bun run & bunx in Bun

From the Bun cheat sheet · Running Scripts & Files · verified Jul 2026

bun run & bunx

Run files, package.json scripts, and remote packages

bash

# Run a TypeScript/JavaScript file
bun run index.ts
bun index.ts          # "run" is optional

# Run package.json scripts
bun run dev
bun run build

# Execute a package (like npx)
bunx cowsay "Hello!"
bunx --bun vite       # Force Bun runtime

💡 bun --watch restarts the whole process on changes; --hot reloads modules in-place

⚡ bun run is 30x faster than npm run — it skips shell interpretation overhead

📌 bunx --bun forces packages like Vite or Prisma to run on Bun instead of Node

🟢 Bun auto-loads .env files — no dotenv package needed

runbunxscriptswatch

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