A free PNG to AVIF converter that works in your browser, with a quality score on every file and nothing uploaded.
5.0(1 rating)Drop your PNG files to convert them to AVIF, with a score on each that shows how close it looks. It all happens in this browser.
Your PNG files
Settings
The smallest files at the same quality. Keeps transparency.
No visible change. Each PNG is the smallest file that still scores 90.
Convert
Add an image to compress.
Everything happens in this browser, so your images never leave your computer. PNGs are compressed with libimagequant and OxiPNG, JPGs with Google's JPEGli, and every result is scored with SSIMULACRA 2, the quality metric from Cloudinary and JPEG XL.
This free PNG to AVIF converter makes PNGs as small as they get for your website, with transparency kept.
It scores each result and uploads nothing.
Here's what a PNG to AVIF converter does, when to use one, and how this one did against CloudConvert.
What is a PNG to AVIF converter?
A PNG to AVIF converter turns a PNG image into a AVIF file: the same picture, in a format that opens somewhere else.
This one works in your browser, and gives every file a score that shows how close it looks to the original.
Why convert PNG to AVIF?
AVIF is the newest image format for the web, and every current browser shows it. It holds a picture in less space than WebP, and far less than PNG.
Screenshots, graphics and photos all shrink by 85% or more, and see-through parts stay see-through.
Compared with CloudConvert
I converted the same PNG files here and with CloudConvert, at each one's default settings. Then I scored every result against its original:
- Original
- 321 KB
- CloudConvert
- 26 KB, score 79.2
- This converter
- 26 KB, score 83.6
- Original
- 307 KB
- CloudConvert
- 24 KB, score 72.8
- This converter
- 34 KB, score 82.3
- Original
- 558 KB
- CloudConvert
- 13 KB, score 61.9
- This converter
- 32 KB, score 79.2
- Original
- 225 KB
- CloudConvert
- 15 KB, score 79.6
- This converter
- 27 KB, score 87.4
CloudConvert made files the same size or smaller by keeping less of the picture: its photo scored 61.9, where the loss shows. This converter's scored 79.2 to 87.4.
At the same size, the screenshot scored 83.6 here and 79.2 there.
How I tested
I tested on September 29, 2026. The PNGs were a Mac screenshot, a graphic from this site, Kodak test photo 23 and the PNG transparency demonstration from Wikimedia Commons.
The score is SSIMULACRA 2, a metric from Cloudinary that compares two pictures the way your eye does:
| Score | What it means |
|---|---|
| 90 and up | Looks identical: no difference even flicking between them at 100% |
| 80 to 90 | Same side by side at 100% |
| 70 to 80 | High quality: hard to notice without comparing |
| 50 to 70 | Medium quality: you can see it up close |
| Under 50 | Visible loss |
Who is the PNG to AVIF converter for?
It's for site owners who want the smallest images:
- PNG to WebP – anyone who wants a format every older browser shows too
- PNG compressor – anyone who needs to keep the PNG format
- Image resizer – anyone who needs fewer pixels too
- Compress image to 100 KB – anyone fitting a size limit
It works in your browser, and the new file leaves out hidden details like the camera and where a photo was taken.
More free image converters
Here are my other free image converters. Each one works in your browser, at full size:
- HEIC to JPG – iPhone photos that open anywhere
- WebP to PNG – every pixel kept, transparency too
- WebP to JPG – WebP images that open anywhere
- PNG to WebP – much smaller images for your site
- JPG to WebP – never bigger than your JPG
- PNG to JPG – photos up to 92% smaller
- JPG to PNG – every pixel kept, ready to edit
- AVIF to JPG – AVIF images that open anywhere
They score every file, and none upload your pictures.
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PNG to AVIF FAQs
Questions about the pNG to AVIF converter? Here's what to know.
A PNG to AVIF converter turns a PNG image into a AVIF file: the same picture in another format.
This one works in your browser, with a score on every file.
PNG is the format for screenshots, logos and graphics.
It keeps every pixel exactly, so photos saved as PNG come out very big.
AVIF is usually smaller at the same look.
WebP is older, so a few more apps open it.
Yes, see-through parts of a PNG stay see-through in the AVIF.
Yes, every current version of Chrome, Safari, Firefox and Edge shows AVIF.
Yes, it's free, with no account and no limit on files.
It runs in your browser, so it costs nothing to run.
No, the PNG to AVIF converter works in your browser.
Your images never leave your computer.
Yes, drop up to 50 files at once, 50 megapixels each.
Download them one by one, or all together as one ZIP.
I did.
I'm Navid Moazzez, and the PNG to AVIF converter is one of my free tools on navid.me.
Read more about me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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