Letterboxing
by copythenerd
Letterboxing lets players add customizable letter- and pillarboxing bars to the Minecraft screen, changing the framing of the game view.
What it does
The mod draws black bars over the top and bottom or the sides of the game window, which narrows the visible area to a chosen aspect ratio. Players can set the shape and amount of the bars, and the effect can give a more cinematic look or match a phone's aspect ratio.
The mod works by modifying existing code through Fabric API's Mixin system, so another mod that touches the same lines can cause conflicts. For that reason it includes an option to stop Mixins from auto-adjusting individual interface elements, such as the boss bar and the chat window. Letterboxing requires Fabric API and Mod Menu for access to its configuration menu, and it is distributed under the MIT License with its source code public.
Key features
Customizable letterboxing
Black bars can be set up for letterboxing or pillarboxing, with settings for their shape and size.
Per-element adjustment control
An option turns off automatic adjustment for several interface parts, including the boss bar, the chat window and the subtitles.
Mod Menu configuration
Settings are reached through the configuration screen that Mod Menu provides.
Phone aspect ratio
The effect can frame the game to the shape of a phone screen, a use the author suggests for the mod.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Cinematic framing
Players who want a wide, film-like view of their world can add bars to narrow the visible area.
Phone-shaped view
Players can match the game view to a phone's aspect ratio when playing on a tall display.
Who it’s for: Players who want to change the framing of the game window, and anyone troubleshooting a conflict with another mod that changes the same interface elements.
Questions
Does Letterboxing need Fabric API?
Why is there an option to stop auto-adjusting interface elements?
Which game versions does Letterboxing support?
In the catalog
Letterboxing is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
For instructions on installing mods with Fabric, please refer to the Fabric Documentation. To make the mod work, you also need to install its dependencies. This mod requires the Fabric API, as well as Mod Menu to access its configuration menu.
Official listing
- Modrinth page
- modrinth.com/mod/letterboxing
- Owner
- copythenerd
- Published
- 2025-09-23
- Updated on Modrinth
- 2026-08-20
- Facts verified
- 2026-10-15