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Drop one PNG or two hundred. Batch conversion is not a paid feature here.
Convert PNG to AVIF
A site is shipping heavy PNGs and AVIF is the smallest modern format that still supports transparency.
SafeConvert engineFreeNo sign-upBatch supported
Waiting for files/Engine: on-device/Network requests made: 0
What actually changes
PNG and AVIF are not the same picture in two wrappers.
The pixels are re-encoded with AV1 intra prediction. Lossy AVIF typically lands 40 to 60 percent below a comparable WEBP and far below the PNG. Alpha is kept in both lossy and lossless modes.
Worth knowing first
AVIF encoding is slow. It is a video encoder doing a single frame, and a large image at a high effort setting can take seconds per file rather than milliseconds. Batch it in the background, not in a request path.
Questions
PNG to AVIF, answered
Should I serve AVIF or WEBP?
Both, through a picture element. AVIF is smaller, WEBP decodes faster and has a longer support tail in non-browser software.
Does lossless AVIF beat PNG?
Usually yes, but by much less than lossy AVIF does. The large wins come from allowing loss.
How to convert PNG to AVIF
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Choose your settings
AV1 Image File is lossless, so nothing is thrown away in the conversion.
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Download
Converted and deleted the moment it finishes. Never written to permanent storage.