Emby uses web technologies (HTML/CSS/JS) for its web UI and apps, so you can customize its appearance by adding CSS themes. Below is a concise, practical overview for creating, installing, and maintaining Emby CSS themes.
CSS filters like backdrop-filter: blur() are GPU-intensive. If the interface feels sluggish on old hardware, remove any .blur or .backdrop-filter rules. emby css themes
There are two ways to apply CSS in Emby: globally (for all users) or per-user. The most common method is the Global Custom CSS, which ensures a consistent look for everyone accessing the server. Emby CSS Themes — Quick Guide Emby uses
It is worth noting that theming in Emby is easier than in Plex (which requires specific third-party agents or the PlexPass web tools) but arguably less versatile than Jellyfin. Jellyfin has a very active skinning community with actual "Plugins" that act as skins (like JellySkin). Emby relies entirely on manual CSS injection, which feels slightly more "hacker-ish" and less user-friendly. If the interface feels sluggish on old hardware, remove any
Adjusting the size and rounding of movie/show posters:
/* Rounded posters with glow effect */
.cardImage
border-radius: 12px;
box-shadow: 0 4px 8px rgba(0,0,0,0.5);
.cardImage:hover
transform: scale(1.02);
transition: transform 0.2s;