package yojson

  1. Overview
  2. Docs
Yojson is an optimized parsing and printing library for the JSON format

Install 

dune-project
 Dependency

github.com Readme Changelog BSD-3-Clause License Edit opam file Versions (15)

Authors

  1. M
    Martin Jambon

Maintainers

  1. P
    paul-elliot@tarides.com
  2. N
    nathan@tarides.com
  3. M
    marek@tarides.com

Sources

yojson-2.2.2.tbz
sha256=9abfad8c9a79d4723ad2f6448e669c1e68dbfc87cc54a1b7c064b0c90912c595
sha512=ac52eae3ca1d3129a7885ca638e6ae5bcfc387598a82cc30d3e4988fd154f1756719c399f96e950d898c79a6dbd4ccc44b6f468bcafbd620e6945a0415b41e0c

Description

Yojson is an optimized parsing and printing library for the JSON format.

ydump is a pretty-printing command-line program provided with the yojson package.

Published: 29 Jun 2024

README

Yojson: JSON library for OCaml

Build Status

This library parses JSON data into a nested OCaml tree data structure.

Library documentation

Currently at https://ocaml-community.github.io/yojson/

Examples

A simple example on how to parse JSON from a string literal.

let json_string = {|
  {"number" : 42,
   "string" : "yes",
   "list": ["for", "sure", 42]}|}
(* val json_string : string *)

let json = Yojson.Safe.from_string json_string
(* val json : Yojson.Safe.t *)

let () = Format.printf "Parsed to %a" Yojson.Safe.pp json

Yojson is a pretty common choice for parsing JSON in OCaml, as such it is the base for a number of tools and libraries that are built on top of it.

  • ppx_deriving_yojson to automatically generate code that converts between Yojson.Safe.t and custom OCaml types
  • ppx_yojson_conv, an alternative to ppx_deriving_yojson from Jane Street with different design decisions
  • atd, generates mapping code from .atd specification files and can be used in multiple languages
  • jsonm is an alternate JSON parser that parses JSON into a stream of items, so the complete data structure does not have to be in memory.

Help wanted

Yojson is developed and maintained by volunteers — users like you. Various issues are in need of attention. If you'd like to contribute, please leave a comment on the issue you're interested in, or create a new issue. Experienced contributors will guide you as needed.

There are many simple ways of making a positive impact. For example, you can...

  • Use the software in your project.
  • Give a demo to your colleagues.
  • Share the passion on your blog.
  • Tweet about what you're doing with Yojson.
  • Report difficulties by creating new issues. We'll triage them.
  • Ask questions on StackOverflow.
  • Answer questions on StackOverflow.
  • Discuss usage on the OCaml forums.
  • Pick a task that's easy for you.

Check out in particular good first time issues and other issues with which we could use some help.

License

Yojson is licensed under the 3-clause BSD license, see LICENSE.md for details.

Dependencies (3)

  1. seq >= "0.2.2"
  2. ocaml >= "4.02.3"
  3. dune >= "2.7"

Dev Dependencies (2)

  1. odoc with-doc
  2. alcotest with-test & >= "0.8.5"

  1. 0install >= "2.18"
  2. abella >= "2.0.8"
  3. acgtk
  4. anthropic
  5. archetype
  6. atd >= "2.6.0"
  7. atdgen >= "1.13.0" & < "2.8.0" | >= "2.10.0"
  8. atdgen-runtime >= "2.10.0"
  9. avro-compiler
  10. aws-config
  11. aws-s3 < "4.5.1" | >= "4.8.0"
  12. awsm-codegen
  13. bap-radare2
  14. beluga >= "1.1"
  15. bitcoin >= "3.0"
  16. boulangerie
  17. builder-web >= "0.2.0"
  18. caisar
  19. calculon != "0.5"
  20. calculon-redis-lib
  21. calculon-web = "0.6"
  22. camelot >= "1.3.0"
  23. camels
  24. canary
  25. catala = "0.9.0" | >= "1.0.0~alpha"
  26. cb-check
  27. cbor >= "0.3"
  28. cconv-ppx
  29. chess_com_api
  30. colibrics
  31. comby-semantic
  32. commons
  33. containers >= "3.9"
  34. coq-lsp
  35. coq-of-ocaml
  36. coq-serapi >= "8.10.0+0.7.0" & < "8.20.0+0.20.0"
  37. crs >= "0.0.20250705"
  38. current_docker
  39. current_examples
  40. current_git
  41. current_github
  42. current_gitlab
  43. current_slack
  44. current_ssh
  45. current_web
  46. dap
  47. daypack-lib
  48. dblp-api
  49. decoders-yojson >= "0.7.0"
  50. devkit
  51. docfd >= "2.1.0"
  52. docker-api >= "0.2.2"
  53. docker_hub
  54. dot-merlin-reader < "4.9"
  55. dream
  56. dream-inertia
  57. dune-cargo-build
  58. dune-release >= "1.4.0"
  59. dune_deps_extra
  60. eio_main >= "0.10"
  61. elasticsearch-cli = "0.5"
  62. elpi >= "3.3.1"
  63. fehu
  64. fiat-p256
  65. fit >= "1.2.0"
  66. forester >= "3.1.0"
  67. frama-c < "23.0" | >= "27.0~beta"
  68. fred
  69. frenetic
  70. fstar
  71. gapi-ocaml
  72. gdbprofiler
  73. gemini
  74. gendarme-json
  75. github != "4.0.0"
  76. github-data
  77. gitlab
  78. goblint >= "2.0.0"
  79. goblint-cil >= "1.8.0"
  80. gopcaml-mode-merlin < "0.0.6"
  81. gradescope_submit
  82. graphql < "0.9.0" | >= "0.14.0"
  83. graphql-async >= "0.14.0"
  84. graphql-cohttp >= "0.13.0"
  85. graphql-lwt >= "0.14.0"
  86. graphql_ppx
  87. gremlin
  88. guardian
  89. h2
  90. hacl_x25519
  91. handlebars-ml
  92. hilite < "0.3.0"
  93. hl_yaml
  94. hockmd
  95. horned_worm
  96. hpack
  97. hsluv
  98. httph
  99. index-bench
  100. ip2location
  101. ip2locationio
  102. ip2whois
  103. irmin-graphql
  104. irmin-tezos
  105. jasmin
  106. jhupllib
  107. jose
  108. js_of_ocaml-compiler
  109. jsonrpc < "1.6.0" | >= "1.23.1"
  110. jsonschema
  111. jsonschema2atd
  112. jupyter
  113. jupyter-kernel
  114. jwto
  115. kappa-library < "4.1.3"
  116. karamel
  117. kaun >= "1.0.0~alpha1"
  118. kind2
  119. kremlin < "transition"
  120. kubecaml
  121. lablgtk3-extras >= "3.0.1"
  122. lambdapi
  123. learn-ocaml
  124. letsencrypt
  125. letters
  126. libsail
  127. lichess_api
  128. linol >= "0.2"
  129. linol-eio
  130. linol-lwt
  131. lockfree >= "0.3.1"
  132. logs-async-reporter >= "1.3"
  133. lsp
  134. melange-json = "1.2.0"
  135. melange-json-native
  136. merlin != "4.5-411"
  137. metadb
  138. mirage-crypto-ec
  139. mjson
  140. monorobot
  141. mopsa
  142. morbig >= "0.11.0"
  143. multicore-bench
  144. mutaml
  145. nloge
  146. nsq
  147. obuilder
  148. ocaml-lsp-server
  149. ocaml-protoc-plugin >= "6.1.0"
  150. ocaml_db_model
  151. ocaml_pgsql_model
  152. ocamleditor >= "1.15.2-ocaml414"
  153. ocf
  154. ocsigen-start
  155. odoc >= "3.0.0"
  156. odoc-driver
  157. oframl
  158. oidc
  159. ojs-base
  160. ojs_base
  161. ometrics < "0.2.0"
  162. openai-gym
  163. openapi
  164. openapi_router
  165. opencage
  166. openstellina
  167. opium >= "0.19.0"
  168. oraft
  169. orun
  170. osh
  171. ozulip
  172. pa_ppx < "0.19"
  173. pandoc
  174. pbrt_yojson
  175. pds-reachability >= "0.2.3"
  176. petr4
  177. pgn_parser
  178. phylogenetics >= "0.2.0"
  179. piece_rope
  180. pkcs11 >= "1.0.0"
  181. pkcs11-driver >= "1.0.0"
  182. ppx_deriving_jsonschema
  183. ppx_deriving_yojson
  184. ppx_protocol_conv_json < "5.0.0" | >= "5.2.1"
  185. ppx_yojson
  186. ppx_yojson_conv < "v0.13.0"
  187. ppx_yojson_conv_lib
  188. ppxlib-tools >= "0.37.0"
  189. prof_spacetime
  190. qmp >= "0.19.0"
  191. quests
  192. r2pipe
  193. radare2
  194. rdf
  195. records = "0.6.0" | >= "1.0.0"
  196. repr-bench
  197. rocq-devtools
  198. rpclib
  199. rungen
  200. rust-staticlib-gen
  201. SZXX
  202. safemoney
  203. saga
  204. sail < "0.15"
  205. saturn
  206. saturn_lockfree
  207. satyrographos != "0.0.2.7"
  208. savvy
  209. semver2
  210. serde_json
  211. sihl < "0.2.0" | >= "0.3.0~rc2"
  212. sihl-core
  213. slack
  214. slug
  215. smaws-lib
  216. smtml >= "0.7.0"
  217. snf_mcp
  218. spotify-web-api
  219. starred_ml
  220. swagger
  221. talon
  222. tdigest < "2.1.0"
  223. textmate-language >= "0.3.4"
  224. textrazor >= "0.1.1"
  225. tezos-context-hash-irmin
  226. tidy_email_sendgrid
  227. timedesc < "0.8.0"
  228. timedesc-json
  229. timere < "0.4.0"
  230. user-agent-parser
  231. vecosek
  232. vercel
  233. vscoq-language-server
  234. vsrocq-language-server
  235. wasm_of_ocaml-compiler
  236. webauthn
  237. why3find
  238. xapi-rrd >= "1.9.0"
  239. yojson-five = "2.2.2"
  240. yosqlite
  241. zanuda
  242. zarr

Conflicts

None