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-2.1.1.tbz
sha256=d58183207b198dc065866239066e074c34f9e139c0d9c4175a38809790e88173
sha512=f7b8529900acb29bc6236d8312d3ebcadbcb3f9d361c8acaed9f7fc7e30527b41a1f3cff80382dde445e6da18a4edc5a9c6758af24affce1022d0741dbd9daeb

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: 11 Oct 2023

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 (4)

  1. seq >= "0.2.2"
  2. cppo build
  3. ocaml >= "4.02.3"
  4. 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" & < "3.0.1"
  9. atdml
  10. avro-compiler
  11. avro-simple
  12. aws-config
  13. aws-s3 < "4.5.1" | >= "4.8.0"
  14. awsm-codegen
  15. bap-radare2
  16. beluga >= "1.1"
  17. bitcoin >= "3.0"
  18. boulangerie
  19. builder-web >= "0.2.0"
  20. caisar
  21. calculon != "0.5"
  22. calculon-redis-lib
  23. calculon-web = "0.6"
  24. camelot >= "1.3.0"
  25. camels
  26. canary
  27. catala = "0.9.0" | >= "1.0.0~beta"
  28. cb-check
  29. cbor >= "0.3"
  30. cconv-ppx
  31. chess_com_api
  32. colibrics
  33. comby-semantic
  34. commons
  35. containers >= "3.9"
  36. coq-lsp
  37. coq-of-ocaml
  38. coq-serapi >= "8.10.0+0.7.0" & < "8.20.0+0.20.0"
  39. crs >= "0.0.20250705" & < "0.0.20260307"
  40. current_docker
  41. current_examples
  42. current_git
  43. current_github
  44. current_gitlab
  45. current_slack
  46. current_ssh
  47. current_web
  48. dap
  49. daypack-lib
  50. dblp-api
  51. decoders-yojson >= "0.7.0"
  52. devkit
  53. dnsrobot
  54. docker-api >= "0.2.2"
  55. docker_hub
  56. dot-merlin-reader < "4.9"
  57. dream
  58. dream-inertia
  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 < "1.0.0~alpha3"
  65. fiat-p256
  66. fit >= "1.2.0"
  67. frama-c < "23.0" | >= "27.0~beta"
  68. fred
  69. frenetic
  70. fstar
  71. gapi-ocaml
  72. gdbprofiler
  73. gemini
  74. gendarme-json < "0.4.0"
  75. gendarme-yojson
  76. github != "4.0.0"
  77. github-data
  78. github-unix < "4.5.1"
  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. irmin-graphql
  107. irmin-tezos
  108. jasmin
  109. jhupllib
  110. jose
  111. js_of_ocaml-compiler
  112. jsonrpc < "1.6.0" | >= "1.23.1"
  113. jsonschema
  114. jsonschema-core
  115. jsonschema2atd
  116. jupyter
  117. jupyter-kernel
  118. jwto
  119. kappa-library
  120. karamel
  121. kaun >= "1.0.0~alpha1" & < "1.0.0~alpha3"
  122. kind2
  123. kremlin < "transition"
  124. kubecaml
  125. lablgtk3-extras >= "3.0.1"
  126. lambdapi
  127. learn-ocaml
  128. letsencrypt < "2.0.0"
  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. nats-client
  150. nats-client-async
  151. neo4j_bolt
  152. nloge
  153. nsq
  154. obuilder
  155. ocaml-lsp-server
  156. ocaml-protoc-plugin >= "6.1.0"
  157. ocaml_db_model
  158. ocaml_pgsql_model
  159. ocamleditor >= "1.15.2-ocaml414"
  160. ocf
  161. ochre
  162. ocsigen-start
  163. odoc >= "3.0.0"
  164. odoc-driver
  165. oframl
  166. oidc
  167. ojs-base
  168. ojs_base
  169. ometrics < "0.2.0"
  170. opam-check-npm-deps >= "4.1.0"
  171. openai-gym
  172. openapi < "1.0.0"
  173. openapi_router
  174. opencage
  175. openstellina
  176. opium >= "0.19.0"
  177. oraft
  178. orun
  179. osh
  180. oui
  181. ozulip
  182. pa_ppx < "0.19"
  183. pandoc
  184. pbrt_yojson
  185. pds-reachability >= "0.2.3"
  186. petr4
  187. pgn_parser
  188. phylogenetics >= "0.2.0"
  189. piece_rope
  190. pkcs11 >= "1.0.0"
  191. pkcs11-driver >= "1.0.0"
  192. polymarket
  193. ppx_deriving_jsonschema
  194. ppx_deriving_yojson
  195. ppx_protocol_conv_json < "5.0.0" | >= "5.2.1"
  196. ppx_yojson
  197. ppx_yojson_conv < "v0.13.0"
  198. ppx_yojson_conv_lib
  199. prof_spacetime
  200. pxshot
  201. qdrant
  202. qmp >= "0.19.0"
  203. quests
  204. r2pipe
  205. radare2
  206. rdf < "1.0.0"
  207. records = "0.6.0" | >= "1.0.0"
  208. repr-bench
  209. rfsm >= "2.2"
  210. rocq-devtools
  211. rpclib
  212. rungen
  213. SZXX
  214. safemoney
  215. saga
  216. sail < "0.15"
  217. saturn
  218. saturn_lockfree
  219. satyrographos != "0.0.2.7"
  220. savvy
  221. semver2
  222. serde_json
  223. shakuhachi
  224. sihl < "0.2.0" | >= "0.3.0~rc2"
  225. sihl-core
  226. simple_httpd
  227. slack
  228. slug
  229. smaws-lib
  230. smtml >= "0.7.0"
  231. snf_mcp
  232. spectrum_palette_ppx
  233. spotify-web-api
  234. swagger
  235. talon < "1.0.0~alpha3"
  236. tdigest < "2.1.0"
  237. testcontainers
  238. textmate-language >= "0.3.4"
  239. textrazor >= "0.1.1"
  240. tidy_email_sendgrid
  241. timedesc < "0.8.0"
  242. timedesc-json
  243. timere < "0.4.0"
  244. user-agent-parser
  245. vecosek
  246. vercel
  247. vscoq-language-server < "2.3.3"
  248. vsrocq-language-server
  249. wasm_of_ocaml-compiler
  250. webauthn
  251. why3find
  252. xapi-rrd >= "1.9.0"
  253. yultracer
  254. zanuda
  255. zarr

Conflicts

None