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JPG to AVIF Converter

Next-gen Runs in browser

Convert JPG to AVIF for next-gen web compression — up to 50% smaller files at the same visual quality. Batch support, browser-based, no upload.

Last updated 31 Mar 2026

To convert JPG to AVIF, drop your image into the tool, set the quality level (75% is a good starting point), and click Download. AVIF uses the AV1 codec to achieve 50%+ smaller files than JPEG at equivalent visual quality — a direct improvement to your site's LCP and Core Web Vitals. All processing runs in your browser; files never leave your device.

75%
Smaller fileHigher quality

Click to upload or drag and drop

JPG, JPEG up to 50MB

Drop multiple files to convert them all at once
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How to use

  1. 1

    Open the JPG to AVIF converter

    Visit the tool on kordu.tools — no signup or installation needed.

  2. 2

    Upload your JPG file

    Click the upload area or drag and drop one or more JPG or JPEG images. Batch conversion is supported.

  3. 3

    Set quality level

    Adjust the quality slider. 75% gives excellent compression with minimal visible quality loss for most images.

  4. 4

    Preview the result

    Check the before/after comparison and see how much smaller the AVIF is.

  5. 5

    Download your AVIF

    Click Download to save the AVIF file. Batch files all download at once.

Frequently asked questions

How much smaller are AVIF files compared to JPG?
AVIF files are typically 50%+ smaller than equivalent JPEGs at the same visual quality. Results vary by image content — photographs with complex textures compress especially well.
Which browsers support AVIF?
Chrome 85+, Firefox 93+, Safari 16.4+, and Edge 121+ all support AVIF. That's over 93% of global browser users. Use the HTML picture element with a JPEG fallback for the remaining users.
Is my file uploaded to a server?
No. All conversion runs locally in your browser. Your files never leave your device.
What quality setting should I use?
For web photographs, 65–80% offers the best size-to-quality ratio. For images requiring maximum detail, use 85–95%. For hero images and LCP elements, 75% is a strong default.
Can AVIF be used on a website right now?
Yes. AVIF has over 93% browser support. Use the HTML picture element with a WebP or JPEG fallback for older browsers: <picture><source type="image/avif" srcset="image.avif"><img src="image.jpg"></picture>
Does AVIF support transparency?
Yes. AVIF supports alpha transparency, HDR, and wide colour gamuts — making it superior to both JPEG and WebP for most use cases.
Can I convert multiple JPGs to AVIF at once?
Yes. Drop multiple JPG files and download all AVIFs in a single batch.
Is AVIF better than WebP?
AVIF typically achieves 20–30% better compression than WebP at the same visual quality. However, WebP has broader browser support (including older Safari and Chrome versions).
Will converting to AVIF improve my Core Web Vitals?
Yes. Smaller image files directly reduce LCP (Largest Contentful Paint) and lower bandwidth usage. Google uses Core Web Vitals as a ranking signal.
Can I use this on a phone?
Yes. The tool works on any modern mobile browser on iPhone and Android.

Convert JPG images to AVIF — the next-generation web image format based on the

AV1 video codec. AVIF typically achieves 50%+ smaller file sizes than equivalent

JPEG images at the same visual quality. Switching to AVIF can directly improve

your website's Largest Contentful Paint (LCP) scores and Core Web Vitals.

Use the quality slider to control compression. At 75%, AVIF delivers excellent

visual quality at a fraction of the JPEG file size. For images requiring

maximum fidelity, use 85–95%. The format is supported by Chrome 85+,

Firefox 93+, Safari 16.4+, and Edge 121+ — covering over 93% of global users.

Batch conversion is fully supported — convert multiple JPGs to AVIF at once.

All processing runs client-side; your files never leave your device. Perfect

for web developers, photographers, and anyone optimising images for the modern web.

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