Convert PNG to AVIF
Runs locally in your browser. Nothing leaves your device.Convert static PNG files to AVIF locally in your browser with quality control, lossless mode, and transparency.
Transparency is preserved. Metadata and color profiles are not copied.
Compression mode
Higher usually means better fidelity, but does not guarantee a specific file size.
Selected files
0 / 20
Drop PNG files here
How it works
- 1
Add PNG files
Drop up to 20 static PNG files, each up to 100 MiB.
- 2
Choose the compression mode and quality
Choose lossless or lossy, the quality, and the compression effort.
- 3
Download the AVIF files
Download the converted files individually or bundled as a ZIP.
Good to know
The PNG to AVIF converter runs a real libavif/libaom encoder in a Web Worker directly in your browser, rather than the simple canvas conversion other format converters use. You can choose a lossless mode that keeps the normalized 8-bit raster without further pixel loss, or a lossy mode for significantly smaller files with transparency preserved.
Besides quality, the compression effort can be chosen between Fast, Balanced, and Smallest file. 16-bit PNGs are reduced to 8 bits per channel, animated PNG files are not yet supported, and automatic website preparation caches application resources for offline use, never selected images.
Typical use cases
Check lossless archiving with a smaller file size
Use the lossless mode when every pixel must be preserved — note that the AVIF file can end up larger than the original PNG.
Strongly compress large PNG graphics for the web
Choose the lossy mode with a suitable quality to significantly shrink transparent graphics without losing transparency.
Tips for better results
Match compression effort to waiting time
“Fast” delivers a result quickly, “Smallest file” takes longer but compresses more efficiently — “Balanced” is a good middle ground.
Check 16-bit PNGs beforehand
16-bit PNGs are reduced to 8 bits per channel — this can become visible in images with very fine color gradients.
Features
Lossless or lossy
Choose between exact pixel preservation and a significantly smaller, compressed file.
Real AVIF encoder in a worker
A libavif/libaom encoder runs in a Web Worker for faithful AVIF compression.
Offline preparation without images
The website automatically prepares all tools for offline use and caches only application resources, never selected images.
Frequently asked questions
Are animated PNG files supported?
No, animated PNG files are not yet supported — only static PNGs can be converted.
Are my images uploaded?
No. Compression runs entirely locally in the browser via a Web Worker.
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