PNG to AVIF Converter

Convert PNG images to AVIF for the smallest possible file sizes with transparency support. AVIF can be 3-5x smaller than PNG. LessMB converts locally in your browser.

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JPG · PNG · WebP · GIF · AVIF · SVG

No upload required100% free foreverWorks in your browser
How it works

PNG to AVIF Converter for private browser workflows

3-5x smaller than PNG

AVIF dramatically outperforms PNG for file size while supporting transparency and millions of colors.

Transparency preserved

AVIF supports alpha transparency like PNG, so logos and icons keep their transparent backgrounds.

Local conversion

Your PNG is decoded and re-encoded as AVIF entirely in your browser. No server upload is needed.

Common use cases

Replace heavy PNG assets with lightweight AVIF for faster page loads.

Web performance

Keep transparency while dramatically reducing file size for web overlays.

Transparent graphics

Use AVIF for next-generation web design with the best compression available.

Modern websites

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FAQ

PNG to AVIF Converter FAQ

Answers for the most common questions about this tool, supported workflows, and local browser processing.

No uploadFree toolBrowser-based
Does AVIF support transparency?

Yes. AVIF supports full alpha transparency like PNG, but with much smaller file sizes.

Is converting PNG to AVIF free?

Yes. LessMB converts PNG to AVIF for free in your browser without requiring an account.

Are files uploaded?

No. Conversion runs locally in your browser session.