Is AVIF supported by all browsers?

AVIF is supported by Chrome 85+ (2020), Firefox 93+ (2021), Edge 121+ (2024), and Safari 16.1+ (2022). Globally, AVIF coverage is over 93% of browsers as of 2025. For older browsers, you can serve AVIF with a JPEG fallback using the HTML element.

Will my JPG look different as AVIF?

At equivalent quality settings, AVIF typically looks as good as or better than JPEG at a much smaller file size. At the default 90% quality setting, most people cannot tell the difference in a side-by-side comparison.

Does this converter work offline?

Yes. Once the page has loaded in your browser, the conversion happens locally using the Canvas API. You can disconnect from the internet and convert files — it still works.

Can I set the compression quality?

Yes. Use the quality slider in the converter. Higher quality means larger files but better image fidelity. For web images, 80–90% quality typically provides an excellent balance.

Does AVIF support transparency?

Yes, AVIF supports alpha channel transparency. However, JPG does not support transparency — if your source is a JPG, the output AVIF will be fully opaque.

Can I convert multiple JPG files to AVIF at once?

Yes. Drop multiple JPG files into the drop zone. When all are done, download them all as a ZIP file.

JPG to AVIF Converter — Free, Private, Browser-Based

What Is AVIF?

AVIF (AV1 Image File Format) is a modern image format developed by the Alliance for Open Media — the consortium behind the AV1 video codec used by YouTube, Netflix, and most major streaming platforms.

Unlike JPEG, which was standardized in 1992, AVIF uses the modern AV1 codec designed for efficiency. The result is dramatic: AVIF images are typically 50% smaller than JPEG at equivalent visual quality, and often smaller than WebP as well.

AVIF also supports:

HDR (High Dynamic Range) with 10-bit and 12-bit color
Wide color gamut (P3, Rec. 2020)
Alpha channel transparency
Lossless compression mode
Animated images (like animated GIF, but with far better compression)

Why Convert JPG to AVIF?

Web performance is the primary reason. Page speed is a Google ranking factor, and images are often the largest elements on a page. Converting your JPG images to AVIF can reduce image weight by 40–60%, leading to:

Faster page load times
Lower bandwidth usage for your visitors
Better Core Web Vitals scores (especially Largest Contentful Paint)
Lower hosting/CDN costs

AVIF vs. JPEG at the same file size. AVIF achieves better quality at equivalent file sizes. If you currently serve a 200 KB JPEG, the equivalent AVIF might be 90–120 KB — with equal or better perceived quality.

AVIF vs. WebP. AVIF generally outperforms WebP in compression efficiency, especially at lower bitrates. If you are already using WebP, switching to AVIF (with WebP as a fallback for older browsers) can yield another 20–30% reduction.

Browser support is now mainstream. As of 2025, AVIF is supported by over 93% of browsers worldwide. Safari added support in 2022, which resolved the last major gap. For the remaining browsers, you can serve a JPEG fallback:

<picture>
  <source srcset="image.avif" type="image/avif">
  <img src="image.jpg" alt="Description">
</picture>

How This Converter Works

Modern browsers include an AV1 encoder via the Canvas API’s toBlob method with image/avif MIME type (supported in Chrome, Edge, and some versions of Firefox). The conversion process:

Your JPG file is loaded using the JavaScript FileReader API.
The JPG is decoded into an <img> element using the browser’s built-in JPEG decoder.
The image is drawn onto an HTML5 canvas element.
The canvas exports the pixels as AVIF using canvas.toBlob('image/avif', quality).
The resulting AVIF file is delivered as a browser download.

Everything happens locally in your browser. No files are sent to a server.

Note: AVIF encoding availability depends on your browser. Chrome and Edge support AVIF encoding via the Canvas API. If your browser does not support AVIF encoding, the converter will indicate this. For best results, use the latest version of Chrome or Edge.

Step-by-Step Guide

Step 1 — Add your JPG files. Drag and drop one or more .jpg or .jpeg files into the converter drop zone, or click Browse files to pick files from your computer.

Step 2 — Set quality (optional). The default quality is 90%, which is suitable for most uses. For aggressive web optimization, try 75–85%. For archiving or high-quality output, use 90–95%.

Step 3 — Conversion runs automatically. Each JPG is decoded and re-encoded as AVIF. Depending on image size and your hardware, this may take a moment — AVIF encoding is more computationally intensive than JPEG encoding.

Step 4 — Download your AVIF files. Click Download next to each file, or use Download all as ZIP when multiple conversions are complete.

Privacy and Security

All conversion happens in your browser. pixconv.io does not:

Upload your images to any server
Store or cache your files between sessions
Require a login or account
Track which files you convert

This is especially important for proprietary images, client work, or any photos you do not want to share with third-party cloud services.

Tips for Best Results

Quality settings. AVIF quality is not directly comparable to JPEG quality percentages — AVIF at 80% often looks better than JPEG at 80%. Experiment with lower quality settings (70–85%) before settling on a value.

Web delivery. When deploying AVIF on a website, always provide a JPEG fallback using the <picture> element. This ensures users on unsupported browsers still see the image.

Lossy vs. lossless. JPG is inherently lossy — it does not preserve every pixel exactly. Converting to AVIF re-encodes the image, so choose a quality level that matches your tolerance for visual changes. For archival purposes, consider keeping the original JPG as well.

Large batch conversions. For dozens or hundreds of files, convert in smaller batches (20–30 files at a time) to avoid memory pressure in your browser.

Frequently Asked Questions

What is AVIF and why convert to it?

AVIF is a next-generation image format that achieves 40–60% smaller files than JPEG at equivalent visual quality. It is ideal for web delivery — faster pages, lower bandwidth, better Core Web Vitals scores.

Is AVIF widely supported?

As of 2025, AVIF is supported by Chrome, Edge, Firefox, and Safari. Global browser coverage exceeds 93%. For any remaining unsupported browsers, serve a JPEG fallback with the HTML <picture> element.

How much smaller will my images be?

AVIF typically achieves 40–60% size reduction compared to JPEG at equivalent quality. Results vary by image content: high-detail photos may see 40% reduction, while simple graphics or flat illustrations often achieve 60–70%.

Can I convert JPG to AVIF on Mac or iPhone?

Yes. The converter works in any modern browser on Mac, Windows, Linux, iPhone, and Android. Safari (iPhone/Mac) supports AVIF encoding in recent versions.

Does AVIF replace JPEG completely?

For web delivery, AVIF is superior to JPEG in nearly every way. For offline or archival use, JPEG still has broader support in desktop software. The two formats will coexist for years, with AVIF becoming the standard for web delivery.

What happens if my browser doesn’t support AVIF encoding?

If your browser’s Canvas API does not support image/avif encoding, the converter will show an error for AVIF output. Switch to Chrome or Edge (latest version) for AVIF encoding support.