How to Convert JPG to AVIF
JPG has been the default photo format since 1992, and it is showing its age. Compression research has moved on enormously in three decades, and AVIF is the result: the same photograph, visually indistinguishable, at roughly half the file size. For a website, that difference is the gap between a page that feels sluggish and one that loads instantly — and Google measures exactly that when ranking you.
Upload your JPGs
Drop one photo or a whole batch. Everything is encoded locally on your device - nothing is sent to a server.
Set the quality
60% is the sweet spot for most photos. AVIF holds up remarkably well at settings that would visibly damage a JPG.
Download your AVIFs
See exactly how much smaller each file became, then download individually or as a single ZIP archive.
Why AVIF Beats JPG for the Web
Images are almost always the heaviest thing on a web page — typically more than half the total bytes a visitor downloads. Every kilobyte you cut is a kilobyte that does not have to travel over a slow mobile connection before your page becomes usable, which is why image format is one of the highest-leverage performance decisions available to you.
AVIF, built on the AV1 codec from the Alliance for Open Media, brings modern video-compression techniques to still images. In practice a photo saved as AVIF at 60% quality is routinely half the size of the equivalent JPG while looking the same — and it handles gradients, skies and smooth colour transitions far better, without the blocky artifacts JPG produces in exactly those areas.
Google explicitly measures loading performance through Core Web Vitals, and Largest Contentful Paint — usually a hero image — is one of the three signals. Serving that image as AVIF instead of JPG is one of the simplest measurable improvements available. Older browsers can still be served a JPG fallback using the HTML picture element.
Common Situations This Tool Solves
A slow website weighed down by photos
If your pages carry large JPG hero images and galleries, converting them to AVIF can halve your image payload without any visible quality difference - the single fastest performance win available.
Failing Core Web Vitals
Largest Contentful Paint is usually a hero image. Cutting that file in half directly improves the metric Google uses to assess your page experience.
Serving images over slow mobile connections
Users on poor connections abandon slow pages. Halving your image sizes means the content appears in half the time, which materially affects bounce rate.
Reducing bandwidth and hosting costs
For image-heavy sites, bandwidth is a real expense. AVIF cuts the bytes served without cutting quality, and the saving compounds across every visitor.
Frequently Asked Questions
How much smaller is AVIF than JPG?
Typically around half the size at the same visual quality, and sometimes better. The exact saving depends on the image - photos with smooth gradients and skies benefit most, since those are where JPG struggles.
Does converting JPG to AVIF lose quality?
Both are lossy formats, so there is a re-encoding step. At 60% quality the result is visually indistinguishable from the source JPG while being dramatically smaller. Push the slider higher if you need certainty.
Which browsers support AVIF?
Chrome, Edge, Firefox and Safari all decode AVIF in current versions. Encoding - what this tool does - needs Chrome 106+, Edge 121+ or Firefox 128+. The page warns you if your browser cannot.
Should I use AVIF or WebP for my website?
AVIF is meaningfully smaller and is the better choice where support allows. The standard approach is to serve AVIF with a WebP or JPG fallback using the HTML picture element, so every visitor gets the best format their browser supports.
Will AVIF improve my Google ranking?
Indirectly but genuinely. Google uses Core Web Vitals as a ranking signal, and image weight is usually the dominant factor in Largest Contentful Paint. Faster images mean better scores.
What quality setting should I use?
Around 60% for most web photography. AVIF is remarkably resilient - settings that would produce visible blocking in a JPG still look clean in AVIF.
Is it safe to convert private photos here?
Yes. Encoding happens entirely inside your browser - your images are never uploaded to any server, never stored, and never seen by anyone.
Can I convert multiple JPGs at once?
Yes. Drop as many as you like - each converts separately, and Download All as ZIP bundles the whole batch.
How do I convert AVIF back to JPG?
Use our AVIF to JPG converter, which decodes AVIF back to universally compatible JPG for editing, printing or uploading anywhere.
Why won't my AVIF file open on my computer?
Browsers decode AVIF, but many desktop applications still do not. AVIF is a web delivery format - if you need to edit or print the image, keep a JPG or PNG copy.
Does AVIF work in emails?
Email clients are far behind browsers on format support, so AVIF in email is unreliable. Use JPG for email attachments and embedded images.
Is this JPG to AVIF converter really free?
Completely free, with no limits, no watermarks, no signup and no premium wall. Everything runs in your browser, so there are no server costs to pass on.
Last updated: July 11, 2026 · FlipMyFormat JPG to AVIF Converter
Written and maintained by the FlipMyFormat team