How to convert PNG to AVIF
imglogotool.com converts PNG to AVIF using the libavif WebAssembly codec. AVIF achieves up to 50% smaller file sizes than PNG — the highest compression ratio of any modern image format. All processing runs locally in your browser.
Open the Image Converter and drop your PNG files.
Select AVIF format. Quality 70-80% gives excellent results. Note: AVIF encoding is slower than WebP (5-10 seconds for large images).
Save your AVIF files. Use with `<picture>` element for progressive enhancement.
PNG vs AVIF — detailed comparison
| PNG | AVIF | |
|---|---|---|
| Compression | Lossless only | Lossy + lossless |
| Transparency | Yes | Yes (8-bit + 10-bit HDR) |
| File size | Baseline | 50% smaller (lossy), 20% smaller (lossless) |
| Color depth | 8-bit | 8, 10, 12-bit + HDR |
| Encoding speed | Fast | Slow (AV1 codec) |
| Browser support | 100% | 93% (Chrome, Firefox, Safari 16+) |
| Best for | Lossless quality, editing | Maximum web compression, HDR photos |
When to use AVIF vs WebP
Choose AVIF when file size is the top priority and you can accept slower encoding. AVIF is 20% smaller than WebP at equivalent quality — ideal for high-traffic sites where every KB matters.
Choose WebP when you need broader browser support (97% vs 93%) and faster encoding. WebP is the safer default for most websites.
Use both with the `<picture>` element: serve AVIF to browsers that support it, WebP as fallback, JPG as final fallback.
AVIF encoding speed
AVIF uses the AV1 video codec for image compression. It produces the smallest files but encoding takes 2-10x longer than WebP or JPG. On imglogotool.com, a 1024×1024 image typically takes 3-8 seconds to encode to AVIF, compared to under 1 second for WebP.
Related conversions
PNG to WebP — faster encoding, broader browser support.
JPG to AVIF — convert photos to AVIF for maximum compression.
WebP to PNG — convert back to lossless PNG.
Frequently asked questions
How much smaller is AVIF than PNG?
AVIF lossy is approximately 50% smaller than PNG. AVIF lossless is about 20% smaller than PNG. These are the highest compression ratios of any widely-supported image format.
Does AVIF support transparency?
Yes. AVIF supports full alpha channel transparency with 8-bit, 10-bit, and 12-bit color depth — more than PNG's 8-bit limit.
Why is AVIF encoding slow?
AVIF uses the AV1 codec, which employs complex algorithms for superior compression. This trades encoding speed for smaller file sizes. Decoding (viewing) is fast.
Is AVIF supported by Safari?
Yes, Safari 16+ (released Sep 2022) supports AVIF. Combined with Chrome, Firefox, and Edge, AVIF has 93%+ global browser support.
Should I use AVIF or WebP?
Use AVIF for maximum compression on high-traffic sites. Use WebP for broader compatibility (97% vs 93%). Best practice: serve both via <picture> element.
Are my files uploaded?
No. All AVIF encoding runs locally in your browser using WebAssembly (libavif). Your images never leave your device.