YAML Libraries

YAML data serialization libraries for over 40 modern programming languages!!!

Uses the YAML Test Suite
Available in the YAML Playground
Supported by The YAML Company
1.2 Supports YAML 1.2
Actively maintained (updated within the last year)
Pure implementation (no native library dependency)
Safe loading by default (no arbitrary object construction)
Supports merge keys
Preserves comments (round-trip editing)

---

Ada

• AdaYaml

  ---

  Experimental YAML 1.3 implementation in Ada

  MIT

C

• libyaml

  ---

  "C" Fast YAML 1.1

  MIT

• libfyaml 1.2

  ---

  "C" YAML 1.2 processor

  MIT

• libcyaml

  ---

  YAML de/serialization of C data (using libyaml)

  ISC

C++

• rapidyaml

  ---

  Fast C++ YAML parser and emitter

  MIT

• yaml-cpp 1.2

  ---

  C++ YAML 1.2 implementation

  MIT

C#/.NET

• YamlDotNet

  ---

  YAML 1.1/(1.2) library + serialization

  MIT

• yaml-net

  ---

  YAML 1.1 library

• Legivel 1.2

  ---

  F# YAML 1.2 parser

  Unlicense

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Clojure

• clj-yaml

  ---

  YAML encoding and decoding for Clojure

  EPL-1.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Common Lisp

• cl-yaml

  ---

  YAML parser and emitter built on libyaml

Crystal

• YAML

  ---

  YAML 1.1 from the standard library

  Apache-2.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

D

• D-YAML

  ---

  YAML 1.1 library w/ official community support

  BSL-1.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Dart

• yaml

  ---

  YAML package for Dart

  BSD-3-Clause

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Delphi / Free Pascal

• Neslib.Yaml

  ---

  YAML 1.1 Delphi binding to libyaml

• Yaml.Json.Parser

  ---

  YAML 1.1/1.2 and JSON pure Object Pascal parser

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Elixir

• yaml-elixir

  ---

  YAML support for the Elixir language

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Erlang

• yamerl

  ---

  YAML support for the Erlang language

  BSD-2-Clause

• erl-yaml

  ---

  YAML support for Erlang (based on libyaml)

  ISC

Fortran

• yaFyaml 1.2

  ---

  YAML 1.2 implementation in pure Fortran

  Apache-2.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Go

• Go-yaml

  ---

  YAML support for the Go language

  Apache-2.0

• Go-gypsy

  ---

  Simplified YAML parser written in Go

  Apache-2.0

• goccy/go-yaml 1.2

  ---

  YAML 1.2 implementation in pure Go

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Groovy

• YamlSlurper

  ---

  Built-in YAML parser (Groovy 3+)

  Apache-2.0

Haskell

• HsYAML 1.2

  ---

  YAML 1.2 implementation in pure Haskell

  GPL-2.0

• YamlReference 1.2

  ---

  Haskell 1.2 reference parser

• yaml

  ---

  YAML 1.1 Haskell framework (based on libyaml)

  BSD-3-Clause

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Java

• SnakeYAML Engine 1.2

  ---

  Java 8+ / YAML 1.2

  Apache-2.0

• SnakeYAML

  ---

  Java 5 / YAML 1.1

  Apache-2.0

• YamlBeans

  ---

  To/from JavaBeans. YAML 1.0/1.1

  MIT

• eo-yaml 1.2

  ---

  YAML 1.2 for Java 8. Packaged as a Module (Java 9+)

  BSD-3-Clause

• Chronicle-Wire

  ---

  Java Implementation

  Apache-2.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

JavaScript

• yaml 1.2

  ---

  JavaScript parser/stringifier (YAML 1.2, 1.1)

  ISC

• js-yaml 1.2

  ---

  Native PyYAML port to JavaScript

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Julia

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Kotlin

• kaml 1.2

  ---

  YAML 1.2 support for kotlinx.serialization

  Apache-2.0

• yamlkt

  ---

  Multiplatform YAML parser for kotlinx.serialization

  Apache-2.0

• Hoplite

  ---

  Kotlin config library with YAML support

  Apache-2.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Lua

• LuaYAML

  ---

  Lua binding for libyaml

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

MATLAB / Octave

• jsonlab

  ---

  YAML reader/writer for MATLAB and GNU Octave

  BSD-3-Clause

ML

• Yaml-Parser-in-PolyML

  ---

  A YAML parser written for Poly/ML in Standard ML

Nim

• NimYAML 1.2

  ---

  YAML 1.2 implementation in pure Nim

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Objective-C

• YAML.framework

  ---

  YAML support based on libyaml

• YAML4ObjC

  ---

  LibYAML wrapper with YPath query support

  BSD-3-Clause

OCaml

• ocaml-yaml

  ---

  YAML 1.1/1.2 via libyaml bindings

  ISC

• ocaml-syck

  ---

  YAML 1.0 via syck bindings

Perl

• YAML::XS

  ---

  XS binding to libyaml

  Perl

• YAML::PP 1.2

  ---

  A pure Perl YAML 1.2/1.1 processor

  Perl

• YAML::Syck

  ---

  Binding to libsyck

• YAML::Tiny

  ---

  A small YAML subset module

  Perl

• YAML

  ---

  Pure Perl YAML 1.0 Module

  Perl

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

PHP

• The Yaml Component 1.2

  ---

  Symfony Yaml Component (YAML 1.2)

  MIT

• php-yaml

  ---

  libyaml bindings (YAML 1.1)

  MIT

• syck

  ---

  syck bindings (YAML 1.0)

• spyc

  ---

  yaml loader/dumper (YAML 1.?)

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

• PHP YAML Parser 1.2

  ---

  A YAML 1.2 Parser for PHP

  MIT

PowerShell

• powershell-yaml

  ---

  PowerShell CmdLets for YAML manipulation

  Apache-2.0

Python

• PyYAML

  ---

  YAML 1.1, pure Python and libyaml binding

  MIT

• ruamel.yaml 1.2

  ---

  YAML 1.2, update of PyYAML; comments round-trip

  MIT

• strictyaml

  ---

  Restricted YAML subset

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

R

• R YAML

  ---

  libyaml wrapper

  BSD-3-Clause

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Raku

• YAMLish

  ---

  Port of YAMLish to Raku

  Artistic-2.0

• YAML::Parser::LibYAML

  ---

  LibYAML wrapper

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Ruby

• psych

  ---

  libyaml wrapper (in Ruby core for 1.9.2)

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Rust

• yaml-serde

  ---

  YAML framework for the Rust language

  Apache-2.0

• yaml-rust2 1.2

  ---

  YAML 1.2 implementation in pure Rust (actively maintained)

  MIT/Apache-2.0

• saphyr 1.2

  ---

  Modern Rust crates for parsing YAML

• serde-saphyr

  ---

  Panic- and unsafe- free serde support

  Apache-2.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Scala

• circe-yaml

  ---

  YAML parser for circe using SnakeYAML

  Apache-2.0

Scheme

• guile-libyaml

  ---

  YAML module for Guile using libyaml

  LGPL-3.0

Shell

• parse_yaml

  ---

  Simple YAML parser for Bash using sed and awk

  GPL-3.0

• shyaml

  ---

  Read YAML files - jq style

  BSD-2-Clause

Swift

• Yams

  ---

  libyaml wrapper

  MIT

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT

Tcl

• yaml

  ---

  YAML processing with huddle support

TypeScript

• yaml 1.2

  ---

  JavaScript/TypeScript YAML parser (YAML 1.2, 1.1)

  ISC

• js-yaml 1.2

  ---

  YAML parser and serializer

  MIT

• yaml-thom 1.2

  ---

  Experimental YAML 1.2 reference implementation

  MIT

Typst

• yaml

  ---

  YAML support built into Typst scripting language

  Apache-2.0

V

• yaml

  ---

  Strictly parse and format YAML data

  MIT

Vim

• yamlvim

  ---

  YAML dumper/emitter in pure vimscript

Zig

• zig-yaml 1.2

  ---

  YAML 1.2 parser for Zig

  MIT

• ymlz

  ---

  Small and convenient YAML parser for Zig

  Apache-2.0

• YAMLStar 1.2

  ---

  YAML 1.2 loader

  MIT

• YAMLScript 1.2

  ---

  YAMLScript YAML loader

  MIT