JPEG is the world's most popular photo format. Using lossy compression, JPG can shrink photo files by up to 10x without noticeable visual change, making it the standard for digital cameras, phone galleries, and the web. However, JPG isn't always ideal — especially when you need AVIF.
AVIF brings the advantage: Most efficient format — up to 50% smaller than JPG, ideal for max loading speed.
With FORMATTO, you can convert JPG to AVIF in seconds. Everything runs 100% on your device — files are never uploaded to any server, so your privacy is guaranteed. Did you know? JPEG was invented in 1992 and remains the most widely used photo format on the internet today.
How to convert JPG to AVIF
- 1Select or drag your JPG files to the box above (batch supported).
- 2Adjust quality and size as needed, then click "Convert to AVIF".
- 3Download results one by one or together as a ZIP. Done — no signup, no upload.
Why your files are safe
100% on device
Files never leave your device.
No trace
Close the tab, data is gone.
Free
Unlimited, no watermark.
Frequently asked questions
How to convert JPG to AVIF?
Just drag your JPG files to the converter box above, pick your settings, then click convert. The AVIF result is ready to download — all processed on your device.
Is FORMATTO really free?
Yes, 100% free with unlimited conversions. Because everything runs in your browser, we have no per-conversion server cost — so it stays free forever.
Are my JPG files safe?
Very safe. Your files are processed directly on your device and never uploaded to a server. When the page is closed, no trace remains.
How many files can I convert at once?
You can process many files at once (batch). Download them individually or as a single ZIP.
Can JPG store transparency?
No. JPEG does not support transparency (alpha channel). If your image needs a transparent background, use PNG or WebP.
Does AVIF support transparency?
Yes. Unlike JPG, AVIF supports transparency (alpha channel) so empty areas stay see-through.