JPG to AVIF converter
Turn JPG photos into AVIF images that are often half the size at the same visual quality. Converted on your device in seconds; nothing is uploaded.
Drop your images here
JPG, PNG, WebP, AVIF, HEIC and GIF, up to 100 MB each
How it works
Convert in three steps
- 1
Drop your JPG images in, or choose them from your device.
- 2
Graviton converts them to AVIF right in your browser.
- 3
Download each AVIF, or all of them as one ZIP.
Why convert JPG to AVIF?
JPG opens everywhere and suits photos, but it has no transparency. AVIF is the newest web format and is often half the size of a JPG, but support outside web browsers is still patchy.
What happens to quality?
Photos are encoded with libavif at a quality that matches a high-quality JPG on screen. AVIF encoding takes longer than JPG, especially for large photos.
Frequently asked questions
Should I use AVIF or WebP on my site?
AVIF is usually smaller; WebP encodes faster and is supported slightly more widely. Many sites serve AVIF with a WebP or JPG fallback.
Are my images uploaded?
No. Graviton converts and compresses inside your browser, so your images never leave your device. Nothing is sent while you compress. When you download, the browser sends only a one-way fingerprint of the image, so the download can be counted and approved. Graviton stores none of it.
Can I process many images at once?
Yes. Drop up to 250 images at once and download them one by one or together as a ZIP that keeps the original file names. On Free, each image counts once a day against your 3 downloads; Pro has no daily limit, so the whole batch downloads at once.
Is it free?
Yes. Compressing and converting are free and unlimited, with no account needed. Downloading needs a free account, which includes 3 downloads a day with every format and setting. Pro removes the daily limit.