JPG vs PNG vs WebP vs AVIF: Choosing the Right Image Format
A clear guide to modern image formats. Understand the trade-offs and pick the right format for every use case.
Choosing the wrong image format can mean unnecessarily large files, quality loss, or compatibility issues. With so many formats available in 2025, here's a clear breakdown of when to use each one.
JPEG (JPG)
The classic format for photographs. JPEG uses lossy compression — it permanently discards some image data to achieve smaller file sizes. Quality is adjustable from 1 to 100, with 75-85 being the sweet spot for web use.
- Best for: photographs, complex images, print media
- Not good for: logos, text, screenshots, transparent images
- Typical size: 100KB–3MB for web photos
PNG
PNG uses lossless compression — no image data is discarded. It supports transparency (alpha channel) making it perfect for logos and UI elements. PNG files are larger than JPEG for photographs but often smaller for simple graphics.
- Best for: logos, icons, screenshots, graphics with text, images needing transparency
- Not good for: full-color photographs (files become too large)
- Supports: 8-bit and 24-bit color, full transparency
WebP
Developed by Google, WebP delivers 25-35% smaller files than JPEG at equivalent quality, and also supports transparency like PNG. Browser support is now excellent — all modern browsers support WebP.
- Best for: web images where you want JPEG-like quality at smaller sizes
- Supports: both lossy and lossless modes, transparency, animation
- Browser support: Chrome, Firefox, Safari, Edge — 96%+ of global users
Tip
WebP is now the recommended default for most web images. If your tools support it, convert your JPEG/PNG assets to WebP for immediate performance gains.
AVIF
AVIF is the newest major format. It offers 40-50% better compression than JPEG and even beats WebP. The tradeoff is slower encoding times. Browser support is growing but still not universal.
- Best for: high-quality images where file size is critical
- Slower to encode than WebP — best pre-generated, not on-the-fly
- Browser support: ~90% of users as of 2025
SVG
SVG is a vector format — it's code, not pixels. It scales infinitely with no quality loss. Essential for logos, icons, and illustrations.
Quick Reference Table
- Photo on a website → WebP (fallback to JPEG)
- Logo with transparent background → SVG or PNG
- Screenshot for documentation → PNG
- Animated image → WebP animation or GIF (for compatibility)
- Maximum compression, modern browser only → AVIF