Best image format for websites

JPG

JPG is still a strong default for photos because it is widely supported and can stay fairly small.

PNG

PNG works best when you need transparency or crisp graphics, but file sizes are often larger.

WebP

WebP is a strong modern option for both photos and graphics. It often beats JPG and PNG on file size.

AVIF

AVIF can produce very small files with strong quality, but support and export behavior depend more on the browser.

A simple rule

• Use JPG for photos when compatibility matters most
• Use PNG when transparency is required
• Use WebP for a strong balance of quality and size
• Use AVIF when you want more advanced compression and your workflow supports it

References

• web.dev: choose the right image format
• web.dev: image performance
• MDN: image file type and format guide