Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust and Tokio.
Deno is suitable for utility scripts that may have been historically written with Bash or Python.
This is free and open source software.
Key Features
- Web compatible where possible, for example through usage of ES modules, and support for fetch.
- Secure by default. No file, network, or environment access (unless explicitly enabled).
- Supports TypeScript out of the box.
- Ships a single executable (deno). Given a URL to a Deno program, it is runnable with nothing more than the ~25 megabyte zipped executable. Deno explicitly takes on the role of both runtime and package manager. It uses a standard browser-compatible protocol for loading modules: URLs.
- Has built-in utilities like a code formatter (deno fmt), a linter (deno lint), and a test runner (deno test).
- Has a set of reviewed (audited) standard library that are guaranteed to work with Deno.
- Can bundle scripts into a single JavaScript file.
- Fetch and cache remote code upon first execution, and never update it until the code is run with the –reload flag.
- Modules/files loaded from remote URLs are intended to be immutable and cacheable.
Website: deno.com
Support: GitHub Code Repository
Developer: Deno authors
License: MIT License
Deno is written in Rust and JavaScript. Learn Rust with our recommended free books and free tutorials. Learn JavaScript with our recommended free books and free tutorials.
Related Software
| JavaScript Runtime Environments | |
|---|---|
| Node.js | Hugely popular cross-platform JavaScript run-time environment |
| Bun | Fast JavaScript runtime designed as a drop-in replacement for Node.js. |
| Deno | Simple, modern and secure runtime for JavaScript and TypeScript |
| WasmEdge | High-performance, and extensible WebAssembly runtime |
| workerd | JavaScript and WebAssembly server runtime |
| LLRT | Designed for fast, resource-efficient serverless applications |
| txiki.js | Small and powerful JavaScript runtime |
| JerryScript | JavaScript engine for the Internet of Things |
| GraalJS | ECMAScript-compliant JavaScript engine |
| Window.js | JavaScript runtime for desktop graphics programming |
| Blueboat | Multi-tenant serverless JavaScript runtime |
| lo | Successor project to Just |
| StarlingMonkey | SpiderMonkey-based JavaScript runtime |
| Just | Very small v8 JavaScript runtime |
Read our verdict in the software roundup.
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