Are my images uploaded to a server?

No. The entire conversion runs inside your browser using the HTML5 Canvas API. Your image never leaves your device.

Which browsers support AVIF encoding?

AVIF encoding via Canvas is supported in Chrome 93+, Edge 93+, and Opera. Firefox and Safari do not yet support canvas.toBlob with image/avif. If your browser is unsupported, an error message will appear.

What input formats are supported?

JPG and JPEG files are supported as input. The output is always an AVIF file.

What quality setting should I use?

Quality 75–85 is the sweet spot for most photos — visually near-lossless at significantly smaller file sizes than JPG. For high-detail or text-heavy images, 90+ is safer. For thumbnails or previews, 60–70 is acceptable.

Why is the AVIF sometimes larger than the original?

Very low-quality JPGs, simple flat-color images, or very high quality settings can occasionally produce a larger AVIF. Try lowering the quality slider to achieve a smaller output.

Is there a file size limit?

The limit is your browser's available memory, typically several hundred megabytes. Very large images over 30 megapixels may be slow to process on low-end devices.

JPG to AVIF Converter

Upload a JPG or JPEG image, adjust the quality slider, and download the AVIF — all processed locally in your browser, nothing sent to a server.

Upload Image

Click or drag an image here

JPG and JPEG files supported

AVIF Quality

1 — smallest 100 — best

Preview (AVIF output)

Upload a JPG to see the AVIF preview

Adjust quality to compare sizes in real time

Downloaded!

Summary

This tool converts JPG and JPEG images to AVIF format entirely inside your browser using the HTML5 Canvas API. No files are ever uploaded to any server — all processing happens on your device. AVIF typically delivers 40–50% smaller files than JPG at equivalent visual quality, making it one of the most efficient modern image formats. Use the quality slider to balance image clarity against file size and see a live size comparison before downloading.

How it works

Select or drag a JPG or JPEG image onto the upload area.
Adjust the AVIF quality slider (1–100, default 80) to your preference.
The preview and estimated output size update instantly.
Review the before/after file size comparison.
Click "Download AVIF" to save the converted image.

Use cases

Shrink large JPG photos for faster web page loads.
Convert product images to AVIF for maximum e-commerce performance gains.
Reduce image weight for Core Web Vitals improvement.
Prepare design exports for modern browsers that support AVIF.
Optimize hero images and banners without losing visual quality.
Preview different quality levels before final export.
Process images privately without uploading to a third-party service.
Replace high-resolution JPEG banners with smaller AVIF equivalents.

Frequently Asked Questions

Last updated: 2026-05-28 · Reviewed by Nham Vu