Yes. Bun 1.1 brought its JavaScript runtime, test runner, package manager and bundler to Windows 10 and later. Bun announced the release on April 1, 2024, under the playful headline “Bundows is here.” The Windows launch was only part of the release: Bun also introduced Bun Shell and a built-in Glob API, among other changes.
What did Bun 1.1 support on Windows?
Bun described itself as an all-in-one toolkit for running, building, testing and debugging JavaScript and TypeScript. With version 1.1, Bun said all four core components—the runtime, test runner, package manager and bundler—worked on Windows 10 and later. The release announcement is Bun’s own account of compatibility, not an independent certification. Bun 1.1 announcement
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Bun reported that its Windows build passed 98% of its macOS and Linux test suite. That percentage refers to Bun’s test suite; it does not mean every Node.js project or dependency will work unchanged on Windows.
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Bun’s April 2024 announcement published Windows comparisons for package installation and command execution. These are vendor-reported release-era benchmarks, not independent tests or measurements of current Bun, npm, Yarn or Node.js releases. Bun said the Vite React app installation comparison used scripts configured with --ignore-scripts. Bun 1.1 announcement
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| Task | Bun’s reported comparison | Context |
|---|---|---|
| Install a Vite React app | bun install was 18 times faster than Yarn and 30 times faster than npm |
Windows; scripts configured with --ignore-scripts; Bun’s 2024 release announcement |
| Run package scripts | bun run was 11 times faster than npm run |
Windows; Bun’s 2024 release announcement |
| Run package executables | bunx was 11 times faster than npx |
Windows; Bun’s 2024 release announcement |
Those figures describe the specific comparisons Bun published. They do not establish how Bun performs with a different application, machine, dependency tree or current tool version. For a project decision, test the same workload and configuration on your own system.
What else was new in Bun 1.1?
Bun Shell
Bun introduced Bun Shell, a cross-platform shell-like tool callable from JavaScript or TypeScript using Bun.$. It provides familiar shell syntax and built-in utilities, so scripts can invoke shell-style commands from within a JavaScript or TypeScript program. Bun 1.1 announcement
Rank #2
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Windows executable handling
The release added .bunx, a cross-filesystem symlink format Bun said could start scripts or executables using Bun or Node.js. Bun described it as a way to address Windows differences involving symlinks and shebangs, without requiring separate .cmd, .sh and .ps1 variants for each executable.
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Glob, Semver and runtime APIs
Bun 1.1 added built-in Glob and Semver APIs and introduced APIs including server.url, server.requestIP() and import.meta.env. The announcement also described changes to Node.js APIs to use Windows system calls, citing fs.readdir() as one example.
Rank #3
- WINDOWS 11 | STABLE PERFORMANCE: Powered by Intel Celeron N4020 processor and Windows 11 system, this laptop delivers stable performance for everyday computing tasks. It supports web browsing, online learning, document editing, email communication, and basic office work with optimized power efficiency, providing a practical and reliable experience for essential daily use for daily use.
- 15.6” FHD IPS DISPLAY: Features a 15.6-inch Full HD IPS display with narrow bezels, offering wider viewing angles and clearer image details compared to standard panels. The improved screen-to-body ratio enhances visual experience for study, reading, document work, and video playback, making it suitable for both productivity and entertainment use.
- 4GB DDR4 + 128GB eMMC STORAGE: Equipped with 4GB DDR4 memory and 128GB eMMC storage for everyday basics such as browsing, documents, email, and online learning platforms. The built-in TF card slot supports storage expansion up to 1TB, giving you more flexibility for files, photos, videos, and daily documents. TF card not included.
- CONNECTIVITY & PORTS: Includes 1× TF card slot, 2× USB 3.2 Gen1 ports, and 2× full-featured Type-C ports (USB 3.2 Gen1). The Type-C ports support data transfer, charging, and video output, enabling flexible connection with external devices such as monitors, storage, and peripherals for daily work and study use.
- LIGHTWEIGHT DESIGN | ONLINE COMMUNICATION: Designed with a slim, portable profile, this laptop is easy to carry for school, commuting, and travel. A built-in 1MP front camera supports online classes, video meetings, remote communication, and everyday conferencing. The 3300mAh battery works with the low-power system design to support practical daily use, while thermal optimization helps maintain quieter operation during extended tasks.
Node.js compatibility work
The release announcement listed compatibility work including HTTP/2 client APIs, recursive fs.readdir(), IPC between Bun and Node.js processes, and other Node API additions and fixes. Bun’s stated aim in the announcement was to be “a drop-in replacement for Node.js.” That is Bun’s goal, not a guarantee that every project can switch without changes; check the APIs and dependencies your application actually uses. Bun 1.1 announcement
What does the April 2024 announcement establish today?
It records what Bun said about version 1.1 at launch—not the status of the latest release. Bun’s blog index lists releases after 1.1, so current Windows support, compatibility and performance should be checked against the release materials for the version you plan to use. Bun blog
For the historical question posed by Bytes #276—when Bun would support Windows—the answer was Bun 1.1, announced April 1, 2024. For choosing a runtime or package workflow now, verify the current release and test your own application rather than treating launch-era benchmarks as a present-day comparison.
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