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-2.1.2.tbz
sha256=59f2f1abbfc8a7ccbdbf608894e5c75e8a76006e34899254446f83e200dfb4f9
sha512=309cba7568dec51de20c7ab8df033258c275b8d58b0a36a66b26e673a3bc050cbd7e39ff8fe4796e89263e125bcc21e04dc36a394f3cc201956887eee1fb281a

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: 27 Nov 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"
  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-release >= "1.4.0"
  58. dune_deps_extra
  59. eio_main >= "0.10"
  60. elasticsearch-cli = "0.5"
  61. elpi >= "3.3.1"
  62. fehu
  63. fiat-p256
  64. fit >= "1.2.0"
  65. forester >= "3.1.0"
  66. frama-c < "23.0" | >= "27.0~beta"
  67. fred
  68. frenetic
  69. fstar
  70. gapi-ocaml
  71. gdbprofiler
  72. gemini
  73. gendarme-json
  74. github != "4.0.0"
  75. github-data
  76. gitlab
  77. goblint >= "2.0.0"
  78. goblint-cil >= "1.8.0"
  79. gopcaml-mode-merlin < "0.0.6"
  80. gradescope_submit
  81. graphql < "0.9.0" | >= "0.14.0"
  82. graphql-async >= "0.14.0"
  83. graphql-cohttp >= "0.13.0"
  84. graphql-lwt >= "0.14.0"
  85. graphql_ppx
  86. gremlin
  87. guardian
  88. h2
  89. hacl_x25519
  90. handlebars-ml
  91. hilite < "0.3.0"
  92. hl_yaml
  93. hockmd
  94. horned_worm
  95. hpack
  96. hsluv
  97. httph
  98. huml
  99. huml-cli
  100. index-bench
  101. ip2location
  102. ip2locationio
  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
  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. prof_spacetime
  189. qmp >= "0.19.0"
  190. quests
  191. r2pipe
  192. radare2
  193. rdf
  194. records = "0.6.0" | >= "1.0.0"
  195. repr-bench
  196. rocq-devtools
  197. rpclib
  198. rungen
  199. SZXX
  200. safemoney
  201. saga
  202. sail < "0.15"
  203. saturn
  204. saturn_lockfree
  205. satyrographos != "0.0.2.7"
  206. savvy
  207. semver2
  208. serde_json
  209. sihl < "0.2.0" | >= "0.3.0~rc2"
  210. sihl-core
  211. slack
  212. slug
  213. smaws-lib
  214. smtml >= "0.7.0"
  215. snf_mcp
  216. spotify-web-api
  217. starred_ml
  218. swagger
  219. talon
  220. tdigest < "2.1.0"
  221. textmate-language >= "0.3.4"
  222. textrazor >= "0.1.1"
  223. tezos-context-hash-irmin
  224. tidy_email_sendgrid
  225. timedesc < "0.8.0"
  226. timedesc-json
  227. timere < "0.4.0"
  228. user-agent-parser
  229. vecosek
  230. vercel
  231. vscoq-language-server
  232. vsrocq-language-server
  233. wasm_of_ocaml-compiler
  234. webauthn
  235. why3find
  236. xapi-rrd >= "1.9.0"
  237. yosqlite >= "0.2"
  238. zanuda
  239. zarr

Conflicts

None