Does AVIF keep PNG transparency?

Yes. AVIF supports an alpha channel, so the transparency in your PNG is preserved when the image is re-encoded.

Are my images uploaded to a server?

No. Conversion happens entirely in your browser using the HTML canvas — your images are never uploaded, stored or seen by anyone.

How accurate is the conversion?

The PNG is decoded and re-drawn at its original pixel dimensions, then re-encoded as AVIF at the quality you choose. At quality near 100% the result stays very close to the original while still shrinking the file.

Why is AVIF smaller than PNG?

PNG uses lossless compression that works well for graphics but poorly for photos. AVIF uses modern AV1-based compression that discards imperceptible detail, often cutting file size by 50% or more at high visual quality.

What quality setting should I use?

The slider maps to the encoder's quality from 0.1 to 1. Values around 0.7–0.9 give a strong size reduction with little visible loss; 1 approaches lossless. Lower it further only if file size matters more than fidelity.

Which browsers can create AVIF?

AVIF encoding needs a recent browser such as Chrome, Edge, Firefox or current Safari. If your browser cannot encode AVIF, the tool shows a clear error instead of producing a broken file.

Can I convert several PNGs at once?

Yes. Drop multiple PNG files and each is converted independently, shown with its new size and its own download button.

PNG to AVIF Converter

Convert PNG images to AVIF without uploading them

AVIF is a modern image format that compresses far better than PNG for photographs and flat-colour graphics alike, while still supporting transparency. This tool re-encodes your PNGs as AVIF with a quality slider you control, so you can trade file size against fidelity — ideal for shrinking images destined for the web.

How it works

Each PNG is decoded, drawn onto an HTML <canvas> at its original pixel dimensions, then re-encoded with the browser’s built-in AVIF encoder:

PNG → decode → draw to <canvas> → canvas.toBlob("image/avif", quality)
quality slider: 0.1 (smallest) … 1 (near lossless)

The alpha channel is carried through, so transparency survives. If the browser cannot produce AVIF, a clear error is shown instead.

Example

A 500 KB PNG screenshot re-encoded at quality 0.8 typically drops to well under 150 KB as AVIF while looking visually identical, with any transparent areas preserved.

Quality	Typical result
1.0	Near lossless, largest AVIF
0.8	Strong shrink, no visible loss
0.5	Smallest, slight softening

Everything runs locally in your browser — your images are never uploaded, stored, or seen by anyone.