Turn a PNG into a much smaller AVIF file, in supported browsers.
PNG to AVIF Converter
PNG files are reliable and universal, but they are also large. A PNG screenshot or graphic can easily weigh several megabytes, which slows down pages, eats mobile data and fills storage. AVIF, the modern format based on the AV1 video codec, can shrink the same picture dramatically, often to a fraction of the PNG size, while keeping it looking the same. This free tool converts PNG to AVIF in your browser, with no upload and no account.
There is one honest limitation to state up front, and the tool states it too: AVIF encoding through the browser works in Chrome and Edge only, at the time of writing. Other browsers can display AVIF but cannot yet create it this way. When you open the tool, it tests your browser immediately. If encoding is available, the convert button is enabled; if not, the button stays disabled and the tool explains why, rather than pretending to convert and handing you a broken file.
When your browser supports it, conversion is simple. Choose a PNG, check the preview, and set the quality slider: 80 is a strong default, lower values produce tiny files for fast pages, and higher values protect fine text and edges. Click convert and download the AVIF. Because AVIF handles gradients and photographic detail far better than PNG, screenshots, illustrations and photos all tend to shrink a lot, and transparency is preserved, so graphics with see-through areas keep working.
The size savings matter in real use. A website that swaps PNG screenshots for AVIF versions can load noticeably faster on slow connections, which helps visitors stay and helps search engines view the page favourably. A presenter can fit more slides into an email attachment limit, and a phone user can store more pictures in the same space. For any picture that will be viewed in a modern browser, AVIF is currently the most efficient choice available.
A few tips improve results. Flat graphics with sharp text benefit from quality 85 or higher, since aggressive compression can soften tiny letters. Photographs tolerate quality 70 to 80 very well. And keep the PNG original: AVIF is a lossy format at these settings, so the PNG remains your lossless master if you ever need to edit or reconvert. If the tool reports that your browser cannot encode AVIF, try Chrome or Edge, where the feature is supported today.
Common questions are straightforward. Is the PNG changed? No, it stays untouched and a new AVIF is created. Is there a watermark? No. Does the tool upload my picture? Never: encoding happens on your device, and the file never travels to a server. That privacy matters for screenshots that may contain personal information.
If your browser supports AVIF encoding, this tool turns heavy PNG files into tiny AVIF versions in seconds. Load the PNG, pick a quality, download the AVIF, and enjoy the smaller file without giving up the picture.
What the Size Saving Means for a Whole Site
A single PNG converted to AVIF saves kilobytes, but a whole site converted saves seconds. Consider a help centre with two hundred screenshots: at an average saving of seventy percent, a library that weighed a gigabyte as PNG weighs three hundred megabytes as AVIF, and every page that embeds those screenshots loads faster for every visitor. Faster pages keep readers, reduce bounce, and cost less to serve. The conversion work itself is small when done in batches, and the benefit compounds with every visit, which is why format migration is one of the cheapest performance wins a site owner can make, and one that keeps paying off long after the work is done.
Versión en español: Convertidor de PNG a AVIF Gratis – Archivos AVIF más Ligeros