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Top Flutter Code Generator and Serialization (JSON) packages

Last updated: June 8, 2024

Code generation is a technique for automatically generating code based on certain input data or rules. In Flutter, code generation is used for a variety of purposes, such as generating code for working with JSON data, generating code for working with databases, and generating code for working with web services. Code generation can make it easier to write and maintain code, as it can automate repetitive tasks and reduce the amount of manual coding that is required.

JSON serialization is the process of converting data from a structured format, such as a JSON object, into a format that can be easily stored or transmitted. In Flutter, JSON serialization is often used for working with data that comes from web services or other external sources. The Flutter framework provides built-in support for serializing and deserializing JSON data, making it easy to work with JSON in your Flutter applications. There are various packages which provides essential tools for encoding Dart objects into JSON and decoding JSON back into Dart objects as well as parsing JSON. This capability proves crucial when fetching data from APIs, managing configuration files, or persisting local app state.

Annotations are a way of adding metadata or additional information to your code. In Flutter, annotations are typically used to provide additional information about the types of data that are used in your code, such as the types of objects that are returned by a function or the types of parameters that are accepted by a method. Annotations can be useful for providing additional context to your code, and can also be used by tools such as IDEs to provide better code completion and error checking.

The complete list of Dart and Flutter Code Generation, JSON Serialization and Annotation packages is provided below.


freezed
Dart 3 compatible 👍 3.7K
Maintenance Status: Good

Code generation for immutable classes that has a simple syntax/API without compromising on the features.

json_serializable
Dart 3 compatible 👍 3.4K
Maintenance Status: Good

Automatically generate code for converting to and from JSON by annotating Dart classes.

flutter_gen
Dart 3 compatible 👍 1.32K
Maintenance Status: Good

The Flutter code generator for your assets, fonts, colors, … — Get rid of all String-based APIs.

json_annotation
Dart 3 compatible 👍 1.05K
Maintenance Status: Good

Classes and helper functions that support JSON code generation via the 'json_serializable' package.

pigeon
Dart 3 compatible 👍 937
Maintenance Status: Good

Code generator tool to make communication between Flutter and the host platform type-safe and easier.

freezed_annotation
Dart 3 compatible 👍 411
Maintenance Status: Good

Annotations for the freezed code-generator. This package does nothing without freezed too.

hive_generator
Dart 3 compatible 👍 342
Maintenance Status: Good

Extension for Hive. Automatically generates TypeAdapters to store any class.

riverpod_generator
Dart 3 compatible 👍 337
Maintenance Status: Good

A code generator for Riverpod. This both simplifies the syntax empowers it, such as allowing stateful hot-reload.

mobx_codegen
Dart 3 compatible 👍 285
Maintenance Status: Good

Code generator for MobX that adds support for annotating your code with @observable, @computed, @action and also creating Store classes.

ffigen
Dart 3 compatible 👍 264
Maintenance Status: Good

Generator for FFI bindings, using LibClang to parse C, Objective-C, and Swift files.

dart_json_mapper
Dart 3 compatible 👍 259
Maintenance Status: Good

This package allows programmers to annotate Dart objects in order to serialize / deserialize them from / to JSON.

functional_widget
Dart 3 compatible 👍 242
Maintenance Status: Good

A code generator that generates widget classes from their implementation as a function.

dart_mappable
Dart 3 compatible 👍 233
Maintenance Status: Good

Improved json serialization and data classes with full support for generics, inheritance, customization and more.

flutter_gen_runner
Dart 3 compatible 👍 214
Maintenance Status: Good

The Flutter code generator for your assets, fonts, colors, … — Get rid of all String-based APIs.

copy_with_extension_gen
Dart 3 compatible 👍 180
Maintenance Status: Good

Automatically generating 'copyWith' extensions code for classes with '@CopyWith()' annotation.

source_gen
Dart 3 compatible 👍 150
Maintenance Status: Good

Source code generation builders and utilities for the Dart build system

retrofit_generator
Dart 3 compatible 👍 136
Maintenance Status: Good

retrofit generator is an dio client generator using source_gen and inspired by Chopper and Retrofit.

built_value_generator
Dart 3 compatible 👍 134
Maintenance Status: Good

Value types with builders, Dart classes as enums, and serialization. This library is the dev dependency.

riverpod_annotation
Dart 3 compatible 👍 125
Maintenance Status: Good

A package exposing annotations for riverpod_generator

graphql_codegen
Dart 3 compatible 👍 109
Maintenance Status: Good

Simple, opinionated, codegen library for GraphQL. It allows you to generate serializers and client helpers to easily call and parse your data.

auto_mappr
Dart 3 compatible 👍 99
Maintenance Status: Good

Code generation for mapping between different objects with ease.

injectable_generator
Dart 3 compatible 👍 95
Maintenance Status: Good

Injectable is a convenient code generator for get_it. Inspired by Angular DI, Guice DI and inject.dart.

protoc_plugin
Dart 3 compatible 👍 78
Maintenance Status: Good

A protobuf protoc compiler plugin used to generate Dart code.

jnigen
Dart 3 compatible 👍 66
Maintenance Status: Good

A Dart bindings generator for Java and Kotlin that uses JNI under the hood to interop with Java virtual machine.

flutter_asset_generator
Dart 3 compatible 👍 64
Maintenance Status: Good

Generates the resource file by scanning assets defined in the pubspec.yaml, imitation R file short name.

stacked_generator
Dart 3 compatible 👍 38
Maintenance Status: Good

Stacked Generator is a package dedicated to reduce the boilerplate required to setup a stacked application

drift_dev
Dart 3 compatible 👍 36
Maintenance Status: Good

Dev-dependency for users of drift. Contains the generator and development tools.

super_annotations
Dart 3 compatible 👍 35
Maintenance Status: Good

Write your code generation functions naturally alongside your normal code. Define and use custom annotations in the same file or project.

pubspec_generator Card Image
pubspec_generator
Dart 3 compatible 👍 32
Maintenance Status: Good

Code generator pubspec.yaml.g.dart from pubspec.yaml. Just import `pubspec_generator` and then run `dart run build_runner build`

embed
Dart 3 compatible 👍 26
Maintenance Status: Good

Code generation for embedding arbitrary file content into Dart code.

ferry_generator
Dart 3 compatible 👍 23
Maintenance Status: Good

Generated types for Ferry GraphQL Client

cached_annotation
Dart 3 compatible 👍 22
Maintenance Status: Good

Annotations for the Cached code-generator. This package does nothing without Cached.

sqfentity_gen
Dart 3 compatible 👍 19
Maintenance Status: Good

SqfnEntity Model Generator. SQLite ORM for Flutter lets you build and execute SQL commands easily and quickly with the help of fluent methods similar to .Net Entity Framework.

functional_data
Dart 3 compatible 👍 17
Maintenance Status: Good

Annotations and helpers for lenses for code generated with the 'function_data_generator' package.

gql_build
Dart 3 compatible 👍 15
Maintenance Status: Good

Useful builders for your GraphQL SDL and documents. Based on package:gql_code_builder and package:build

widgetbook_annotation
Dart 3 compatible 👍 13
Maintenance Status: Good

A package featuring the annotations used by widgetbook_generator.

morphy
Dart 3 compatible 👍 9
Maintenance Status: Good

Provides a clean class definition with extra functionality including; copy with, json serializable, tostring, equals that supports inheritance and polymorphism

dogs_core
Dart 3 compatible 👍 6
Maintenance Status: Good

universal object mapping and serialization library with a focus on dx.

chopper_built_value
Dart 3 compatible 👍 6
Maintenance Status: Good

A built_value based Converter for Chopper.

gql_code_builder
Dart 3 compatible 👍 4
Maintenance Status: Good

Dart code builders taking *.graphql documents and SDL to build useful classes.

realm_generator
Dart 3 compatible 👍 3
Maintenance Status: Good

Generates RealmObject classes from Realm data model classes. This package is part of the official Realm Flutter and Realm Dart SDKs.

borsh
Dart 3 compatible 👍 3
Maintenance Status: Good

Implementation of the borsh serialization scheme

brick_offline_first_with_rest_build
Dart 3 compatible 👍 1
Maintenance Status: Good

Code generation library for the Brick Offline First Domain using REST

borsh_annotation
Dart 3 compatible 👍 1
Maintenance Status: Good

Annotation used to make a Dart object borsh serializable.

simple_assets_generator
Dart 3 compatible 👍 0
Maintenance Status: Good

Assets generator package.

carp_study_generator
Dart 3 compatible 👍 0
Maintenance Status: Good

Utilities for managing CARP Mobile Sensing studies, including generating and uploading a study protocol, informed consent, translations, and messages.

brick_sqlite_generators
Dart 3 compatible 👍 0
Maintenance Status: Good

Code generation library for the SQLite providers, models, and adapters in Brick

brick_rest_generators
Dart 3 compatible 👍 0
Maintenance Status: Good

Code generation library for the REST providers, models, and adapters in Brick

brick_offline_first_with_graphql_build
Dart 3 compatible 👍 0
Maintenance Status: Good

Code generation library for the Brick Offline First Domain using GraphQL

brick_offline_first_build
Dart 3 compatible 👍 0
Maintenance Status: Good

Code generation library for the Brick Offline First Domain

brick_json_generators
Dart 3 compatible 👍 0
Maintenance Status: Good

Code generation library for the JSON-like providers, models, and adapters in Brick

brick_graphql_generators
Dart 3 compatible 👍 0
Maintenance Status: Good

Code generation library for the GraphQL providers, models, and adapters in Brick

dson_adapter
Dart 3 compatible 👍 29
Maintenance Status: Average

Convert JSON to Dart Class withless code generate(build_runner)

isar_generator
Dart 3 compatible 👍 27
Maintenance Status: Average

Code generator for the Isar Database. Finds classes annotated with @Collection.

freezer
Dart 3 compatible 👍 24
Maintenance Status: Average

Provides the easiest and most productive automatic generation of model objects from JSON files.

gate_generator
Dart 3 compatible 👍 21
Maintenance Status: Average

Dependency Injection generator for your flutter/dart applications. This uses annotations and build_runner.

sum_types
Dart 3 compatible 👍 13
Maintenance Status: Average

sum_types and sum_types_generator packages together define a code generator enabling sum-types in Dart.

kiwi_generator
Dart 3 compatible 👍 11
Maintenance Status: Average

Generates dependency injection code using the kiwi package to reduce development time.

flutter_ast
Dart 3 compatible 👍 5
Maintenance Status: Average

A Pure Dart File to Ast Serializer/Deserializer.

typed_json
Dart 3 compatible 👍 2
Maintenance Status: Average

A library intended to bring manual JSON serialization to the Dart projects of all scales.

envify_generator
Dart 3 compatible 👍 2
Maintenance Status: Average

Code generator for envify, a better tool to handle environment variables.

flamingo_generator
Dart 3 compatible 👍 1
Maintenance Status: Average

Automatically generate code for converting flamingo JSON by annotating Dart classes.

flamingo_annotation
Dart 3 compatible 👍 1
Maintenance Status: Average

Automatically generate code for converting flamingo JSON by annotating Dart classes.

brick_build
Dart 3 compatible 👍 1
Maintenance Status: Average

Code generation library and interface for Brick components. Useful for creating serdes generators for adapters.

json_model
Dart 3 compatible 👍 40
Maintenance Status: Poor

Gernerating Dart model class from Json files with one command.

modular_codegen
Dart 3 compatible 👍 24
Maintenance Status: Poor

Code Generate for flutter_modular. Inject Automation. Annotation @Inject, @Param and @Data.

simple_json
Dart 3 compatible 👍 21
Maintenance Status: Poor

Simple way to dynamically convert from and to JSON using build-time generators given a type.

dart_json_mapper_mobx
Dart 3 compatible 👍 7
Maintenance Status: Poor

This is a dart-json-mapper complementary package provides support for MobX Stores to persist as JSON.

json_to_dart
Dart 3 compatible 👍 5
Maintenance Status: Poor

A library that generates Dart classes (parse and generator included) from a json string.

dart_json_mapper_flutter
Dart 3 compatible 👍 4
Maintenance Status: Poor

This is a dart-json-mapper complementary package provides support for flutter types in order to serialize / deserialize them from / to JSON.

doc_widget_annotation
Dart 3 compatible 👍 2
Maintenance Status: Poor

This is a simple package that contains annotations to generate code in doc_widget

dart_json_mapper_fixnum
Dart 3 compatible 👍 1
Maintenance Status: Poor

This is a dart-json-mapper complementary package provides support for fixnum package types in order to serialize / deserialize them from / to JSON.

dart_json_mapper_built
Dart 3 compatible 👍 1
Maintenance Status: Poor

This is a dart-json-mapper complementary package provides support for built_collection package types in order to serialize / deserialize them from / to JSON.

simple_auth_generator
Dart 3 compatible 👍 0
Maintenance Status: Poor

simple_auth is an http client generator using source_gen and inspired from retrofit and chopper

widgetbook_generator
👍 13
Maintenance Status: Good

A package to automate setup and maintenance of the widgetbook package by using code generation.

json_to_model
👍 46
Maintenance Status: Average

Generate model class from Json file.

framy_annotation
👍 28
Maintenance Status: Poor

Annotations for framy_generator. This package does nothing without framy_generator.

json_utilities
👍 7
Maintenance Status: Poor

A collection of json utilities to enhance the experience of working with json based models.