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Commonly used packages
Some of the most useful and popular packages, and where you can learn more.

This page lists some of the most popular and useful packages that Dart developers have published. To find more packages — and search core libraries, as well — use the Pub site.

Commonly used packages fall into three groups:

General-purpose packages

The following packages are useful for a wide range of projects.

| Package | Description | Commonly used APIs | | archive | Encodes and decodes various archive and compression formats. | Archive, ArchiveFile, TarEncoder, TarDecoder, ZipEncoder, ZipDecoder | | http | A set of high-level functions and classes that make it easy to consume HTTP resources. | delete(), get(), post(), read() | | intl | Internationalization and localization facilities, with support for plurals and genders, date and number formatting and parsing, and bidirectional text. | Bidi, DateFormat, MicroMoney, TextDirection | | json_serializable | An easy-to-use code generation package. For more information, see JSON Support. | @JsonSerializable | | logging | A configurable mechanism for adding message logging to your application. | LoggerHandler, Level, LogRecord | | mockito | A popular framework for mocking objects in tests. Especially useful if you are writing tests for dependency injection. Used with the test package. | Answering, Expectation, Verification | | path | Common operations for manipulating different types of paths. For more information, see Unboxing Packages: path. | absolute(), basename(), extension(), join(), normalize(), relative(), split() | | quiver | Utilities that make using core Dart libraries more convenient. Some of the libraries where Quiver provides additional support include async, cache, collection, core, iterables, patterns, and testing. | CountdownTimer (quiver.async); MapCache (quiver.cache); MultiMap, TreeSet (quiver.collection); EnumerateIterable (quiver.iterables); center(), compareIgnoreCase(), isWhiteSpace() (quiver.strings) | | shelf | Web server middleware for Dart. Shelf makes it easy to create and compose web servers, and parts of web servers. | Cascade, Pipeline, Request, Response, Server | | stack_trace | Methods for parsing, inspecting, and manipulating stack traces produced by the underlying Dart implementation. Also provides functions to produce string representations of stack traces in a more readable format than the native StackTrace implementation. For more information, see Unboxing Packages: stack_trace. | Trace.current(), Trace.format(), Trace.from() | | stagehand | A Dart project generator. WebStorm and IntelliJ use Stagehand templates when you create a new application, but you can also use the templates from the command line. | Generally used through an IDE or the stagehand command. | | test | A standard way of writing and running tests in Dart. | expect(), group(), test() | | yaml | A parser for YAML. | loadYaml(), loadYamlStream() | {:.table .table-striped .nowrap}

Packages that expand on Dart core libraries {#packages-that-correspond-to-sdk-libraries}

Each of the following packages builds upon a core library, adding functionality and filling in missing features:

| Package | Description | Commonly used APIs | | async | Expands on dart:async, adding utility classes to work with asynchronous computations. For more information, see Unboxing Packages: async part 1, part 2, and part 3. | AsyncMemoizer, CancelableOperation, FutureGroup, LazyStream, Result, StreamCompleter, StreamGroup, StreamSplitter | | collection | Expands on dart:collection, adding utility functions and classes to make working with collections easier. For more information, see Unboxing Packages: collection. | Equality, CanonicalizedMap, MapKeySet, MapValueSet, PriorityQueue, QueueList | |convert | Expands on dart:convert, adding encoders and decoders for converting between different data representations. One of the data representations is percent encoding, also known as URL encoding. | HexDecoder, PercentDecoder | |io | Contains two libraries, ansi and io, to simplify working with files, standard streams, and processes. Use the ansi library to customize terminal output. The io library has APIs for dealing with processes, stdin, and file duplication. | copyPath(), isExecutable(), ExitCode, ProcessManager, sharedStdIn | {:.table .table-striped .nowrap}

Specialized packages

Here are some tips for finding packages that are more specialized, such as packages for mobile (Flutter) and web development.

Flutter packages

See Using packages on the Flutter site. Or use the Pub site to search for Flutter packages.

Web packages

See Web libraries and packages. Or use the Pub site to search for web packages.

Command-line and server packages

See Command-line and server libraries and packages. Or use the Pub site to search for other packages.

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