tools, social media platforms that re-compress uploads anyway, and software from before 2015). JPG is also very fast to encode, which matters for real-time image generation.