Convert JFIF to AVIF
JFIF is a JPEG variant that Windows and Chrome sometimes save. It is technically the same as a JPG. Converting to AVIF is a size decision: AVIF reaches a comparable picture in a smaller file, which is why modern sites serve it. Worth knowing before you start: JFIF is already lossy, and encoding to AVIF compresses the image a second time, so the result can only lose detail, never regain it. The conversion runs entirely in your browser: there is no upload, no file size limit and no watermark on the result.
Drop your JFIF files below and download AVIF in seconds. Free, unlimited and completely private: the conversion runs inside your browser, so your files never leave your device and are never uploaded to a server.
No upload. Works with your network switched off. Check it yourself, or read what actually happens to your file.
Why convert JFIF to AVIF?
JFIF is the original container name for JPEG files, and Windows or Chrome occasionally save images with the .jfif extension. The data inside is regular JPEG, but the unusual extension confuses many apps and upload forms. Renaming sometimes works, converting guarantees a file every tool accepts.
AVIF is based on the AV1 video codec and reaches even smaller files than WebP at the same visual quality. All modern browsers can display it, but many image editors and older tools cannot open it yet, which is the main reason people convert AVIF to an older format.
JFIF vs AVIF at a glance
| JFIF | AVIF | |
|---|---|---|
| Full name | JPEG File Interchange Format | AV1 Image File Format |
| Compression | Lossy (JPEG data) | Lossy or lossless |
| Transparency | No | Yes |
| Best for | Legacy JPEG files saved by Windows or Chrome | Next generation web images |
What changes when you convert JFIF to AVIF
| What happens | |
|---|---|
| Image quality | Reduced. JFIF is already lossy and AVIF compresses again, so this is a second encode. Nothing is recovered, and at low quality settings the losses stack. |
| Transparency | JFIF has no alpha channel, so there is no transparency to lose. |
| EXIF and GPS | Removed. The conversion goes through a pixel buffer, so camera data and location are not carried into the AVIF file. |
| Colour profile | Not carried across. The image is handled in sRGB, which is right for the web and wrong for colour-managed print work. |
| Animation | Not applicable. JFIF files here are single images. |
| File size | Smaller in almost every case, which is the reason for the conversion. How much smaller depends on the picture, so no figure is quoted here. |
How to convert JFIF to AVIF
- Drop one or more JFIF files into the box above, or click to browse.
- ImageConvert converts each file to AVIF right on your device.
- Download a single file, or grab everything at once as a zip.
Frequently asked questions
What is a JFIF file?
JFIF is a JPEG variant that Windows and Chrome sometimes save. It is technically the same as a JPG.
What is an AVIF file?
AVIF is a next generation format with excellent compression, increasingly used on modern websites.
Is it free to convert JFIF to AVIF?
Yes. There are no limits, no watermarks and no account needed. Convert as many JFIF files as you like.
Are my files private?
Completely. Your JFIF files never leave your browser and are never uploaded to a server, so your images stay on your device.