JPG to AVIF converter
This makes an AVIF out of the JPG you already have. AVIF is the smallest way to put a photo on a web page today, often around half the size of a JPG that looks the same. Your file never leaves your computer.
Need the other direction? Convert AVIF to JPG
How to convert JPG to AVIF
- 1 Drop your JPG .jpg or .jpeg or .jpe file onto the page, or click to browse for it.
- 2 Set the quality, or leave the default, which keeps the file small without anything showing.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the AVIF, or add more files and do the whole set in one go.
Why convert JPG to AVIF
- Best size-to-quality ratio of any widely supported still format.
- Handles transparency and very bright, very colourful photographs.
- Image CDNs serving modern browsers with a JPEG fallback.
- JPG: visible blocking and ringing artefacts around sharp edges and text.
JPG compared with AVIF
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | JPG | AVIF |
|---|---|---|
| File extension | .jpg | .avif |
| Compression | Lossy | Lossy or lossless |
| Transparency | No | Yes |
| Animation | No | Yes |
| Colour depth | 8 bits per channel, 24-bit colour | Up to 12 bits per channel, HDR and wide gamut |
| Typical file size | Smaller | Depends on mode |
| Browser support | Every browser | All current browsers |
| Introduced | 1992 | 2019 |
| Developed by | Joint Photographic Experts Group | Alliance for Open Media |
Quality and what changes
AVIF stores the same content under a different set of rules, so what matters here is compatibility rather than picture quality. Convert once from the best source you have rather than through a chain of intermediate files.
- One AVIF limitation to keep in mind: poor support in desktop image editors and older operating systems.
Questions about JPG to AVIF
Does converting to AVIF add transparency?
It makes transparency possible but it cannot invent it. There is nothing see-through in a JPG to recover, so the background stays exactly as solid as it was. Removing a background is a separate editing step.
Is my JPG file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your JPG is read straight from your own disk, converted on your machine and handed back as an AVIF. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several JPG files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate AVIF downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.