What is PNG to AVIF Converter?
PNG to AVIF Converter transforms PNG images into the AVIF format. PNG files are lossless — they preserve every pixel perfectly, but they're large. A typical PNG screenshot is 2–5MB. The same image in AVIF is 200–500KB. That's an 80–90% reduction. Web developers use this tool to optimize hero images, icons, and UI assets that were saved as PNG. The AVIF format handles transparency just like PNG does, so transparent backgrounds and alpha gradients survive the conversion. AVIF also supports lossless compression mode if you need pixel-perfect output. The tool runs in your browser. You select your PNG files, adjust quality settings, and download the AVIF output. No account needed, no file size limits, no software to install.
PNG to AVIF Converter Formula
A client-side pipeline decodes your PNG, processes it in memory, and encodes it as AVIF.
PNG Decoding
The browser decompresses your PNG file using its native decoder. PNG uses DEFLATE compression on filtered scanlines — the output is raw RGBA pixel data with full alpha channel information.
Transparency Preservation
Unlike JPEG conversion, the alpha channel from your PNG is fully preserved. AVIF supports 8-bit and 10-bit alpha channels, so even complex gradients and semi-transparent overlays transfer cleanly.
AVIF Encoding
The canvas exports the image as AVIF. The AV1 encoder applies perceptual compression — it analyzes which details the human eye notices and preserves those while compressing less-visible information more aggressively.