AVIF to PNG Converter

AVIF to PNG: a lossless, editable copy with transparency

This AVIF to PNG converter decodes AVIF images and saves them as PNG — keeping transparent backgrounds and every decoded pixel. Use it when you need to edit an AVIF in software that doesn’t read it, place a transparent graphic in a document or slide deck, or keep a master copy that won’t degrade when you save it again.

It runs entirely in your browser. AVIFs are decoded natively where possible; if your browser lacks AVIF support, a WebAssembly decoder (@jsquash/avif, Apache-2.0) takes over automatically.

How to use the AVIF to PNG Converter

1. Add AVIF files by dropping them on the upload area, clicking to choose, or pasting with Ctrl+V.
2. The PNGs are produced immediately; the list shows dimensions and before and after sizes.
3. Click a thumbnail to preview it, and toggle between Converted and Original.
4. Download single PNGs or press Download all for a ZIP.

AVIF to PNG Converter features

Why turn a small AVIF into a bigger PNG?

It seems backwards: AVIF compresses far better, so the PNG can easily be many times larger. But PNG brings things AVIF can’t yet offer everywhere — it opens in practically every editor, office suite, design tool and operating system, and because it is lossless you can edit and save it again and again without the picture degrading.

Converting is also the cleanest way to get transparency into tools that don’t understand AVIF. A transparent AVIF dropped into an older presentation program may fail to load; the PNG version keeps its see-through background and just works.

Things to know about AVIF to PNG

• Bit depth: AVIF can be 10- or 12-bit, but browsers decode into 8 bits per channel, so the PNG is 8-bit RGBA. That is fine for screens; very subtle gradients from HDR sources may band slightly.
• Colour: wide-gamut and HDR images are converted to standard sRGB as the browser draws them.
• Compression artefacts already in the AVIF are kept exactly — PNG preserves, it doesn’t repair.
• For smaller files without transparency, AVIF to JPG is the better choice.
• Next steps: shrink the PNG’s dimensions with the image resizer, or build a document with PNG to PDF.

How an AVIF file is built

An AVIF file is an ISO Base Media File Format container — the same family as MP4 and HEIC. It begins with an ftyp box naming the avif brand (or avis for image sequences), followed by a meta box describing the image items and their properties, and then the compressed AV1 data. Transparency is stored as a second, greyscale AV1 image linked to the main one as an auxiliary alpha item.

This converter reads that signature to recognise genuine AVIF files whatever their name, and to tell an AVIF from an iPhone HEIC photo, which uses the same container with a different codec. HEIC files are pointed to the HEIC to JPG converter instead.