The Ultimate Guide to Image Formats: JPG, PNG, WebP, AVIF

Choosing the right image format can dramatically affect your website's speed and your images' quality. Here's everything you need to know.

JPG (JPEG)

The most universal format, supported everywhere. JPG uses lossy compression to reduce file size significantly.

**Best for:** Photographs, complex images with many colors **Pros:** Universal support, small file sizes, adjustable quality **Cons:** No transparency, lossy compression artifacts at low quality

PNG

Designed for lossless compression with transparency support.

**Best for:** Logos, icons, screenshots, images with text **Pros:** Lossless, supports transparency, sharp text and edges **Cons:** Larger file sizes than JPG for photos

WebP

Google's modern format that combines the best of JPG and PNG.

**Best for:** Web use, replacing both JPG and PNG **Pros:** 25-35% smaller than JPG at same quality, supports transparency and animation **Cons:** Not supported in very old browsers (pre-2020)

AVIF

The newest format based on AV1 video codec. Extremely efficient.

**Best for:** Cutting-edge web applications **Pros:** 50% smaller than JPG, HDR support, transparency **Cons:** Limited software support, slower encoding

Comparison Table

When to Use What

• **Photos on a website:** WebP (primary) with JPG fallback
• **Logos and icons:** PNG or WebP with transparency
• **Animated images:** WebP (smaller than GIF)
• **Print quality:** PNG or high-quality JPG
• **Maximum compression:** AVIF (if browser support allows)

Use ConvertAI to instantly switch between any of these formats while preserving quality.