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. avro-simple
  11. aws-config
  12. aws-s3 < "4.5.1" | >= "4.8.0"
  13. awsm-codegen
  14. bap-radare2
  15. beluga >= "1.1"
  16. bitcoin >= "3.0"
  17. boulangerie
  18. builder-web >= "0.2.0"
  19. caisar
  20. calculon != "0.5"
  21. calculon-redis-lib
  22. calculon-web = "0.6"
  23. camelot >= "1.3.0"
  24. camels
  25. canary
  26. catala = "0.9.0" | >= "1.0.0~alpha"
  27. cb-check
  28. cbor >= "0.3"
  29. cconv-ppx
  30. chess_com_api
  31. colibrics
  32. comby-semantic
  33. commons
  34. containers >= "3.9"
  35. coq-lsp
  36. coq-of-ocaml
  37. coq-serapi >= "8.10.0+0.7.0" & < "8.20.0+0.20.0"
  38. crs >= "0.0.20250705"
  39. current_docker
  40. current_examples
  41. current_git
  42. current_github
  43. current_gitlab
  44. current_slack
  45. current_ssh
  46. current_web
  47. dap
  48. daypack-lib
  49. dblp-api
  50. decoders-yojson >= "0.7.0"
  51. devkit
  52. docfd >= "2.1.0"
  53. docker-api >= "0.2.2"
  54. docker_hub
  55. dot-merlin-reader < "4.9"
  56. dream
  57. dream-inertia
  58. dune-cargo-build
  59. dune-release >= "1.4.0"
  60. dune_deps_extra
  61. eio_main >= "0.10"
  62. elasticsearch-cli = "0.5"
  63. elpi >= "3.3.1"
  64. fehu
  65. fiat-p256
  66. fit >= "1.2.0"
  67. forester >= "3.1.0"
  68. frama-c < "23.0" | >= "27.0~beta"
  69. fred
  70. frenetic
  71. fstar
  72. gapi-ocaml
  73. gdbprofiler
  74. gemini
  75. gendarme-json < "0.4.0"
  76. gendarme-yojson
  77. github != "4.0.0"
  78. github-data
  79. gitlab
  80. goblint >= "2.0.0"
  81. goblint-cil >= "1.8.0"
  82. gopcaml-mode-merlin < "0.0.6"
  83. gradescope_submit
  84. graphql < "0.9.0" | >= "0.14.0"
  85. graphql-async >= "0.14.0"
  86. graphql-cohttp >= "0.13.0"
  87. graphql-lwt >= "0.14.0"
  88. graphql_ppx
  89. gremlin
  90. guardian
  91. h2
  92. hacl_x25519
  93. handlebars-ml
  94. hilite < "0.3.0"
  95. hl_yaml
  96. hockmd
  97. horned_worm
  98. hpack
  99. hsluv
  100. httph
  101. huml
  102. huml-cli
  103. index-bench
  104. ip2location
  105. ip2locationio
  106. ip2whois
  107. irmin-graphql
  108. irmin-tezos
  109. jasmin
  110. jhupllib
  111. jose
  112. js_of_ocaml-compiler
  113. jsonrpc < "1.6.0" | >= "1.23.1"
  114. jsonschema
  115. jsonschema2atd
  116. jupyter
  117. jupyter-kernel
  118. jwto
  119. kappa-library < "4.1.3"
  120. karamel
  121. kaun >= "1.0.0~alpha1"
  122. kind2
  123. kremlin < "transition"
  124. kubecaml
  125. lablgtk3-extras >= "3.0.1"
  126. lambdapi
  127. learn-ocaml
  128. letsencrypt
  129. letters
  130. libsail
  131. lichess_api
  132. linol >= "0.2"
  133. linol-eio
  134. linol-lwt
  135. lockfree >= "0.3.1"
  136. logs-async-reporter >= "1.3"
  137. lsp
  138. melange-json = "1.2.0"
  139. melange-json-native
  140. merlin != "4.5-411"
  141. metadb
  142. mirage-crypto-ec
  143. mjson
  144. monorobot
  145. mopsa
  146. morbig >= "0.11.0"
  147. multicore-bench
  148. mutaml
  149. nloge
  150. nsq
  151. obuilder
  152. ocaml-lsp-server
  153. ocaml-protoc-plugin >= "6.1.0"
  154. ocaml_db_model
  155. ocaml_pgsql_model
  156. ocamleditor >= "1.15.2-ocaml414"
  157. ocf
  158. ocsigen-start
  159. odoc >= "3.0.0"
  160. odoc-driver
  161. oframl
  162. oidc
  163. ojs-base
  164. ojs_base
  165. ometrics < "0.2.0"
  166. openai-gym
  167. openapi
  168. openapi_router
  169. opencage
  170. openstellina
  171. opium >= "0.19.0"
  172. oraft
  173. orun
  174. osh
  175. ozulip
  176. pa_ppx < "0.19"
  177. pandoc
  178. pbrt_yojson
  179. pds-reachability >= "0.2.3"
  180. petr4
  181. pgn_parser
  182. phylogenetics >= "0.2.0"
  183. piece_rope
  184. pkcs11 >= "1.0.0"
  185. pkcs11-driver >= "1.0.0"
  186. ppx_deriving_jsonschema
  187. ppx_deriving_yojson
  188. ppx_protocol_conv_json < "5.0.0" | >= "5.2.1"
  189. ppx_yojson
  190. ppx_yojson_conv < "v0.13.0"
  191. ppx_yojson_conv_lib
  192. ppxlib-tools >= "0.37.0"
  193. prof_spacetime
  194. qmp >= "0.19.0"
  195. quests
  196. r2pipe
  197. radare2
  198. rdf
  199. records = "0.6.0" | >= "1.0.0"
  200. repr-bench
  201. rfsm >= "2.2"
  202. rocq-devtools
  203. rpclib
  204. rungen
  205. rust-staticlib-gen
  206. SZXX
  207. safemoney
  208. saga
  209. sail < "0.15"
  210. saturn
  211. saturn_lockfree
  212. satyrographos != "0.0.2.7"
  213. savvy
  214. semver2
  215. serde_json
  216. sihl < "0.2.0" | >= "0.3.0~rc2"
  217. sihl-core
  218. slack
  219. slug
  220. smaws-lib
  221. smtml >= "0.7.0"
  222. snf_mcp
  223. spotify-web-api
  224. starred_ml
  225. swagger
  226. talon
  227. tdigest < "2.1.0"
  228. textmate-language >= "0.3.4"
  229. textrazor >= "0.1.1"
  230. tezos-context-hash-irmin
  231. tidy_email_sendgrid
  232. timedesc < "0.8.0"
  233. timedesc-json
  234. timere < "0.4.0"
  235. user-agent-parser
  236. vecosek
  237. vercel
  238. vscoq-language-server < "2.3.3"
  239. vsrocq-language-server
  240. wasm_of_ocaml-compiler
  241. webauthn
  242. why3find
  243. xapi-rrd >= "1.9.0"
  244. yojson-five = "2.2.2"
  245. yosqlite
  246. zanuda
  247. zarr

Conflicts

None