JPG to AVIF Converter
Convert JPG — the format everything can open — into AVIF, a modern format with very small file sizes. Runs entirely in your browser.
Why convert JPG to AVIF?
The reason is nearly always page weight. Swapping JPEG for AVIF on a photo-heavy page routinely halves the bytes at the same visual quality, and every current browser can display it — which is why it has become the default choice for new image pipelines.
What changes when JPG becomes AVIF
Quality 55, low effort, and a noticeable wait on large photographs. This is a second lossy generation on top of the JPEG, so treat the AVIF as an output for serving rather than as a master. EXIF and colour profile carry through.
Why this one is different
Every other JPG to AVIF converter uploads your files to their server, which is why they cap file sizes and ask you to sign up. This one does the work on your own machine, so it can afford not to.
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Questions
How do I convert JPG to AVIF?
Drop your JPG files onto the box above and each one is converted to AVIF straight away. Then download the results, individually or together as a ZIP. There is no upload step and no account.
Quality 55 sounds low.
AVIF's scale is not JPEG's. Somewhere around 50 to 60 is where AVIF is generally considered visually transparent for photographs; the same number on a JPEG would look poor.
Will it work in email or on the desktop?
Not reliably. AVIF is a web format first, and mail clients and older desktop software often cannot display it. JPG remains the right choice for anything sent as an attachment.
Do my files get uploaded anywhere?
No. Everything happens in this tab. Your files are never sent to a server, which is why this still works if you disconnect from the network after the page has loaded.