JPG to AVIF converter
Convert JPG photos to AVIF for the smallest files modern browsers can display, often half the size.
Convert to
The smallest files, keeps transparency. Takes a little longer to create; newer apps only. AVIF needs WebAssembly, which this browser has turned off.
How did this tool do?
Why convert JPG photos to AVIF
AVIF is based on the AV1 video codec and compresses photos far better than JPG, often reaching the same visual quality at around half the size. For a photo-heavy website that's one of the biggest speed wins available.
Current versions of Chrome, Edge, Firefox and Safari all display AVIF. Outside the browser, support is thinner, so use AVIF for web pages and keep the JPG for sharing and printing.
AVIF takes longer to create than JPG or WebP. ImgKit runs an AVIF encoder in your browser, so a large batch can take a moment. It all happens on your device.
Where you'll meet it
Photo-heavy web pages
Portfolios, galleries and blogs where images are most of the page weight.
Hero images
The largest image on a page is often what decides how fast it feels.
Mobile visitors
Smaller images matter most on slow or metered connections.
All format conversions
How to use it
- 01Drop your images — mixed formats are fine.
- 02Choose what to convert to. For JPG, pick the colour that fills transparent areas.
- 03Tap Convert, compare any file with its original, and download one file or a ZIP.
Converting formats, answered
Is AVIF better than WebP?
It's usually smaller at the same quality, but slower to create and slightly less widely supported. WebP is the safe web default; AVIF is the smallest option.
Why does converting to AVIF take longer?
Most browsers can't encode AVIF natively, so ImgKit loads an encoder the first time and runs it on your device. AVIF's compression is also more demanding.
Will AVIF work on every device?
Current browsers display it. Some older browsers, editors and upload forms don't, so keep the original JPG for anything outside the web.
Are my images uploaded?
No. The conversion runs in your browser, so the files never leave your device and it keeps working with your connection off.