WebP vs AVIF vs PNG vs JPEG: Which Image Format Should You Use?

Choosing the right image format has a direct impact on your website's speed, user experience, and SEO. With four major formats now widely supported, the decision isn't always obvious.

Format Comparison at a Glance

| Format | Type | Transparency | Animation | Best For | |--------|------|-------------|-----------|----------| | JPEG | Lossy | No | No | Photos, complex images | | PNG | Lossless | Yes | No (APNG exists) | Logos, text, transparency | | WebP | Both | Yes | Yes | General web use | | AVIF | Both | Yes | Yes | Cutting-edge performance |

JPEG: The Universal Standard

JPEG has been the dominant image format on the web for nearly 30 years. Its strength is universal compatibility — every browser, every device, every app supports JPEG.

Pros:

• Universal support (100% of browsers)
• Good compression for photographs
• Widely understood and predictable

Cons:

• No transparency support
• Larger files than modern formats
• Visible artifacts at low quality settings
• No lossless mode in practice

Use JPEG when: You need guaranteed compatibility with older systems, or you're working with photographs where file size isn't the absolute priority.

PNG: Quality at a Cost

PNG uses lossless compression, meaning the decompressed image is identical to the original. This makes it perfect for images with sharp edges, text, or transparency — but file sizes can be large.

Pros:

• Lossless quality — no compression artifacts
• Full alpha transparency
• Ideal for logos, icons, and screenshots containing text

Cons:

• Much larger files than JPEG for photographs
• No native lossy mode (use WebP or AVIF instead)
• Overkill for most photos

WebP: The Modern Workhorse

Developed by Google, WebP offers both lossy and lossless compression with significantly smaller files than JPEG and PNG.

Pros:

• 25-35% smaller than JPEG at equivalent quality
• Supports transparency (like PNG but smaller)
• Supports animation (alternative to GIF)
• 97%+ browser support as of 2026

Cons:

• Slightly slower to encode than JPEG
• Not supported in very old browsers (< 0.5% of users)

Use WebP when: You want better compression than JPEG with universal modern browser support. WebP is the safe, modern choice for almost all web images.

AVIF: The Next Generation

AVIF (AV1 Image File Format) is the newest major image format. Based on the AV1 video codec, it offers the best compression efficiency of any widely-supported format.

Pros:

• 50% smaller than JPEG at equivalent quality
• 20-30% smaller than WebP
• Supports HDR, wide color gamut, and transparency
• Excellent quality at very low file sizes

Cons:

• Slower to encode and decode
• ~93% browser support (still growing)
• Higher CPU usage during encoding

Use AVIF when: File size is your top priority and you can accept slightly lower browser coverage. Ideal for high-traffic sites where every byte matters.

Making the Right Choice

For photographs on the web: Use WebP as your primary format with JPEG fallbacks. If you're on the cutting edge, serve AVIF with WebP fallbacks.

For logos and icons: Use SVG when possible (vector graphics). If you need a raster image, use PNG for guaranteed compatibility or WebP lossless for smaller files.

For transparency: WebP handles this better than PNG in almost all cases. AVIF is even better when browser support permits.

For animations: Use WebP or AVIF instead of GIF. Both offer dramatically smaller file sizes.

The Picture Element Approach

For production websites, serve multiple formats using the <picture> element:

<picture>
  <source srcset="photo.avif" type="image/avif" />
  <source srcset="photo.webp" type="image/webp" />
  <img src="photo.jpg" alt="Description" />
</picture>

This ensures every browser gets the best format it supports while older browsers fall back to JPEG.

Try Converting Formats

Use our free image converter to test different formats and see the size differences yourself. Convert any image between JPEG, PNG, WebP, and AVIF.