Why web developers and store owners use AVIF
Images are usually the heaviest part of a web page. Big hero photos, product galleries and blog images slow down loading, especially on mobile connections, and page speed affects both visitors and how search engines measure the user experience, including metrics like Largest Contentful Paint. AVIF is one of the most efficient image formats browsers support today: at similar visual quality it typically produces smaller files than JPG.
That's why developers, WordPress site owners, Shopify and WooCommerce merchants, and anyone running a portfolio or blog look for a way to serve AVIF. Converting your JPG photos here is a simple first step, with no plugin and no command line.
Practical examples
Optimizing the product photos of an online store before uploading them. Preparing images for a static site, a landing page or a Next.js or Astro project that uses the picture element with AVIF and a JPG fallback. Shrinking the photos in a portfolio so the gallery opens fast on phones. Or simply saving space when you archive a large set of web images.
Modern browsers like Chrome, Edge, Firefox and Safari display AVIF. Some older software and email clients don't, so keep your JPG originals for places outside the web.
Encoding takes a moment
AVIF files are light because the encoder does a lot of work to compress them. That work happens on your own device, so converting to AVIF is slower than converting to JPG or WEBP. On a computer it's usually quick; on a phone, each image can take a few seconds. For a large batch, a computer is the more comfortable option.
Try a medium quality setting first and compare the result with the original at full size. For most photos you'll find a point where the file is much lighter and the difference is hard to see.
Private and free
Your photos are converted in your browser and never uploaded, which is useful for unreleased products or client work. There's no account, no watermark and no limit. Select a whole folder of JPG files and download the AVIF versions in one ZIP. EXIF data such as the camera's GPS location is not copied into the new files.