WebP vs AVIF: which one to convert to

Size

For photographs at the same visible quality, AVIF is typically 20–50 % smaller than WebP, and WebP is 25–35 % smaller than JPG. For flat graphics the gap is smaller, and lossless WebP is often the best choice.

Support

WebP: every current browser, Android, iOS, most editors. AVIF: Chrome, Firefox, Safari 16.4+, Android 12+; fewer editors and older Windows builds need an extension. If the file goes to people whose software you don't control, WebP is the safer bet; JPG safer still.

Speed and editing

AVIF encoding is several times slower than WebP. On a phone, a few hundred large photos to AVIF is a start-it-and-wait job (the queue keeps running on Android). And ConvertX can write AVIF but not read it, so AVIF is a delivery format, not a working format. Keep the originals.

Recommendation

• Website images for a modern audience: AVIF, with WebP as the fallback if your site can serve both.
• App assets, icons, transparent graphics: lossless WebP.
• Sharing with people: JPG or WebP.
• Archive: neither; keep PNG or TIFF masters.

Step by step

1. 1

   Open Image Converter

   On the Home screen, tap Image Converter.

2. 2

   Select the images

   Tap "Select image files" and pick the originals (JPG, PNG or TIFF are the best sources).

3. 3

   Choose WebP or AVIF

   Pick the target from the output format list.

4. 4

   Convert and compare

   Tap "Convert N images". The summary shows the total saved; compare a WebP batch and an AVIF batch of the same files.

Frequently asked questions