@4x is a Chrome extension developed by leucochroic that allows users to enjoy custom emoticons in Hipchat at a larger size. This free add-on falls under the Browsers category and specifically the Add-ons & Tools subcategory.

The main feature of @4x is its ability to spoof the device pixel ratio, convincing the Hipchat web client to serve 4x/retina resolution emoticons. This ensures that users can view their favorite emoticons in high quality without them appearing pixelated or blurry. The extension also provides the option to resize image and video previews by simply clicking and dragging on the image, similar to the functionality found in Reddit Enhancement Suite.

Recent updates have brought improvements to Version 4.3 introduced an options page, allowing users to customize the size of emoticons. Additionally, a bug related to the distortion of aspect ratio for uploaded image files was fixed. Version 4.2 resolved the bug responsible for aspect ratio distortion when resizing images. Version 4.0 made resizing less intrusive and more similar to Reddit Enhancement Suite's resizing. It also extended the resizing functionality to video and file upload previews. Version 3.1 improved the resizing bar, making it smoother and less janky. Version 3.0 introduced the resizing bar for image previews.

With @4x, users can enhance their Hipchat experience by enjoying high-resolution emoticons and easily resizing image and video previews.