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JFIF to AVIF Converter

Convert JFIF images to AVIF right in your browser — nothing is uploaded. A .jfif saved from the web can go back to the web as a much smaller AVIF.

By Aditya Kr Sharma Files stay on your device

  • Free
  • Instant
  • No sign-up

Convert

Or import from
Supports: JPGJPEGJFIFPNG
+3 more WEBPGIFBMP

Lower quality means a smaller file and more visible compression. 92% is a good default; below about 70% the difference starts to show on photographs.

Nothing is uploaded. This tool runs entirely in your browser, so the file never leaves your device. There is no server to send it to, no copy kept anywhere, and it keeps working if you lose your connection after the page has loaded.

Accepts .jpg .jpeg .jfif .png .webp .gif .bmp You get: A .avif file Free, no sign-up

How to convert

  1. Add your files Drag them in, choose files, or use the camera.
  2. Check the settings The defaults suit most files.
  3. Download Save one file, or all of them as a ZIP.

How to convert JFIF to AVIF

  1. Drop your JFIF files on the box above, or click it to choose them (up to 30 at once).
  2. Check the settings — the quality slider trades file size against detail.
  3. Press Convert. Each file is processed on your device and shows its old and new size.
  4. Download the files one by one or take them all as a ZIP.

What changes when you convert JFIF to AVIF

  • The image is decoded and compressed again as AVIF at the quality you choose. A small loss of detail is part of lossy compression; at the default 92% it is very hard to see.
  • JFIF images have no transparency, so there is nothing to lose there.
  • Camera details and GPS location (EXIF) are not copied into the new file. Photo orientation is applied to the pixels first, so the result is the right way up.

About JFIF and AVIF files

A .jfif file is an ordinary JPEG with a different extension — Windows and some browsers save JPEG images that way. Inside, the data is the same as a .jpg.

AVIF is a newer web format built on the AV1 video codec. It compresses even better than WebP, but many editors, phones’ gallery apps and upload forms still cannot open it. It is a good choice for the smallest web images, where every visitor’s browser is current.

Limits

Up to 30 files of 25 MB each per batch and images up to 50 megapixels — beyond that browsers run out of memory, so the tool says so instead of producing a broken file. AVIF is encoded by the open-source libavif/libaom encoder compiled to WebAssembly: about 2.6 MB is downloaded from this site the first time you convert (then cached), encoding takes a few seconds per photo, and images over 16 megapixels are refused — resize them first. The quality percentage is this site’s scale mapped to AVIF’s quantiser. Files that are not images, or are damaged, are rejected with the reason.

Frequently asked questions

Are my images uploaded anywhere?

No. The conversion runs in your browser on your own device, and this page has no upload endpoint. Once the page has loaded it keeps working offline.

Is JFIF to AVIF lossless?

No — AVIF output is re-compressed, so a little detail is lost. Choose a higher quality to keep more of it.

Will an AVIF file open everywhere?

Current Chrome, Edge, Firefox and Safari (16.4 and later) show AVIF, and so do recent Android and iOS. Many photo editors, older Windows apps, upload forms and messaging apps still cannot open it — keep the original if you need to share it there.

What happens to transparency?

JFIF has no transparency, so the result is fully opaque.

How many files can I convert at once?

Up to 30 files of 25 MB each per batch, and images up to 50 megapixels. Convert them together and download each one, or take them all as a ZIP.

JFIF to JPGJFIF to PNGJFIF to WebPJFIF to GIFJFIF to BMPJFIF to ICO

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