Quantum Client
by kappader4
Quantum Client is a client-side utility mod for Fabric that replaces the title screen panorama with an animated menu and adds a set of HUD, sprint, zoom, time and font tools.
What it does
On the title screen the vanilla panorama gives way to an interactive parallax starfield that reacts to the cursor with a glow tinted by the active theme. An animated QUANTUM wordmark and a decorative orbit widget that tracks the hovered menu row sit on top, and hovering a row slides it while its color cross-fades. The same background carries over to world select, options and multiplayer screens.
Sixteen built-in accent themes, including Lava, Arctic, Jade, Neon, Matrix and Sakura, recolor the menu, and a HUD element toggles the accent instantly. Sprint helpers cover automatic and omni-directional sprinting, including sprinting in water. A hold-to-zoom key with configurable magnification and a 15×15 pixel-editor crosshair round out the tools, and a time changer, custom font and FPS counter are optional.
Quantum Client is published for Fabric across 1.21.9 – 1.21.11, and only the player's client needs it, because the server is left alone. It is released under All rights reserved, so it is not open source.
Key features
Animated main menu
A parallax starfield, animated wordmark and orbit widget replace the vanilla panorama on the title screen.
Sixteen accent themes
Built-in themes such as Lava, Arctic, Jade, Neon, Ocean and Ash recolor the menu and HUD elements.
Sprint helpers
Automatic and omni-directional sprinting can be enabled in options, including sprinting through water.
Zoom and crosshair
A hold key zooms with easing and scroll-to-adjust magnification, and a pixel editor draws a custom crosshair.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who use the Fabric loader on Minecraft 1.21.9 – 1.21.11 and want a configurable client utility for menus, sprinting, zoom and HUD display. Only the client needs it.
How it compares
Hold to Sprint is open source under the MIT License and runs client-side on Fabric for 1.21.11, while Quantum Client is not open source and adds menu and HUD features. Auto_Sprint is client-side on Fabric for 1.21.11 under All rights reserved and covers sprinting only. Shatter Gui is client-side on Fabric for 1.21 – 1.21.11 under the MIT License and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Quantum Client | Fabric | 1.21.9 – 1.21.11 | Client-side only | 2026-08-22 |
| Hold to Sprint | Fabric | 1.21.11 | Client-side only | 2026-03-26 |
| Auto_Sprint | Fabric | 1.21.11 | Client-side only | 2026-08-03 |
| Shatter Gui | Fabric | 1.21 – 1.21.11 | Client-side only | 2026-04-13 |
Questions
Does Quantum Client need to be installed on the server?
Which Minecraft versions does Quantum Client support?
Can the time changer affect other players?
In the catalog
Quantum Client is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from kappader4
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What the author says
A sleek, lightweight Minecraft utility client for Fabric 1.21.9 – 1.21.11. Movement - AutoSprint - sprints automatically; options for omni-directional sprint and sprinting in water.
Official listing
- Modrinth page
- modrinth.com/mod/quantum-client
- Owner
- kappader4
- Published
- 2026-05-18
- Updated on Modrinth
- 2026-08-22
- Facts verified
- 2026-10-15