{"id":48311,"library":"json-to-json-schema","title":"JSON to JSON Schema","description":"Convert a JSON value into a JSON Schema that describes its structure. This library infers types (string, number, boolean, array, object, null) and generates a basic JSON Schema draft-04 compatible output. Version 0.0.4 is the latest release, with no further updates since 2016. It is a lightweight utility suitable for quick schema generation, but lacks support for advanced features like pattern validation, enums, or custom keywords. Alternative libraries like jsonschema or ajv provide more comprehensive schema handling.","status":"abandoned","version":"0.0.4","language":"javascript","source_language":"en","source_url":null,"tags":["javascript","json","schema"],"install":[{"cmd":"npm install json-to-json-schema","lang":"bash","label":"npm"},{"cmd":"yarn add json-to-json-schema","lang":"bash","label":"yarn"},{"cmd":"pnpm add json-to-json-schema","lang":"bash","label":"pnpm"}],"dependencies":[],"imports":[{"note":"The package exports a named export 'convert', not a default. Note the package name in the import is 'json-schema-from-json', which is different from the npm package name 'json-to-json-schema' due to an error in the README.","wrong":"import convert from 'json-schema-from-json';","symbol":"convert","correct":"import { convert } from 'json-schema-from-json';"},{"note":"CommonJS destructuring is required because 'convert' is a named export.","wrong":"const convert = require('json-schema-from-json');","symbol":"convert","correct":"const { convert } = require('json-schema-from-json');"},{"note":"In browser UMD builds, the global object is 'JSONToJSONSchema' and the function is under 'convert' property.","wrong":"const schema = JSONToJSONSchema(json);","symbol":"JSONToJSONSchema","correct":"const schema = JSONToJSONSchema.convert(json);"}],"quickstart":{"code":"import { convert } from 'json-schema-from-json';\n\nconst json = {\n  name: 'Alice',\n  age: 30,\n  active: true,\n  tags: ['admin', 'user'],\n  address: null\n};\n\nconst schema = convert(json);\nconsole.log(JSON.stringify(schema, null, 2));\n// Output:\n// {\n//   \"type\": \"object\",\n//   \"properties\": {\n//     \"name\": { \"type\": \"string\" },\n//     \"age\": { \"type\": \"number\" },\n//     \"active\": { \"type\": \"boolean\" },\n//     \"tags\": { \"type\": \"array\", \"items\": { \"type\": \"string\" } },\n//     \"address\": { \"type\": \"null\" }\n//   },\n//   \"required\": [\"name\", \"age\", \"active\", \"tags\", \"address\"]\n// }","lang":"javascript","description":"Converts a sample JSON object into a JSON Schema showing inferred types and required fields."},"warnings":[{"fix":"Install the package as 'json-to-json-schema' but import using the name 'json-schema-from-json' (as per the README). Alternatively, check actual exports via the installed package.","message":"The import path in the README is incorrect: 'json-schema-from-json' does not match the package name 'json-to-json-schema'. Using the wrong import will result in a module not found error.","severity":"breaking","affected_versions":">=0.0.0"},{"fix":"Consider using an actively maintained alternative like 'jsonschema' or 'generate-schema'.","message":"Package has not been updated since 2016. It uses outdated dependencies (Babel 5) and is not compatible with modern JavaScript tooling.","severity":"deprecated","affected_versions":"0.0.4"},{"fix":"Manually validate generated schemas for complex data structures.","message":"The package does not handle arrays with mixed types or nested objects consistently. All items in an array share the same type, which may not reflect the actual data.","severity":"gotcha","affected_versions":">=0.0.0"}],"env_vars":null,"search_vec":"'-04':34 '0.0.4':38 '2016':48 'advanc':63 'ajv':77 'altern':72 'array':24 'basic':30 'boolean':23 'compat':35 'comprehens':80 'convert':5 'custom':70 'describ':14 'draft':33 'enum':68 'featur':64 'generat':28,58 'handl':82 'infer':19 'javascript':83 'json':1,3,7,11,31,84 'jsonschema':75 'keyword':71 'lack':60 'latest':41 'librari':18,73 'lightweight':52 'like':65,74 'null':26 'number':22 'object':25 'output':36 'pattern':66 'provid':78 'quick':56 'releas':42 'schema':4,12,32,57,81,85 'sinc':47 'string':21 'structur':16 'suitabl':54 'support':61 'type':20 'updat':46 'util':53 'valid':67 'valu':8 'version':37","created_at":"2026-06-07T16:55:59.489712+00:00","updated_at":"2026-06-07T16:55:59.489712+00:00","problems":[{"fix":"Install 'json-to-json-schema' and import using the same name: import { convert } from 'json-to-json-schema';","cause":"Trying to import using the name given in the README, which is different from the installed package name.","error":"Error: Cannot find module 'json-schema-from-json'"},{"fix":"Use named import: import { convert } from 'json-to-json-schema';","cause":"Attempting to import 'convert' as a default export instead of named export.","error":"TypeError: convert is not a function"},{"fix":"Use JSONToJSONSchema.convert(json) instead.","cause":"In browser, using the global 'JSONToJSONSchema' as a function directly, but it is an object with a 'convert' method.","error":"TypeError: JSONToJSONSchema is not a function"}],"ecosystem":"npm","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":null,"github":null,"docs":null,"changelog":null,"pypi":null,"npm":"json-to-json-schema","openapi_spec":null,"status_page":null,"smithery":null,"categories":["devops"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-07","next_check":"2026-09-05","install_tag":null}}