Convert JPG, PNG and WebP images to AVIF for smaller web images, with a quality slider and a free size preview. Encoding runs in your browser.
Works in your browser. What you paste or upload is processed on your device.
Choose JPG, PNG or WebP files (up to 30) or drag them onto the box.
Start with the default 60% quality. Pick a smaller long edge if the images are larger than they will be shown on your site.
Press Preview first image to see the AVIF and its file size. This is free and doesn't use your run.
Press Convert to AVIF and keep the tab open. Encoding takes a few seconds per image.
Download the .avif files or a ZIP, then upload them to your site or CMS.
AVIF is an image format built on the AV1 video codec. At the same visual quality it is usually smaller than JPG and often smaller than WebP, which makes pages load faster and can help Core Web Vitals scores such as Largest Contentful Paint. All current versions of Chrome, Edge, Firefox and Safari display AVIF.
This tool encodes your JPG, PNG or WebP images to AVIF in your browser, using the open-source libavif encoder compiled to WebAssembly and run in a background worker so the page stays responsive. Set the quality (60% by default; AVIF's scale differs from JPG's, so 50–65 is typical for the web), optionally scale images to 2048, 1600 or 1080 px, and use the free preview to encode the first image and see its exact size and look before you convert the batch. PNG transparency is kept.
Be aware: AVIF encoding is slow. Expect a few seconds per photo on a laptop and longer on a phone, so keep the tab open until the batch finishes; smaller image sizes are much faster. Converting a JPG to AVIF can't restore detail the JPG already lost. Metadata such as location isn't copied, and images above about 16.7 megapixels are scaled down to that size.
Images are usually the heaviest part of a web page. Serving AVIF instead of JPG cuts bytes without a visible drop in quality, which helps mobile visitors and page speed. Encoding in your browser means you don't need to set up a command-line encoder or upload unpublished images to a third-party service.
Something else? Ask the team
It depends on the image and the quality you choose. Photos usually come out noticeably smaller than an equivalent JPG at a similar look. Use the free preview: it encodes your first image with your settings and shows the exact file size next to the original.
AVIF's quality scale isn't the same as JPG's. Around 50–65 looks good for most web photos; go higher for detailed product shots or images with fine text, and lower for large background images. Preview the first image to compare before converting the batch.
AVIF gets its small sizes from heavy compression work, so encoding takes far longer than saving a JPG: a few seconds per photo on a laptop, longer on a phone. Choosing a smaller image size speeds it up a lot. Keep the tab open while it runs.
All current versions of Chrome, Edge, Firefox and Safari (macOS Ventura or iOS 16 and later) display AVIF. Some email clients, older devices and desktop apps don't, so for those keep a JPG fallback, for example with the HTML <picture> element.
Yes. AVIF supports transparency, and transparent areas in PNG or WebP images stay transparent in the AVIF.
No. The AVIF encoder runs in your browser. Unpublished images and client work stay on your device; our server only counts the run.
Yes, it works in modern mobile browsers, but encoding is slower on phones and big photos use a lot of memory. For large batches, a laptop or desktop is quicker, or choose a smaller image size.
You get one free run of this tool per day, and one run converts the whole batch you press the button for. After that, each run costs 5 credits (5 US cents) from a free AI Rank Lab account. The free run resets every day.
Each one opens on its own page and works straight away, with no sign-up.
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