JPG to AVIF Converter
Convert JPG to AVIF free — no upload, no signup
To convert JPG to AVIF, drop your JPG images into the box below, click Convert, then Download. Fylo does the work inside your browser, so nothing is uploaded and there's no signup or watermark. AVIF often comes out around half the size of the JPG with no visible difference.
Drop images here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Higher keeps more detail; lower makes smaller files.
Advanced
Leave empty to keep the original size.
How to convert JPG to AVIF
Add your JPG files
Drag and drop JPG files into the box, tap to choose them, or paste with Ctrl+V. You can add many at once.
Check the quality
Leave AVIF quality at the default 60 or adjust the slider — higher keeps more detail, lower makes smaller files.
Convert and download
Click Convert, then download each AVIF or get them all in one ZIP.
Why convert JPG to AVIF?
AVIF is the most efficient image format browsers support today. Built on the AV1 video codec, it keeps smooth gradients and skies free of the blocky artefacts JPG shows at small sizes, which makes it ideal for hero images, product galleries and photo-heavy pages where every kilobyte counts.
Does converting JPG to AVIF affect quality or size?
AVIF encoding is far more demanding than JPG, so expect a few seconds per photo — the work runs in a background thread so the page stays responsive. Quality 60 is a good default and typically gives files 40–60% smaller than the JPG. Chrome, Edge, Firefox and Safari 16+ display AVIF, but some older apps and Windows viewers can't open it yet.
What's the difference between JPG and AVIF?
JPG is the world's most common photo format. It uses lossy compression to keep photos small, but it has no transparency and loses a little detail every time it's re-saved.
AVIF is a modern format based on the AV1 video codec. It often produces files about half the size of JPG with fewer artefacts, and supports transparency and HDR.
Learn more: JPG format guide · AVIF format guide
| Property | JPG | AVIF |
|---|---|---|
| Compression | Lossy (DCT) | Lossy or lossless (AV1) |
| Transparency | No | Yes — full alpha |
| Animation | No | Yes |
| Colour depth | 24-bit (16.7 million colours) | 8, 10 or 12-bit, HDR |
| Typical size, 12 MP photo | ≈ 2–4 MB | ≈ 0.8–1.5 MB |
| Support | Universal — every browser, OS, camera and app | Chrome 85+, Firefox 93+, Safari 16+, Edge 121+ |
| Best for | Photos, social media, email, printing | Fast websites, hero images, photo galleries |
| Introduced | 1992 | 2019 |
Frequently asked questions
Why does AVIF conversion take longer than other formats?
The AV1 encoder tries many more ways of compressing each block of pixels to find the smallest result. That search costs time when saving, but nothing when viewing.
Should I use AVIF or WebP on my website?
AVIF is usually smaller; WebP encodes faster and is supported by more older tools. Many sites serve AVIF first with a WebP or JPG fallback using the HTML <picture> element.
Are my JPG files uploaded to a server?
No. Fylo converts JPG to AVIF entirely inside your browser using a background Web Worker, so your files never leave your device. That's also why it's fast — there's no upload or download wait.
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