PNG to AVIF: The Complete Guide to Modern Image Conversion
What Is AVIF?
AVIF stands for AV1 Image File Format, developed in 2019 by the Alliance for Open Media (AOMedia) — a consortium including Google, Microsoft, Mozilla, Amazon, Netflix, Apple, and Intel. AVIF leverages the AV1 video codec to compress still images with remarkable efficiency, consistently outperforming JPEG, PNG, and WebP in file size at equivalent visual quality. It supports both lossy and lossless compression, HDR content, wide color gamuts, and full alpha channel transparency.
What Is PNG?
PNG (Portable Network Graphics) was developed in 1996 as a royalty-free alternative to GIF. It uses lossless compression that preserves every pixel of your original image exactly. This makes PNG ideal for screenshots, logos, icons, diagrams, and any image requiring sharp edges or transparent backgrounds. The tradeoff is file size: a high-resolution photograph in PNG can be ten to twenty times larger than the same image in JPEG. Even with optimization tools, PNG files for photographic content remain much larger than lossy alternatives, making them costly to serve on the web.
Why Convert PNG to AVIF?
The primary reason to convert PNG to AVIF is dramatic file size reduction. AVIF files are typically 40 to 60 percent smaller than equivalent PNG files at the same visual quality. For web delivery, this means faster page loads, lower bandwidth costs, and improved Google Core Web Vitals scores. Google PageSpeed Insights specifically recommends serving images in next-generation formats such as AVIF and WebP. AVIF is approximately 20 percent smaller than WebP, which was already a major improvement over PNG. For transparent images such as logos, product cutouts, and UI elements, AVIF is especially valuable because it matches PNG transparency support at a fraction of the file size.
Does AVIF Support Transparency?
Yes. AVIF supports full alpha channel transparency. Images with transparent backgrounds convert perfectly from PNG to AVIF with transparency preserved in the output file. This is a significant advantage over JPEG, which cannot represent transparency at all. AVIF is a true drop-in replacement for PNG in any workflow requiring transparent graphics such as logos, icons, and product images with cutout backgrounds.
AVIF Browser Support
AVIF has broad modern browser support: Chrome 85 and later (August 2020), Firefox 93 and later (October 2021), Safari 16.4 and later (March 2023), and Edge 121 and later. These browsers cover over 93 percent of global web traffic. For users on older browsers, you can serve PNG as a fallback via the HTML picture element, ensuring all users see your images correctly.
How to Convert PNG to AVIF
- Select your PNG file — click the upload area or drag and drop. PNG files with transparency are fully supported.
- Review the preview — confirm the correct file is loaded before converting.
- Click Convert to AVIF — conversion happens instantly in your browser with no server upload required.
- Download your AVIF — save the output file. The filename matches your original PNG with the extension changed to .avif.
Web Performance Impact
Images typically represent 50 to 80 percent of a web page total byte weight. Switching from PNG to AVIF can reduce this substantially. Pages with large PNG hero images or icon libraries see dramatic improvements in Largest Contentful Paint (LCP) and overall page weight, both directly affecting user engagement and search engine rankings. Many production websites have reported 40 to 60 percent reductions in total image payload after migrating from PNG to AVIF.
About This Tool
This PNG to AVIF converter runs entirely in your browser using the HTML5 Canvas API and built-in browser image codecs. No file is ever uploaded to any server. Your images remain private on your device at all times. There are no file size limits, no watermarks on output files, no registration required, and no cost for any number of conversions.