FreePNGConvert

Rather than one general converter, the site is a set of them, each pinned to a specific pair of formats. The picker lists WebP to PNG, GIF to PNG, JPG to PNG, DDS to PNG and AVIF to PNG, along with the reverse directions PNG to JPG and PNG to WEBP.

Conversion happens where the page is open. The site describes itself as 100% browser-based with no upload, no signup and no watermark on the output, so the image never has to be sent to a server to change format.

Each format pair has its own page, so a specific converter such as WebP to PNG can be bookmarked directly instead of being reached from the home page each time. The home page frames the whole set with a single line about converting any image to PNG right in the browser, and a Chinese language option is offered alongside the English interface.