bun-outdated

List all outdated dependencies in the current project

$ bun outdated

$ bun outdated [package]

$ bun outdated "[pattern]"

$ bun outdated [[-F|--filter]] "[workspace_pattern]"

$ bun outdated [[-r|--recursive]]

bun outdated [--json]

--json
    Output machine-readable JSON array of outdated packages with name, current, and latest versions.

bun outdated is a command from the Bun toolkit, a fast JavaScript runtime, bundler, and package manager designed as a drop-in replacement for Node.js, npm, and Webpack.

It scans your project's package.json and bun.lockb files to identify dependencies with available updates. The command compares installed versions against the latest versions from the npm registry (or configured registries), highlighting packages where the latest version exceeds the current one.

By default, it displays a color-coded table with columns for package name, current version, and latest version. This enables quick visual identification of updates for security fixes, new features, or performance gains.

Bun's implementation leverages its speedy dependency resolution, making it significantly faster than equivalents like npm outdated or yarn outdated.

Run it in your project root:
bun outdated

For automation or scripting, use JSON output:
bun outdated --json

The JSON array contains objects like: {"name": "pkg", "current": "1.0.0", "latest": "2.0.0"}.

Ideal for CI/CD pipelines or pre-commit hooks to enforce dependency freshness.

Requires Bun installation (>=0.5.0); best with bun.lockb present. Uses npm registry by default; respects .bunfig.toml for custom registries. Does not auto-update—use bun update or bun add -g afterward.

pkg@current → latest
lodash 4.17.21 → 4.17.21 (up to date)
axios 1.4.0 → 1.6.0
Colors indicate update urgency.

[
{"name": "axios", "current": "1.4.0", "latest": "1.6.0"}
]

Introduced in Bun 0.1.0 (September 2022) by Jarred Sumner as part of Bun's package manager. Evolved with Bun 1.0 (2024) for production stability; JSON output added early for scripting support.

bun install(1), bun update(1), npm outdated(1), yarn outdated(1)