AVIF (AV1 Image File Format) is a next-generation image format based on the AV1 video codec. It offers 50% better compression than JPEG while maintaining the same visual quality, making it ideal for web images. AVIF supports transparency, HDR, and wide color gamut.

How do I convert JPEG to AVIF?

To convert JPEG to AVIF: 1) Visit lowsize.app, 2) Drag and drop your JPEG files or click to browse, 3) Adjust quality settings if needed, 4) Download your converted AVIF files. The conversion happens entirely in your browser — no upload required.

Is AVIF better than JPEG?

Yes, AVIF is significantly better than JPEG for web use. AVIF files are typically 50% smaller than JPEG at equivalent quality. AVIF also supports transparency (like PNG), HDR, and wide color gamut, which JPEG cannot do. Major browsers including Chrome, Firefox, and Safari now support AVIF.

Is this AVIF converter free?

Yes, lowsize is 100% free with no limits. There are no file size restrictions, no daily conversion limits, and no watermarks. The tool runs entirely in your browser using WebAssembly, so there are no server costs to pass on to users.

Is it safe to convert images online?

lowsize is completely safe and private. Unlike other online converters, your images never leave your device. All processing happens locally in your browser using WebAssembly technology. No files are uploaded to any server, making it the most private way to convert images.

Can I convert PNG to AVIF?

Yes, you can convert PNG to AVIF using lowsize. Simply drag and drop your PNG files onto the converter. AVIF supports transparency just like PNG, so your transparent images will be preserved. AVIF files are much smaller than PNG while maintaining quality.

How much smaller are AVIF files?

AVIF files are typically 50% smaller than JPEG and up to 30% smaller than WebP at equivalent quality. For example, a 500KB JPEG might become a 250KB AVIF with no visible quality loss. This makes AVIF ideal for improving website performance and Core Web Vitals.

Convert to AVIF

Drop your images here

or click to browse • PNG, JPEG, WebP

No upload to serverUnlimited files100% free

See the Difference

Real compression results from AVIF encoding

PNG

AVIF

-96% size

PNG to AVIF

PNG

8.2 MB

AVIF

312 KB

JPEG

AVIF

-95% size

JPEG to AVIF

JPEG

4.1 MB

AVIF

186 KB

WebP

AVIF

-95% size

WebP to AVIF

WebP

2.8 MB

AVIF

142 KB

50% Smaller

AVIF compresses better than JPEG, PNG, and WebP at the same quality

100% Private

Images never leave your device. All processing happens in your browser

Pro Quality

Converts:JPEGPNGWebPAVIF

FAQ

Is this really free?

Yes, 100% free with no limits. No file size caps, no watermarks, no daily limits. Since everything runs in your browser, there are no server costs.

Are my images uploaded anywhere?

No. Your images never leave your device. The AVIF encoder runs entirely in your browser using WebAssembly. Nothing is uploaded to any server.

Which browsers support AVIF?

Chrome 85+, Firefox 93+, Safari 16+, Edge, and Opera. That covers 93%+ of users. Use the <picture> element to provide fallbacks for older browsers.

What quality settings should I use?

Quality 60-75 is ideal for most web images. Higher effort (6-10) gives better compression but takes longer. 4:2:0 chroma is fine for photos, use 4:4:4 for graphics.

Ready to compress?

Drop your images above and download optimized AVIF files instantly.