JPG to AVIF Converter

Name: JPG to AVIF Converter
Author: S. Siddiqui

Converting a JPG to AVIF typically reduces file size by 40–55% at equivalent visual quality, outperforming both JPG and WebP. AVIF is now supported by all major browsers and is the leading next-generation web image format.

Edited by

S. Siddiqui Founder & Editor-in-Chief

Updated June 2, 2026

Sources:NIST SI Brochure BIPMUpdated Jun 2026

Click to upload or drag and drop

JPG files up to 50 MB · select multiple

.jpg, .jpeg

Free — no signup requiredFiles processed on our server, never storedMax 50 MB per file

What Is the JPG to AVIF Converter?

AVIF (AV1 Image File Format) is derived from the AV1 video codec developed by the Alliance for Open Media — a consortium including Google, Apple, Microsoft, Netflix, and Amazon. AVIF was ratified as a standard in 2019 and uses the same advanced compression algorithms as AV1 video, which was purpose-built to surpass all previous compression technologies.

The compression efficiency of AVIF is exceptional. According to the AVIF specification on Wikipedia, AVIF images are typically 50% smaller than JPG and 20% smaller than WebP at comparable visual quality. For high-resolution photographs on web pages, this translates to dramatically faster load times and reduced data transfer costs.

AVIF supports a comprehensive feature set: up to 12-bit colour depth, wide colour gamuts (including HDR colour spaces like Rec. 2100), full alpha transparency, lossless and lossy compression modes, and image sequences for animation. Browser support covers Chrome (since version 85), Firefox (since version 93), Safari (since version 16), and Edge (since version 121) — approximately 93% of desktop browser users as of 2024.

Google's web performance guidelines actively recommend AVIF for web image delivery. This converter processes your JPG on the server and returns an optimised AVIF file. No account is needed, and files are removed immediately after download.

How to Use the JPG to AVIF Converter

Upload your JPG: Click the upload area or drag and drop a .jpg or .jpeg file. Files up to 50 MB are accepted.
Automatic conversion: The server converts your image to AVIF using optimised compression settings balanced for quality and file size.
Download the AVIF: Click the download button to save the .avif file.
Deploy with a fallback: In your HTML, use the <picture> element to serve AVIF to supporting browsers and JPG or WebP as a fallback for older browsers.

JPG vs AVIF: Compression and Capability

Feature	JPG	AVIF
Compression type	Lossy (DCT)	Lossy and lossless (AV1)
Average size vs JPG	Baseline	40–55% smaller
Colour depth	8 bits per channel	Up to 12 bits per channel
Colour gamut	sRGB	sRGB, Display P3, HDR (Rec. 2100)
Transparency	No	Yes (full alpha)
Animation	No	Yes
Browser support (2024)	Universal	~93% (all modern browsers)
Encoding speed	Fast	Slower (computationally intensive)

When to Use This Converter

High-traffic e-commerce product pages

An online retailer with 12,000 product pages, each displaying 8–12 photographs, is serving 40 GB of images daily. Converting the image library from JPG to AVIF reduces average image sizes from 280 KB to 130 KB — a 54% reduction. At their traffic levels, this represents a saving of 20 GB of daily bandwidth and a measurable improvement in mobile page load times.

News and media websites with large photo archives

A national news website publishes 200 photojournalism images per day. Converting the pipeline output from JPG to AVIF reduces the total image payload of each article page by over 50%, improving time-on-site metrics and reducing bounce rates on mobile connections.

HDR image delivery

A photographer shooting in HDR on a modern mirrorless camera produces images with a colour gamut beyond standard sRGB. AVIF supports wide colour gamuts including Display P3 and Rec. 2020, allowing the full colour range of the image to be preserved for display on modern HDR-capable screens. JPG is limited to sRGB and cannot represent the extended colours.

Progressive web applications and service workers

A developer building a PWA pre-caches destination images in the service worker for offline viewing. Switching from JPG to AVIF for the cached images reduces the cache storage requirement by approximately 45%, allowing twice as many images to be stored within the same storage budget.

Common Mistakes and Troubleshooting

Not providing a fallback for older browsers

Problem: A small percentage of visitors see broken image placeholders. Fix: Always use the HTML <picture> element: serve AVIF as the first source, WebP as the second, and JPG as the final fallback. This covers all browsers without any user-facing errors.

Slow encoding on large image batches

Problem: Converting a library of 1,000 images to AVIF takes significantly longer than converting to WebP or JPG. Fix: AVIF encoding is computationally intensive because of the advanced AV1 codec. For large batch conversions, use a multi-threaded tool like ImageMagick with parallel processing, or a cloud-based image CDN that converts to AVIF on demand.

AVIF files not displaying in Windows Photos

Problem: Opening an AVIF file in Windows Photos shows an error or blank screen. Fix: AVIF support in Windows requires the AV1 Video Extension from the Microsoft Store. Install it free from the Store and Windows Photos will display AVIF files correctly.

Assuming all quality settings are equivalent to JPG

Problem: An AVIF at quality setting 50 looks noticeably worse than a JPG at quality 50. Fix: AVIF quality scales differently from JPG. An AVIF at quality 60 typically looks comparable to JPG at quality 80. Always evaluate output visually rather than by numeric quality value.

Last reviewed: June 2, 2026

Founder's Real-World Experience

S. Siddiqui

Founder & Editor-in-Chief, YourToolsBase

The compression result that made me upgrade the entire image pipeline

After already switching to WebP on YourToolsBase, I ran another performance audit and found the homepage LCP was still marginal on slow 3G connections. On a whim I tested AVIF conversion on the three largest hero images.

The results genuinely surprised me. The three images — a 480 KB WebP hero, a 320 KB WebP product grid image, and a 210 KB tool card — converted to AVIF at 190 KB, 118 KB, and 82 KB respectively. That is a 55–61% reduction from already-optimised WebP files using the same visual quality setting. Mobile LCP improved by nearly a full second on simulated slow 3G.

My current workflow now produces AVIF as the primary format for all new image assets, with WebP as the fallback for older Safari, and JPG as the final fallback. The added HTML complexity of two fallback sources is a small price for a 50% improvement in image delivery performance.

55–61% reduction from WebP baselineLCP improved by ~1 second on 3GFull AVIF pipeline deployed

Also used alongside: JPG to WebP Converter

Frequently Asked Questions

Is AVIF better than WebP?

For compression efficiency, yes. AVIF is typically 20–30% smaller than WebP at equivalent visual quality. AVIF also supports wider colour gamuts and higher bit depths. However, WebP has broader browser support (97% vs 93% for AVIF) and is faster to encode, making it a practical choice for compatibility-sensitive workflows.

Which browsers support AVIF?

Chrome (since version 85), Firefox (since version 93), Safari (since version 16), and Edge (since version 121) all support AVIF. Combined browser support is approximately 93% as of 2024. Always provide a JPG or WebP fallback for older browsers.

How much smaller is AVIF than JPG?

AVIF images are typically 40–55% smaller than JPG at comparable visual quality. For photographic content, this is significantly more efficient than WebP (which is 25–34% smaller than JPG) and dramatically smaller than PNG or TIFF.

Can I open AVIF files on Windows?

Yes. Windows 10 and 11 can display AVIF files in the Photos app after installing the free AV1 Video Extension from the Microsoft Store. Chrome and Edge display AVIF natively without any additional software.

Is AVIF supported on iPhones?

Safari on iOS 16 and later supports AVIF. Older iOS devices running iOS 15 or earlier do not support AVIF and will require a WebP or JPG fallback. When serving AVIF on websites, always use the picture element to provide fallback formats.

Does AVIF support transparency?

Yes. AVIF supports full alpha transparency, making it suitable as a replacement for PNG in web contexts where transparency is needed alongside excellent compression.

Why does AVIF encoding take longer than JPG?

AVIF uses the AV1 codec, which applies significantly more complex compression algorithms than JPG's DCT compression. This produces smaller files but requires substantially more computational work. AVIF encoding can be 10–50x slower than JPG encoding for the same image.

Can I use AVIF for all images on my website?

Yes, with fallbacks. Serve AVIF to modern browsers using the picture element, with WebP and JPG fallbacks for older browsers. Most modern CMS platforms including WordPress, Shopify, and Cloudflare support AVIF natively or via plugins.

What is the difference between AVIF and HEIC?

Both AVIF and HEIC are based on the HEIF container format but use different underlying codecs. HEIC uses the HEVC (H.265) codec and is Apple's proprietary format used on iPhone cameras. AVIF uses the open-source AV1 codec and is a royalty-free open standard supported across all platforms.

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