Convert JPG to AVIF for the smallest possible modern format — typically 40–60% smaller than the source JPG at the same visual quality. Best-in-class SSIM-tuned libavif encoder.
The output uses the same production-grade encoder pipeline as our dedicated Convert to AVIF tool: MozJPEG's trellis multipass for JPEG, oxipng at max effort for PNG, sharp-YUV libwebp for WebP, and SSIM-tuned libavif for AVIF. Files are optimized to be measurably smaller than what most online converters produce at the same quality setting.
Why convert JPG to AVIF?
Convert JPG to AVIF for the smallest possible modern format — typically 40–60% smaller than the source JPG at the same visual quality. Best-in-class SSIM-tuned libavif encoder.
Common reasons to use AVIF instead of JPG: Hero images, CDN cost reduction, Core Web Vitals.
How the conversion works
Your JPG file is decoded in your browser using WebAssembly codecs (no upload, no server processing), then re-encoded as AVIF using our production-grade encoder pipeline. The full round-trip typically completes in under a second per file on modern hardware. Nothing about your file is logged, cached, or transmitted anywhere.
Batch, privacy, and downloads
Drop up to 20 JPG files at once. Each file shows a preview, its before/after size, and a per-file download button. Hit "Download all" to get a single ZIP archive of all converted AVIF files. Filenames preserve the original name and swap the extension automatically.