BriskFile

Convert JPG to AVIF

Drop your JPEG files below. They are converted on your own device and never sent anywhere.

Convert to AVIF for images on a high-traffic site where bandwidth matters, and where you can afford the encode time up front. It is converted by your own browser here, so the file is never uploaded.

Nothing is uploaded. Your files are read by this page and processed by your own processor. Open the Network tab and watch — you will not see them leave.

JPEG and AVIF, and why you would move between them

AVIF is the most efficient image format in general use, and for a website serving significant traffic the saving is real money in bandwidth as well as a faster page. A JPEG converted to AVIF is commonly 40–50% smaller with no visible difference, and AVIF handles the two things JPEG handles worst — smooth gradients and flat blocks of colour — considerably better.

The cost is encoding time. AVIF encoding is genuinely slow, seconds rather than milliseconds for a large photograph, because it is doing video-codec work on a still image. That is fine for images you encode once and serve many times, and painful for anything interactive.

Things that catch people out

  • Encoding is slow — expect several seconds per large image, and considerably longer at high effort settings. This is inherent to the format, not a limitation of the browser.
  • Serve AVIF with a fallback. A <picture> element with a WebP or JPEG source covers the software that still cannot read it.
  • At very high quality settings AVIF loses its advantage and can produce larger files than JPEG. Its strength is in the middle of the range, around quality 50–70, where it looks better than JPEG at 80.
  • Re-encoding an existing JPEG means compressing artefacts along with the image. Going straight from the original camera file gives a better result.

Related conversions

Questions

How much smaller is AVIF really?

For photographs, typically 40–50% smaller than an equivalent-looking JPEG, and 20–30% smaller than WebP. Images with large areas of flat colour or smooth gradient do better still, because AVIF does not band the way JPEG does.

Why does encoding take so long?

AVIF uses the AV1 video codec, which searches a very large space of possible encodings to find the smallest result. That search is what produces the file-size advantage, and it is expensive. Lower effort settings trade some of the saving back for speed.

What BriskFile will not do to you

  • Your files never leave your device

    Every conversion runs in your browser. Open DevTools, watch the Network tab, and you will see no upload — because there is not one.

  • No account, no email, no watermark

    Nothing to sign up for and nothing stamped on your images. There is no step between choosing a file and getting it back.

  • No limits at the download button

    No daily cap, no file counter, no "upgrade to download". If the tool starts a job, it finishes it.

  • Checkable, not just claimed

    Open the Network tab and convert something — nothing goes out. Or load the page, disconnect, and watch it keep working: the tool is already on your machine, and your file never leaves it.