When should you use JPG, PNG, WebP, or SVG in frontend development?

Format Comparison

Format	Compression	Transparency	Animation	Best For
JPG	Lossy	❌	❌	Photos, complex color images
PNG	Lossless	✅	❌	Icons needing transparency, screenshots
WebP	Lossy / Lossless	✅	✅	General modern replacement format
SVG	Vector	✅	✅	Logos, icons, simple illustrations

JPG (JPEG)

• Pros: Small file size, great for photographic images
• Cons: Lossy compression; no transparency; artifacts at high compression
• Use for: Background images, product photos, photographs

PNG

• Pros: Lossless, supports transparency (alpha channel)
• Cons: Usually larger than JPG
• Use for: UI elements needing transparency, screenshots, text-heavy images

WebP

• Pros: ~25–35% smaller than JPG, supports transparency and animation, both lossy and lossless
• Cons: Not supported by older browsers (IE)
• Use for: Modern projects as a universal replacement for JPG and PNG

<!-- Use <picture> for graceful degradation -->
<picture>
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Example image">
</picture>

SVG

• Pros: Scalable vector — never loses quality at any size; styleable with CSS; small file size
• Cons: Not suitable for complex photographic images
• Use for: Logos, icons, illustrations, animated graphics

Recommendations

• Photos → WebP (preferred), then JPG
• Transparency needed → WebP (preferred), then PNG
• Icons / Logos → SVG
• Modern projects (no IE support needed) → Default to WebP