AVIF Converter
Convert images to AVIF, or decode an AVIF back to PNG, JPG, or WebP.
A free online AVIF converter — drop in a PNG, JPG, or WebP to encode it as AVIF, or drop in an existing .avif file to decode it back to a more common format. No signup, everything runs in your browser. AVIF encoding support varies by browser — this tool tells you plainly if yours can't.
What is AVIF, and when should you use it?
AVIF (AV1 Image File Format) is a modern image format built on the AV1 video codec. It typically produces the smallest files of any common web image format at a given visual quality — often smaller than WebP and dramatically smaller than JPEG or PNG — while still supporting transparency, wide color gamut, and both lossy and lossless compression. It's best suited for photos and complex images on pages where every kilobyte of load time matters, such as hero images and product galleries. The catch is browser support: decoding (viewing) AVIF images is now solid across modern browsers, but encoding a new AVIF file directly in the browser is still inconsistent, which is why this tool checks for that support before promising a result.
Browser support is honest, not assumed
This tool actively tests whether your browser can encode AVIF before letting you convert to it — it doesn't just assume support and hope for the best. If your browser can't produce AVIF files, you'll see a clear message instead of a broken or mislabeled download. As of today, the latest Chrome and Edge on desktop have the most consistent AVIF encoding support; Firefox and Safari support varies by version. Decoding an AVIF file you already have — converting it to PNG, JPG, or WebP — works more reliably across modern Chromium, Firefox, and recent Safari.
Choosing a quality setting
Like WebP and JPEG, AVIF uses lossy compression by default, so there's a direct trade-off between file size and visual fidelity. The tool shows the resulting file size live as you move the Quality slider — for photos, 60-75% quality is usually a good starting point, since AVIF's compression is efficient enough that even moderate settings look close to lossless.
Converting an AVIF you already have
If you upload a file that's already AVIF, the tool automatically switches to decode mode — pick PNG (lossless, keeps transparency), JPG (smaller, no transparency), or WebP as your output format. This is useful if you received an AVIF from somewhere and need a more widely-compatible format for an older tool or platform.
Frequently asked questions
How do I convert an image to AVIF?
Upload or drag in a PNG, JPG, or WebP. If your browser supports AVIF encoding, the tool converts it immediately and shows the original and new file sizes side by side — adjust the Quality slider to trade off file size against visual quality, then click Download AVIF.
Does every browser support converting to AVIF?
No. AVIF decoding — viewing and converting an existing .avif file back to PNG, JPG, or WebP — is well supported in modern Chrome, Firefox, and Safari. AVIF encoding — producing a new .avif file — is not reliably supported in every browser yet. This tool detects support automatically and tells you plainly if your browser can't encode AVIF, instead of silently failing. The latest Chrome or Edge on desktop currently offers the most consistent AVIF encoding support.
Can I convert an AVIF file to PNG, JPG, or WebP?
Yes. Upload an .avif file and the tool switches to decode mode automatically — pick PNG, JPG, or WebP as the output format, adjust quality if applicable, and download.
Why use AVIF instead of WebP or JPEG?
AVIF typically produces smaller files than WebP or JPEG at a comparable visual quality, especially for photos, while still supporting transparency and wide color. The tradeoff is browser encoding support, which is newer and less universal than WebP's.
Is my image uploaded anywhere?
No. The conversion happens locally in your browser using a canvas — your image never leaves your device, and nothing is stored on a server.
Related tools: PNG to WebP · JPG to PNG · PNG to JPG
