How to Convert JPG to AVIF Online
AVIF (AV1 Image File Format) is the most efficient image format available in 2024 — files are typically 40–60% smaller than JPG at the same visual quality, and 20–30% smaller than WebP. Developed by the Alliance for Open Media (Netflix, Google, Apple, Mozilla), AVIF is now supported by all major browsers. This guide covers how to convert JPG to AVIF free, when to use AVIF vs WebP, and how to serve AVIF on your website.
Quick Answer
AVIF (AV1 Image File Format) is the most efficient image format available in 2024 — files are typically 40–60% smaller than JPG at the same visual quality, and 20–30% smaller than WebP. Developed by the Alliance for Open Media (Netflix, Google, Apple, Mozilla), AVIF is now supported by all major browsers.
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Step-by-Step Guide
4 steps · takes under 1 minute
Upload your JPG file
Open the JPG to AVIF converter and drop your JPG or JPEG file. The converter accepts any JPEG image. Requires Chrome 85+, Firefox 93+, or Safari 16+ for AVIF encoding.
Convert to AVIF
Click Convert — the browser encodes the image as AVIF using the built-in AV1 encoder. No file is uploaded anywhere.
Download the AVIF file
Download the .avif file. Compare the file size to the original JPG — it should be 40–60% smaller at equivalent quality.
Use with a JPG fallback on your website
Add the AVIF to your website using the HTML <picture> element: <source srcset='image.avif' type='image/avif'> with a WebP or JPG fallback. This ensures older browsers still see the image.
100% Private — Zero Uploads
ImgToolkit runs entirely in your browser using the Canvas API. Your images are never sent to a server, never stored in the cloud, and never seen by anyone else. This makes it safe for sensitive documents, client work, medical imagery, and confidential screenshots.
Pro tip
Use 75–85% quality for web images — you get 60–80% smaller files with no visible difference at normal screen sizes.
Format & File Size Comparison
Same 1080×1080px photo processed four ways
| Format | Quality | File Size | Notes |
|---|---|---|---|
| PNG (original) | Perfect | 4.2 MB | No compression — too large for web |
| Compressed PNG | Visually identical | 1.1 MB | −74% — transparency preserved |
| JPG (85% quality) | Excellent | 310 KB | −93% · Best for photos |
| WebP (85%)BEST | Excellent | 205 KB | −95% · Recommended for web |
Based on a 1080×1080px photo. Results vary by image content and complexity.
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Frequently Asked Questions
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