The complete API reference for Deno: runtime APIs available in the Deno namespace, supported web platform APIs, and the Node.js built-in modules Deno provides for compatibility. Non-standard APIs in the global Deno namespace: file system, network, subprocesses, testing, FFI, and more. Bundler Bundle TypeScript and JavaScript code, along with their dependencies, into a single file. Cloud Tools for managing state, scheduling tasks, and interacting with key-value stores. Errors Error types and utilities for handling exceptions and custom error scenarios. Fetch HTTP client for fetching data across a network. FFI Foreign Function Interface. File System File System APIs for working with files, directories, and file metadata. GPU GPU programming and rendering. HTTP Server Handling HTTP requests, serving responses, and managing server behavior. I/O Interfaces for reading, writing, seeking, and managing resources. Jupyter Create interactive notebooks and execute code cells. Linter Interfaces and helpers for writing and testing custom lint rules. Network A wide range of networking tasks, from low-level connections to high-level server creation. Permissions Permission system controls access to resources (e.g., file system, network, environment variables). Runtime System-related functionality, process management, and observability. Subprocess Spawn and manage child processes, execute commands, and collect output. Telemetry OpenTelemetry observability integration tools. Testing Robust testing and benchmarking capabilities to ensure code quality and performance. WebSockets Enable real-time communication between clients and servers using WebSockets. Web platform standards implemented by Deno: fetch, streams, workers, crypto, and other browser-compatible APIs. Cache Tools for caching and managing data. Canvas Create, transform, and display images and graphics within the HTML element. Crypto Cryptographic functionality for secure communication, data protection, and key management. Encoding Handle character encoding, decoding, and binary data conversion. Events Handle events and interactions. Fetch HTTP client for fetching data across a network. File File and data manipulation tools. Geometry Interfaces Module API GPU GPU programming and rendering. I/O Interfaces for reading, writing, seeking, and managing resources. Intl Tools for internationalization and localization. Messaging Facilitate communication between different parts of an application, allowing data exchange and coordination. Performance Measure, analyze, and optimize application performance. Platform A set of essential interfaces and functions to interact with the browser environment. Storage Store data locally within the browser. Streams Manage data streams, queuing strategies, and transformations. URL Manipulate URLs, extract data from URLs and manage query parameters. Wasm Efficiently execute computationally intensive tasks. WebSockets Enable real-time communication between clients and servers using WebSockets. Workers Run script operations in background threads. Node.js built-in modules supported in Deno for backwards compatibility, importable via the node: scheme. node:assert The node:assert module provides a set of assertion functions for verifying invariants. node:async_hooks We strongly discourage the use of the async_hooks API. node:buffer Buffer objects are used to represent a fixed-length sequence of bytes. node:child_process The node:child_process module provides the ability to spawn subprocesses in a manner that is similar, but not identical, to popen(3) .

node:cluster Deno compatibility All exports are non-functional stubs. node:console The node:console module provides a simple debugging console that is similar to the JavaScript console mechanism provided by web browsers. node:crypto The node:crypto module provides cryptographic functionality that includes a set of wrappers for OpenSSL's hash, HMAC, cipher, decipher, s... node:dgram The node:dgram module provides an implementation of UDP datagram sockets. node:diagnostics_channel The node:diagnostics_channel module provides an API to create named channels to report arbitrary message data for diagnostics purposes. node:dns The node:dns module enables name resolution. node:dns/promises The dns.promises API provides an alternative set of asynchronous DNS methods that return Promise objects rather than using callbacks. node:domain Deno compatibility All exports are non-functional stubs. node:events Much of the Node.js core API is built around an idiomatic asynchronous event-driven architecture in which certain kinds of objects (calle... node:fs The node:fs module enables interacting with the file system in a way modeled on standard POSIX functions. node:fs/promises The fs/promises API provides asynchronous file system methods that return promises. node:http To use the HTTP server and client one must import the node:http module. node:http2 The node:http2 module provides an implementation of the HTTP/2 protocol. node:https HTTPS is the HTTP protocol over TLS/SSL. node:inspector Deno compatibility console is supported. node:inspector/promises The node:inspector/promises module provides an API for interacting with the V8 inspector. node:net Stability: 2 - Stable The node:net module provides an asynchronous network API for creating stream-based TCP or IPC servers ( createServe... node:os The node:os module provides operating system-related utility methods and properties. node:path The node:path module provides utilities for working with file and directory paths. node:perf_hooks This module provides an implementation of a subset of the W3C Web Performance APIs as well as additional APIs for Node.js-specific perfor... node:punycode **The version of the punycode module bundled in Node.js is being deprecated. node:querystring The node:querystring module provides utilities for parsing and formatting URL query strings. node:readline The node:readline module provides an interface for reading data from a Readable stream (such as process.stdin ) one line at a time. node:readline/promises node:repl Deno compatibility All symbols are not supported. node:sea Deno compatibility All symbols are not supported. node:sqlite Deno compatibility This module has been added in Deno v2.2. node:stream A stream is an abstract interface for working with streaming data in Node.js. node:stream/consumers The utility consumer functions provide common options for consuming streams. node:stream/promises node:stream/web node:string_decoder The node:string_decoder module provides an API for decoding Buffer objects into strings in a manner that preserves encoded multi-byte UTF... node:test The node:test module facilitates the creation of JavaScript tests. node:test/reporters The node:test/reporters module exposes the builtin-reporters for node:test . node:timers The timer module exposes a global API for scheduling functions to be called at some future period of time. node:timers/promises The timers/promises API provides an alternative set of timer functions that return Promise objects. node:tls The node:tls module provides an implementation of the Transport Layer Security (TLS) and Secure Socket Layer (SSL) protocols that is buil... node:trace_events Deno compatibility All exports are non-functional stubs. node:tty The node:tty module provides the tty.ReadStream and tty.WriteStream classes. node:url The node:url module provides utilities for URL resolution and parsing. node:util The node:util module supports the needs of Node.js internal APIs. node:util/types node:v8 Deno compatibility cachedDataVersionTag and getHeapStatistics , serialize and deserialize are supported. node:vm The node:vm module enables compiling and running code within V8 Virtual Machine contexts. node:wasi Deno compatibility All exports are non-functional stubs. node:worker_threads The node:worker_threads module enables the use of threads that execute JavaScript in parallel. node:zlib The node:zlib module provides compression functionality implemented using Gzip, Deflate/Inflate, and Brotli.