Convert PNG to AVIF
AVIF squeezes images smaller than WebP or JPG while keeping them sharp. Convert your PNGs here to ship the lightest possible web images — all in your browser.
PNG vs AVIF: what changes
If you want the smallest image files the modern web can deliver, AVIF is the format to reach for. It routinely beats both PNG and WebP at the same visual quality, often dramatically for photographic content.
Re-encoding a heavy PNG to AVIF can cut its size by half or more while preserving transparency, since AVIF supports a full alpha channel. AVIF is supported in every current major browser, so it’s production-ready — serve it with a WebP or JPG fallback for the oldest clients. The encoding runs locally with WebAssembly, so you can experiment with the quality slider freely; note that AVIF encoding is more CPU-intensive, so large batches take a little longer.
How to convert PNG to AVIF
- Open the converterOpen the FavGrab converter from the button above.
- Drop your PNGsAdd one image or a batch of PNGs to optimise.
- Choose AVIF and tune qualitySelect AVIF, then set the slider — around 60–70 already looks excellent for web images.
- Convert & compareConvert and check the new size next to each file. AVIF encoding takes a moment longer than other formats.
PNG vs AVIF at a glance
PNG
- Compression
- Lossless — no quality loss
- Transparency
- Yes (full alpha channel)
- Compatibility
- Universal
- Best for
- Logos, screenshots, icons, line art, anything with transparency
AVIF
- Compression
- Lossy or lossless — smaller than WebP at equal quality
- Transparency
- Yes (full alpha channel)
- Compatibility
- All current browsers — patchy in older apps & editors
- Best for
- The smallest high-quality images on a modern website
When to convert PNG to AVIF
- Shipping the smallest possible high-quality web images
- Squeezing the most out of Core Web Vitals / Lighthouse
- Compressing graphics while keeping transparency
- Cutting bandwidth on an image-heavy site
Why convert in your browser
Nothing is uploaded
Every byte is decoded and re-encoded on your own machine using Canvas and WebAssembly. Your images never touch a server, so there is no upload bar, no queue, and no copy of your file sitting in someone else’s bucket.
Works offline
After the first load the converter is cached. Open it on a plane, on hotel Wi-Fi, or with the cable unplugged and it still runs at your CPU’s full speed.
Frequently asked questions
How much smaller will the AVIF be?
It varies, but AVIF often lands half the size of a PNG (or smaller) at equal visual quality, with the biggest wins on photographic content. The converter shows each file’s resulting size.
Is AVIF safe to use on my website?
Yes — every current browser supports it. For the small share of older clients, serve a WebP or JPG fallback using the <picture> element.
Does AVIF keep PNG transparency?
Yes. AVIF has a full alpha channel, so transparent PNGs convert to transparent AVIF with no background added.
Why does AVIF conversion take longer?
AVIF uses much heavier compression maths, encoded in WebAssembly in your browser. The extra few seconds per image buys a substantially smaller file.
Related converters
Want the smallest images possible?
Convert PNG to AVIF and ship featherweight files — all in your browser.
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