Free Online PNG to AVIF Converter

Squeeze a PNG into AVIF, which holds detail at far smaller sizes.

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PNG to AVIF: maximum compression for web delivery

AVIF uses the AV1 codec's intra-frame compression which employs prediction-based encoding, transform coding, and in-loop filtering to achieve 50% smaller files than JPG and 20-30% smaller than WebP. Converting a lossless PNG to AVIF applies lossy AV1 compression by default, producing dramatically smaller files. AVIF preserves alpha transparency, supports wide color gamut (Display P3, Rec. 2020), and handles HDR content, capabilities PNG matches only in file size terms.

Convert PNG to AVIF for the smallest possible web images with the best visual quality per byte. AVIF is ideal for hero images, product photography, and media-heavy pages where every kilobyte of bandwidth matters. Check your audience's browser support and serve PNG or WebP as a fallback using the HTML picture element.

PNG vs AVIF: side-by-side

Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.

Property	PNG	AVIF
Full name	Portable Network Graphics	AV1 Image File Format
Year introduced	1996	2019
Developer / standard body	PNG Development Group / W3C	Alliance for Open Media
MIME type	image/png	image/avif
File extension	.png	.avif
Compression	Lossless (DEFLATE)	Lossy or lossless (AV1)
Color / data depth	24-bit truecolor + 8-bit alpha	8/10/12-bit
Max dimensions / size	2,147,483,647 × 2,147,483,647 px	65,536 × 65,536 px
Transparency	Yes	Yes
Animation	APNG extension only	Yes
Standard / specification	W3C / ISO/IEC 15948	AOMedia AV1
Best for	Logos, screenshots, graphics with transparency or sharp edges	Next-gen web images, 50% smaller than JPG, 20% smaller than WebP

Frequently asked questions

Can I convert PNG to AVIF without losing quality?

AVIF is a next-generation AV1-based image format. Converting to a lossless target such as PNG, TIFF or BMP preserves every pixel exactly. Converting to a lossy one such as JPG or WebP re-encodes the image, and iFormat uses a high default quality so the difference is invisible at normal viewing size. For the sharpest result, always convert from the highest-quality source you have.

What is PNG?

PNG is a lossless format with transparency support, typically used for logos, screenshots, and graphics with sharp edges. Converting it to AVIF produces a file that opens on systems without PNG support.

How do I open PNG files?

On Windows: Photos, or any browser. On a Mac: Preview, or any browser. Universally supported. PNG also carries transparency, which is why screenshots and logos use it.

Will AVIF preserve my PNG transparency?

Yes. AVIF supports full alpha-channel transparency. Semi-transparent edges, shadows, and variable opacity all carry across from PNG. AVIF with transparency is significantly smaller than the equivalent PNG.