Convert PNG to AVIF Online — Maximum Compression Free
AVIF achieves extraordinary compression compared to PNG — 80-95% file size reduction for photographic content, and 50-70% even for graphics with transparency. If your website serves PNG images and you want the absolute smallest files without sacrificing visual quality, AVIF is the format to use. Convert your PNG files to AVIF for the smallest possible file sizes with excellent visual quality, right in your browser.
Why Convert PNG to AVIF?
PNG files are lossless and often very large — a product photo might be 3-5MB, a hero banner 8-10MB, and a high-resolution screenshot 5-15MB. AVIF provides lossy compression that dramatically outperforms every other format, including WebP and JPEG. For web use, AVIF with transparency is the ideal replacement for PNG. You get the same visual quality and alpha channel support at a fraction of the file size. A 5MB PNG hero image with transparency might become just 200-500KB as AVIF — that's a 90-95% reduction while maintaining transparency. This is the single biggest optimization you can make for PNG-heavy websites. E-commerce sites with product images on transparent backgrounds, design portfolios with PNG mockups, and any site using large PNG graphics will see transformative performance improvements from switching to AVIF. AVIF supports both lossy and lossless compression modes. For web delivery, lossy AVIF at 80-85% quality is the sweet spot — visually identical to the PNG source at 80-95% smaller file size. For archival where lossless is required, AVIF lossless still offers 20-40% better compression than PNG. Browser support covers over 92% of global traffic (Chrome, Firefox, Safari, Edge). Use the HTML <picture> element with a PNG fallback for maximum compatibility.
How It Works
Upload your PNG file. The image is decoded to raw pixel data (preserving any transparency/alpha channel), then encoded to AVIF using a WASM-based AV1 encoder running entirely in your browser. No image data is sent to any server. The quality slider controls the tradeoff between file size and visual quality. For most web use, 75-85% produces files that are visually indistinguishable from the PNG source while being 80-95% smaller. For images with transparency, the alpha channel is encoded separately and preserved perfectly. Encoding takes a few seconds per image (3-10 seconds typically). All metadata is stripped from the output, and the resulting AVIF file is production-ready for your website, CDN, or CMS.
All Supported Formats
While this page is optimized for PNG to AVIF conversion, our universal image converter supports all major formats: JPEG, PNG, WebP, HEIC, AVIF, JPEG XL, TIFF, SVG, BMP, and GIF. All conversions run 100% in your browser with automatic metadata stripping.
Frequently Asked Questions
Does AVIF support transparency like PNG?
Yes. AVIF fully supports alpha channel transparency, including partial/gradient transparency with 256 levels of opacity — identical to PNG's capabilities. Your PNG's transparent areas are preserved perfectly in the AVIF output. This makes AVIF the ideal modern replacement for PNG on the web.
How much smaller will the AVIF be?
For photographic PNGs: 80-95% smaller. For graphics with flat colors: 50-80% smaller. For transparent graphics: 60-90% smaller. A 5MB PNG photo might become 200-500KB as AVIF. A 1MB PNG logo with transparency might become 50-150KB. The savings are dramatic and directly translate to faster page loads.
Is this PNG to AVIF converter safe?
Yes. The WASM-based encoder runs entirely in your browser — your PNG files are never uploaded to any server. We have zero access to your images. This is safe for converting proprietary assets, client work, and sensitive images.
Can I convert multiple PNG files to AVIF at once?
Yes. Batch mode supports up to 5 files for free users and up to 10 for Pro users. AVIF encoding takes 3-10 seconds per image due to the computational complexity of AV1 compression. All converted files can be downloaded individually or as a ZIP archive.
How long does PNG to AVIF encoding take?
Typically 3-10 seconds per image, depending on image dimensions and your device's processing power. AVIF encoding is more CPU-intensive than WebP or JPEG because the AV1 codec uses more advanced compression algorithms. The tradeoff is much smaller file sizes. Modern devices (2020+) handle this comfortably.
Should I use AVIF or WebP to replace PNG on my website?
AVIF produces 20-30% smaller files than WebP at the same quality, making it the better choice for maximum optimization. However, WebP has slightly broader browser support (97% vs 92%) and much faster encoding. The ideal approach is to serve AVIF first, with WebP as fallback, and PNG as the final fallback using the HTML <picture> element.
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