osu! preview is a browser extension that allows users to preview gameplay of osu! beatmaps without the need to download the map. Developed by Jerry Zhu, this free extension is available for the Chrome platform.

With osu! preview, users can easily get a glimpse of the gameplay before deciding to download and play the beatmap. The extension supports most osu! standard maps and osu! mania maps, although it may not work as effectively with older maps.

One of the key features of osu! preview is its ability to play the preview audio synchronized with the hit objects. This allows users to experience the rhythm and feel of the beatmap, giving them a better understanding of what to expect. Additionally, the extension allows users to seek to any point in the map, enabling them to explore different sections and evaluate the difficulty.

Overall, osu! preview is a handy tool for osu! players who want to quickly preview beatmaps without the hassle of downloading them. Its intuitive interface and synchronization of preview audio make it a valuable addition to the osu! community.