OverCastUI
by merenotnoone
OverCastUI is a Fabric client mod that brings a Chromium web browser into Minecraft, so a player can keep a wiki or video open without leaving the game.
What it does
The browser opens as a Steam-style overlay inside the game window. Multiple windows can be dragged and resized, and tabs are supported. The address bar offers back, forward, reload and home buttons, find-in-page and per-tab zoom. Idle tabs are suspended to save resources. The game keeps running while the overlay is open, so a player can read or watch without alt-tabbing or pausing.
Videos can be moved into a Picture-in-Picture overlay that stays on screen and keeps playing after its window is closed, which works as a second monitor inside Minecraft. Split view places two pages side by side. Opacity and backdrop are adjustable, and the overlay can be toggled with a rebindable hotkey, Shift+Tab by default, set in the in-game settings menu.
OverCastUI is published for Fabric only, across six game versions: 1.21.1, 1.21.11, 26.1, 26.1.1, 26.1.2 and 26.2. It is client-side only, so a server does not need it and players can join a server without installing it. The mod is released under a custom license and is not open source.
Key features
Chromium web browser
A full browser built on Chromium, with tabs, an address bar and find-in-page inside the game.
Picture-in-Picture overlay
Videos and pages can float in a resizable overlay that keeps playing after its window is closed.
Split view
Two pages can be shown side by side in the same window while the game keeps running.
Customizable overlay and hotkey
Opacity, backdrop and a rebindable toggle key, set from the in-game settings menu, control how the overlay appears.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
OverCastUI is a Fabric client mod whose files cover 1.21.1 – 26.2, under a custom license that is not open source. Web Chat is also client-side only on Fabric, covers 1.21.1 – 26.3, and is open source under the Apache License 2.0, but it is a chat tool rather than a browser overlay. BrowserMCEF is client-side only on Fabric for 26.2 – 26.3 and is open source under the MIT License, so it fits only the newest game versions.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| OverCastUI | Fabric | 1.21.1 – 26.2 | Client-side only | 2026-07-14 |
| Web Chat | Fabric | 1.21.1 – 26.3 | Client-side only | 2026-09-23 |
| BrowserMCEF | Fabric | 26.2 – 26.3 | Client-side only | 2026-10-06 |
Questions
Does OverCastUI need Fabric API?
Does OverCastUI have to be installed on the server?
Which game versions does OverCastUI support?
In the catalog
OverCastUI is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 13,894 mods support Minecraft 26.2.
More from merenotnoone
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What the author says
A Steam Overlay-style Chromium browser, built into Minecraft. Browse the web without alt-tabbing or pausing your game. Client-side only, Fabric. Description Whether you want an in-game browser to keep a wiki open, a Steam-style web overlay to watch videos while you play, or picture-in-picture for a stream on your…
Official listing
- Modrinth page
- modrinth.com/mod/overcastui
- Owner
- merenotnoone
- Published
- 2026-07-04
- Updated on Modrinth
- 2026-07-14
- Facts verified
- 2026-10-15