PNG to AVIF Converter: Convert PNG to AVIF Online

Convert PNG to AVIF

AVIF (AV1 Image File Format) is the next-generation image format built on the AV1 video codec. It consistently produces smaller files than both JPEG and WebP while maintaining equal or better visual quality. A 5 MB PNG photograph compresses to 200-400 KB as AVIF at quality 80, with differences invisible at normal viewing sizes.

This tool converts PNG to AVIF entirely in your browser using the Canvas API. No files are uploaded to any server. Drop your PNG, adjust quality, and download the result.

Why AVIF over WebP or JPEG?

AVIF was designed to replace both formats. It outperforms WebP by 20-30% in file size at equivalent quality for photographs, and unlike JPEG, it supports transparency and wide color gamut (HDR). The AV1 codec behind AVIF was developed by the Alliance for Open Media, which includes Google, Apple, Mozilla, Microsoft, and Netflix.

The main tradeoff is browser support. While WebP works in 97%+ of browsers, AVIF support sits around 93% as of 2025. If you serve images on the web, the standard approach is to use the HTML <picture> element with AVIF as the primary source and WebP or JPEG as fallback.

How to use

1. Drop or paste a PNG file into the converter above
2. Adjust the quality slider (80-85 is the sweet spot for photographs)
3. Preview the size comparison between original and converted
4. Download the AVIF file

When to convert PNG to AVIF

Convert when you have photographs or complex images stored as PNG that need to be served on the web. PNG files for photographs are typically 5-10x larger than necessary. AVIF closes that gap more aggressively than any other format while preserving transparency when needed.

Skip the conversion for simple icons, logos, or diagrams where the PNG is already small (under 20 KB). The encoding overhead is not worth it for tiny files, and SVG is usually the better choice for vector graphics.

If your workflow involves the Base64 Encoder for embedding images inline, converting to AVIF first can significantly reduce the encoded string length.