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Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

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Bun bun-v1.2.21

Bun: bun-v1.2.21 Release

Release date:

August 25, 2025

Previous version:

bun-v1.2.20 (released August 10, 2025)

Magnitude:

11,989 Diff Delta

Contributors:

6 total committers

Data confidence:

Commits:

99 Features Released with bun-v1.2.21

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Top Contributors in bun-v1.2.21

alii

Jarred-Sumner

robobun

RiskyMH

sosukesuzuki

creationix

Directory Browser for bun-v1.2.21

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Release Notes Published

To install Bun v1.2.21 ```bash curl -fsSL https://bun.sh/install | bash

or you can use npm

npm install -g bun


Windows:
```bash
powershell -c "irm bun.sh/install.ps1|iex"

To upgrade to Bun v1.2.21: bash bun upgrade