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JPG to AVIF converter

This JPG to AVIF converter turns JPG photos into AVIF files that are often 30 to 50 percent smaller at similar visible quality, for faster web pages.

Lower means a smaller file.

Width × height (px)

How to convert JPG to AVIF

  1. Choose or drop one or more JPG files above.
  2. Adjust quality if needed. 90% keeps excellent detail.
  3. Download each AVIF, or save them all as a ZIP.

Why convert JPG to AVIF?

AVIF is a modern image format that stores the same picture in fewer bytes than JPEG. Smaller images load faster, use less bandwidth and help your pages feel quicker, especially on phones. That is why many websites now serve AVIF where they can.

How this page makes AVIF

Browsers can show AVIF but cannot create it, so this page includes its own AVIF encoder. It downloads once from this site, about 3.5MB, and your browser keeps it. The conversion runs on your device, and nothing is uploaded. The first file takes a little longer, and large photos take longer than small ones.

Before you replace your JPGs

  • Keep your originals. Converting a JPG is a second round of lossy compression.
  • Resize oversized photos first. A 4000-pixel image is rarely needed on a web page.
  • Check that the place you upload to accepts AVIF. Many forms and older apps still need JPG.

Choosing quality

AVIF holds detail well at lower settings. Start at 70 to 80% for photos and compare the file size with the original. Use 90% for graphics with text or fine lines.

Related tools

Want a format with broader support? Try the JPG to WebP converter. If you receive AVIF files and need JPG, use AVIF to JPG. You can also start from PNG to AVIF.

Privacy, speed and file names

Every JPG file is opened and saved as AVIF inside your browser, so nothing is uploaded and conversion starts right away. Speed depends on your device, not your connection. Results are named after the original with “-tech9pros” added, so your originals are never overwritten. The AVIF encoder downloads once, about 3.5MB, and then stays cached.

Converting many files

Select up to 30 files at once and download them one by one or as a single ZIP. If you change a setting, the files are converted again with the new value, so you can try a different quality without adding them again.

If something goes wrong

If the conversion fails, reload the page and try again, or try a different browser. AVIF encoding needs a modern browser with WebAssembly.

Frequently asked questions

How much smaller is AVIF than JPG?

Often 30 to 50 percent at similar visible quality, but it depends on the picture.

Why is the first conversion slower?

Your browser downloads the AVIF encoder, about 3.5MB, the first time. After that it is cached.

Can everyone see AVIF images?

Current versions of Chrome, Edge, Firefox and Safari can. Some older apps and forms cannot, so keep a JPG copy for those cases.