PNG to AVIF
Convert a PNG image to the AVIF format for dramatically smaller file sizes with the same visual quality.
How it works
- 1
Drop your PNG file onto the upload area and adjust the quality slider. A value of 50 balances file size and detail well.
- 2
Click Convert — the AVIF encoder runs entirely in your browser using a compact WASM codec. Larger images take longer; a progress message keeps you informed.
- 3
When encoding finishes, download the AVIF file. Compare the size to the original PNG — savings of 50–80 % are common.
Questions
Why does encoding take so long?
AVIF uses the AV1 video codec under the hood, which is computationally demanding. Encoding a large PNG can take several seconds even on a fast machine. The first run also loads a small WASM file; subsequent conversions skip that step.
What quality should I use?
50 is a sensible default that usually looks very close to the original at a fraction of the size. Go higher (70–80) when the image contains fine detail or text. Go lower (20–40) when file size is the main concern and the image is mostly flat colour or blurry backgrounds.
Does this tool keep the image's transparency?
Yes. AVIF supports an alpha channel, so transparent areas in your PNG are preserved in the output.
Will the PNG file be sent anywhere?
No. The conversion runs entirely in your browser; your file never leaves your device. The WASM encoder is served from this site and does not send any data externally.
Which browsers can open AVIF files?
Chrome, Firefox, Edge, and Safari (macOS 13+) all support AVIF. Older browsers and some apps may not recognise the format yet.
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