PNG to AVIF

How it works

AVIF is the most efficient widely-supported image codec available today, and unlike JPEG it fully supports transparency — a lossy AVIF of a photographic PNG (with or without alpha) is often 70% smaller with no visible quality loss. This tool converts PNG images to AVIF directly inside your browser tab using the AV1 image codec, the same one behind the format's compression gains.

When you drop a file, Moyang reads its first bytes to confirm it's really a PNG image, then hands the bytes to a background Web Worker for decoding and AVIF encoding, preserving any transparency along the way. Encoding is genuinely CPU-intensive — large images can take a few seconds each, which is why each file shows a distinct "encoding" status rather than the instant conversions of simpler formats. Your original file is never modified, and nothing ever leaves your device.

Because everything runs locally, there's no 10-conversions-a-day limit, no 100MB cap, and no processing queue — the kind of restrictions server-based converters impose to control their hosting bill. Convert one file or fifty; once a batch is done, download every result at once as a single ZIP.

Limitations

AVIF encoding trades speed for compression — expect noticeably longer processing time than JPG/PNG/WebP conversions, especially for large batches. Flat-color graphics like icons or logos benefit far less from lossy AVIF than photographs do, and PNG may still be the better choice for those. Images over 100 megapixels aren't converted — decoding runs entirely in your browser's memory, and a file that large risks crashing the tab before it even gets to AVIF encoding.

FAQ

Is this PNG to AVIF converter really free?

Yes — completely free, with no file size limits, no daily quota, and no account required. All conversion happens in your browser, so there's no server cost to recoup.

Why is this conversion slower than the others?

AVIF encoding is genuinely CPU-intensive — the codec trades encoding speed for the smaller files and better quality it produces. A batch of large images can take several seconds each; this is expected, not a bug.

Why would I convert PNG to AVIF?

Lossy AVIF can shrink a photographic PNG dramatically compared to PNG's lossless compression, often by 70% or more, while keeping full transparency support. It's most worthwhile for photos with alpha, not flat-color graphics like icons or logos.

Is transparency preserved?

Yes. AVIF fully supports an alpha channel, so any transparent areas in the source PNG carry through to the AVIF output — nothing is composited onto a background, unlike converting to a format without transparency support.