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Explainer2026/04/23

WebP vs PNG vs JPG: Which Image Format Should You Use?

A clear breakdown of WebP, PNG, and JPG — when to use each, what the tradeoffs are, and how to convert between them for free.

JPG, PNG, and WebP are the three most common image formats on the web, but they're not interchangeable. Picking the wrong one can mean bloated file sizes, missing transparency support, or quality loss where it matters. Here's when to use each.

Quick Comparison

JPGPNGWebP
CompressionLossyLosslessBoth
TransparencyNoYesYes
Best forPhotosScreenshots, logosWeb images
Browser supportUniversalUniversalModern browsers
Typical file sizeSmallLargeSmallest

JPG: Best for Photos

JPG (also written JPEG) uses lossy compression — it discards some image data to produce smaller files. For photographs with lots of color variation, this tradeoff is barely noticeable and the size savings are significant.

Use JPG for:

  • Digital photos and product images
  • Any image where file size matters more than pixel-perfect accuracy
  • Email attachments and social media uploads

Avoid JPG for:

  • Screenshots, diagrams, or images with sharp text (compression artifacts become visible on hard edges)
  • Logos and icons
  • Images that need a transparent background

PNG: Best for Graphics and Transparency

PNG uses lossless compression — no data is thrown away. What you save is what you get back, making it ideal for images where sharpness matters. It also supports full alpha transparency.

Use PNG for:

  • Logos, icons, and UI screenshots
  • Images with text or fine lines
  • Anything that needs a transparent background

Avoid PNG for:

  • Large photographs (file sizes can be 5–10× larger than JPG for the same image)

WebP: The Modern Default for the Web

WebP was developed by Google to replace both JPG and PNG for web use. It achieves smaller file sizes than both — roughly 25–35% smaller than JPG at the same quality — while also supporting transparency.

Use WebP for:

  • Web images where page load speed matters
  • Images served via a CDN
  • Any modern site targeting current browsers

Avoid WebP for:

  • Files that need to open in older apps or tools that don't support WebP
  • Sharing outside web contexts where compatibility is uncertain

Converting Between Formats

All conversions happen in your browser — no upload required:

  • JPG to WebP — reduce file size for web
  • PNG to WebP — modern format with transparency support
  • WebP to JPG — convert back for maximum compatibility
  • WebP to PNG — preserve transparency when converting away from WebP
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