Deno, the drop-in JavaScript runtime for Node developers

Deno is a fast, open-source, fully Node-compatible JS runtime with TypeScript and everything else you need baked right in.
Faster than Node; more stable than Bun.
Built-in tools: package manager, test runner, formatter, linter, task runner, type checker, coverage tool, workspace manager, benchmarker, doc generator, jupyter kernel, compiler, desktop app builder.
Paste this into any coding agent.
Claude Code · Codex · Gemini CLI · OpenCode · Cursor · Pi · <your agent>
>Read deno.com/agents.md and set up Deno in this project
18-package dependency tree · isolated caches, scripts disabled · Apple M5 · Deno 2.9 canary, npm (Node v26.5), Bun 1.4 canary
Available today: Temporal · Set methods · Iterator helpers · Promise.try · Float16Array
Shut down the most common ways a dependency turns hostile.
Scope what a single program can do, and deny-list the rest.
Govern permissions, and keep a record of every call.
memory, large responses
p99 latency, realworld
HTTP: 100 concurrent connections · AMD EPYC x86_64, pinned cores · oha, median of 3 runs, uncompressed · Deno.serve (Deno 2.9), Bun.serve (Bun 1.4), node:http (Node v26). Startup, install & streaming: Apple M5 · hyperfine means / in-process medians · Deno 2.9 canary, Node v26.5, Bun 1.4 canary. Results vary by workload and hardware.
…and any platform that runs a Linux, macOS, or Windows binary.
Or run it on the platform we built for it.
Trusted in production by teams at