Transparency is kept
AVIF and PNG both support alpha transparency, so cut-outs, stickers and logos keep their clear background. The row reports what share of each image is transparent after conversion.
This is the main reason to choose PNG over JPG here: JPG would have to fill those areas with a colour.
The PNG will be very large
AVIF is one of the most efficient image formats, and PNG is lossless, so the jump in size is dramatic. In our tests a 1204×800 AVIF of 80,743 bytes became a 1,780,081-byte PNG (22 times larger), and a 722×1024 AVIF went from 85,445 to 1,505,880 bytes (17.6 times).
If the PNG is too large for its purpose, reduce the dimensions with Max width under Resize, or use AVIF to JPG when you do not need transparency.
10-bit and HDR become 8-bit
PNG can hold 16 bits per channel, but a browser canvas writes 8. A 10-bit or HDR AVIF is converted to 8-bit sRGB, so smooth gradients may show slight banding and bright highlights can look flatter.
When PNG is the right target
- Editing in apps that cannot open AVIF, without adding another lossy step.
- Graphics with transparency for slides, documents or design tools.
- Archiving a lossless copy of an image you received as AVIF.
AVIF won’t open, animation and colour shifts
- “Cannot open AVIF”: the browser lacks an AVIF decoder (typically Safari 16.3 or older). Use Safari 16.4+ or a current Chrome, Edge or Firefox.
- Animated AVIF: only the first frame is converted, and the row says so.
- Colours look different from the original: HDR tone mapping and conversion to sRGB change bright and saturated areas.