Red Strap

A fast, lightweight Roblox bootstrapper and mod manager — rewritten in Rust.

Forked from Froststrap.

If you'd like to support the project, consider giving this repository a star!

Caution

Download Red Strap only from this repository's releases. Binaries from any other source are not affiliated with us and may be malicious.

---

What is Red Strap?

Red Strap replaces the default Roblox launcher with a bootstrapper that is:

• Fast — installs, patches, and launches with minimal overhead; the settings UI is a native app that starts instantly and idles at ~0% CPU.
• Customizable — Fast Flag editor with profiles and allowlist validation, file mods, cursor sets, UI recoloring, custom fonts, and per-game shortcuts.
• Observable — live session tracking, playtime counter, Discord Rich Presence (including in-game [RedStrapRPC]), and a built-in log viewer.
• Low-maintenance — silent background self-updates, channel management, and one-click reinstall/repair.

Red Strap is a clean-room Rust rewrite inspired by tools like Bloxstrap. It keeps the workflow you know (deploy Roblox, apply your tweaks, launch, watch) while rebuilding every layer for speed and reliability.

Screenshots

Screenshots coming soon — the UI is a native red + dark desktop app with ten settings pages: Overview, Launch, Performance, Fast Flags, Mods, Integrations, Shortcuts, Appearance, Logs, and About.

Download

Grab RedStrap.exe from the latest release, run it, and Roblox will install and launch. The settings UI (RedStrap-Settings.exe) ships alongside it and opens from the launcher, the Start Menu shortcut, or the system tray.

Requirements: Windows 10/11 x64. (The core builds on Linux/macOS for development, but launching Roblox itself is Windows-only.)

Features

Area	Highlights
Deploy	Channel + version pinning, parallel downloads with resume, hash verification, staging, automatic repair
Launch	Player/Studio, custom args, multi-instance, process priority, CPU affinity, proxy support
Performance	FPS cap, rendering backend (Vulkan/OpenGL/D3D11), MSAA, graphics-mode flags, GBS overrides, Windows graphics preference
Fast Flags	Search, undo/redo, profiles, import/export, community allowlist validation
Mods	Drag-and-drop ZIP/folder install, per-mod Player/Studio toggles, UI recolor, cursor sets
Presence	Discord Rich Presence with game name, server buttons, account display, and game-driven [RedStrapRPC]
Automation	Auto-rejoin dropped servers, close-on-leave, playtime counter, external-program integrations
Updates	Stable/pre-release channels, background updates, skip-this-version, staged restart

Building from source

Prerequisites: Rust stable 1.76+ (with rustfmt + clippy), and on Linux the GUI system libraries (see ci.yml).

# Debug build
cargo build --workspace

# Optimized release binaries (target/release/RedStrap.exe, RedStrap-Settings.exe)
cargo build --workspace --release

# Tests, lints, formatting (this is what CI runs)
cargo test --workspace
cargo clippy --workspace --all-targets -- -D warnings
cargo fmt --all -- --check

just shortcuts are available too: just build, just release, just check, just clean.

Repository layout

crates/
  core/        Shared library: settings, deployment pipeline, fast flags,
               mods, Roblox protocol/log parsing, Discord IPC, self-updater
  bootstrap/   RedStrap.exe — CLI launcher, installer, session watcher
  desktop/     RedStrap-Settings.exe — native egui settings app
assets/        Application icon (PNG + ICO)
docs/          Architecture and development notes

See docs/ARCHITECTURE.md for how the pieces fit together.

Configuration

All state lives under %LocalAppData%\RedStrap:

• Settings.json — every option the UI exposes (hand-editable; corrupt files are backed up and reset, never crash).
• State.json — UI memory, installed mods, playtime, skipped versions.
• ClientAppSettings.json — the generated fast-flag file Roblox reads.

Logs rotate daily under Logs/ and are viewable live on the Logs page. Set RUST_LOG (e.g. RUST_LOG=debug) to override the log level, or enable Verbose logging on the Logs page.

Contributing

Issues and pull requests are welcome. Please run just check (or the equivalent cargo commands above) before opening a PR — CI denies warnings.

License

Red Strap is licensed under the MIT License. See LICENSE* for the full texts.