Convert JPG to AVIF
AVIF cuts JPG sizes roughly in half at comparable quality. For image-heavy sites this is the single biggest bandwidth saver among widely supported formats. Encoding takes a little longer — the size savings are worth it.
Free · No signup · No upload — runs 100% in your browser
How to convert JPG to AVIF
- Open the converter and add your JPG files — drag & drop, paste from the clipboard, or pick a whole folder.
- Choose AVIF as the output format in the options panel and press Apply.
- Fine-tune quality or resize if you need to — files re-encode instantly.
- Download results individually, as a ZIP, or combined into a PDF.
About the formats
JPG
JPEG is the most universally supported image format in existence — every browser, app, device, and upload form accepts it. It uses lossy compression tuned for photographs. This converter encodes JPEG with MozJPEG, which squeezes out noticeably smaller files than standard encoders at the same visual quality.
AVIF
AVIF is the newest mainstream image format, built on the AV1 video codec. It produces the smallest files of any widely supported format — often half the size of JPEG at the same quality — with transparency and HDR support. Encoding is slower, but the savings are significant.
Frequently asked questions
Are my JPG files uploaded to a server?
No. The conversion runs entirely in your browser using WebAssembly codecs — your files never leave your device. After the first visit the converter even works offline.
Can I convert many files at once?
Yes — add as many files (or whole folders) as you like, convert them in one batch, and download everything as a single ZIP. There are no file-count or size limits.
Will I lose quality converting JPG to AVIF?
You stay in control: AVIF quality is adjustable in the options panel, and the defaults are tuned to be visually indistinguishable for typical images. You can re-convert with different settings instantly.