JPG to AVIF Converter — Smaller Photo Files

AVIF Encoding Is Browser-Dependent

This converter does something most converters cannot: it encodes AVIF files entirely in your browser using your computer's processing power. But there's a critical caveat—AVIF encoding from canvas is only supported in Chromium-based browsers: Chrome, Edge, Brave, and Opera. If your browser lacks this capability, the tool immediately reports: "This browser can't export AVIF. Try Chrome/Edge for AVIF, or pick a different target format." No data leaves your device. The fix is to open this page in Chrome or Edge.

AVIF Encoding vs. AVIF Viewing—They Are Different

A common source of confusion: most modern browsers can view AVIF images perfectly well, including Safari and Firefox. But creating an AVIF file on-the-fly is a different capability. Canvas-based AVIF encoding is, for now, a Chromium-only capability. This matters for web deployment: your site visitors can almost certainly view AVIF, but if you're building the files yourself with this converter, you need Chromium to do the encoding.

AVIF encoding is also computationally intensive. Batch processing multiple large photos takes noticeably longer than converting to JPEG or WebP—the browser tab performs the work and will use CPU while the encoding runs.

Why AVIF Beats JPEG for File Size and Quality

AVIF uses a modern video-codec-derived compression algorithm, replacing JPEG's 1992 design. The payoff is substantial: AVIF reaches the same perceived quality as JPEG at a significantly smaller file size. This translates directly to faster web delivery, lower bandwidth costs, and better mobile experience.

Beyond raw file size, AVIF excels where JPEG struggles. Smooth gradients and flat-color areas render cleanly without JPEG's characteristic blocking artefacts. The quality slider spans 40–100, defaulting to 92. For web deployment, the converter suggests 75–85 for optimal file size; 90–95 is visually lossless for photographs.

For additional context on image compression trade-offs, see the JPG to WebP Converter or explore the Image Optimizer for multi-format comparisons.

What Fails and Why: Honest Limitations

The only failure mode is a browser that cannot encode AVIF from a canvas, which at present means everything outside the Chromium family. This is not a server error or a network problem; it's a hard limitation of those rendering engines' canvas implementations.

When it fails, you discover it immediately at no data cost. Advanced options offer an optional max-width resize, switched off by default and set to 1920px when you enable it, plus a filename prefix for batch organisation. There is also a background colour control, but it does nothing on this page: a JPEG source has no transparency to fill. Switching to Chrome or Edge makes the same file convert instantly.