Convert JPG to AVIF
AVIF stores a photo at a fraction of a JPG’s size with no visible loss. Convert your JPGs here for the lightest web images — locally, nothing uploaded.
JPG vs AVIF: what changes
JPG is universal but dated; for the same photo, AVIF typically produces a much smaller file at equal quality thanks to far more advanced compression.
Converting JPG → AVIF is one of the easiest wins for a faster, lighter website or a smaller photo archive. AVIF works in every current browser; pair it with a JPG fallback for maximum reach. Everything is encoded on your machine with WebAssembly, so your photos never leave the tab — note that AVIF encoding is heavier on the CPU, so big batches take a little longer to finish.
How to convert JPG to AVIF
- Open the converterOpen FavGrab from the button above.
- Drop your JPGsAdd one photo or a whole batch of JPG / JPEG files.
- Choose AVIF and tune qualitySelect AVIF and set the slider — 60–70 looks great for most photos.
- Convert & downloadConvert, check the new size, and save each AVIF or grab the set as a ZIP.
JPG vs AVIF at a glance
JPG
- Compression
- Lossy — adjustable quality
- Transparency
- No (flattens onto a background)
- Compatibility
- Universal — opens literally everywhere
- Best for
- Photographs, email attachments, uploads that must just work
AVIF
- Compression
- Lossy or lossless — smaller than WebP at equal quality
- Transparency
- Yes (full alpha channel)
- Compatibility
- All current browsers — patchy in older apps & editors
- Best for
- The smallest high-quality images on a modern website
When to convert JPG to AVIF
- Serving the lightest possible photos on a website
- Improving load times and Core Web Vitals
- Shrinking a large photo archive without visible quality loss
- Modernising an image pipeline from JPG to AVIF
Why convert in your browser
Nothing is uploaded
Every byte is decoded and re-encoded on your own machine using Canvas and WebAssembly. Your images never touch a server, so there is no upload bar, no queue, and no copy of your file sitting in someone else’s bucket.
Works offline
After the first load the converter is cached. Open it on a plane, on hotel Wi-Fi, or with the cable unplugged and it still runs at your CPU’s full speed.
Frequently asked questions
How much smaller will the AVIF be?
Often far smaller — AVIF frequently halves a JPG’s size (or more) at the same perceived quality. The converter shows each resulting file size so you can confirm.
Is AVIF production-ready?
Yes — all current browsers support it. Serve a JPG or WebP fallback via <picture> for the small remainder of older clients.
Will I lose quality?
A JPG is already lossy and AVIF re-encodes it, so there’s a small generational loss. At quality 60–70 it’s visually negligible while the file shrinks dramatically.
Why is AVIF slower to convert?
AVIF’s advanced compression is more CPU-intensive and runs in WebAssembly in your browser. The extra time per image is the trade-off for a much smaller file.
Related converters
Squeeze your photos to the limit
Convert JPG to AVIF for the smallest high-quality files — privately, in your browser.
Open the converter →