coc-json

Neoclide Verified coc-test CI

Json extension for coc.nvim

Installation CommandVim prompt

:CocInstall coc-json

GitHub owner

Neoclide

Version

v1.9.8

npm package

coc-json

Requirements

coc >= 0.0.80

License

MIT

Repository

GitHub

npm latest published 2026-08-24Registry checked 2026-08-24Registry summary

Published Package Summary

coc-json

Json language server extension for coc.nvim.

The server code is extracted from VSCode, which uses vscode-json-languageservice

For highlight of jsonc filetype, you may need jsonc.vim

Install

In your vim/neovim, run the following command:

:CocInstall coc-json

Features

Same as VSCode.

All features of vscode-json-languageservice are supported.

doCompletion for JSON properties and values based on the document's JSON schema.
doHover for values based on descriptions in the document's JSON schema.
Document Symbols for quick navigation to properties in the document.
Document Colors for showing color decorators on values representing colors.
Code Formatting supporting ranges and formatting the whole document.
Diagnostics (Validation) are pushed for all open documents
- syntax errors
- structural validation based on the document's JSON schema.

FAQ

How to suppress error `[json 521] [e] Comments are not permitted in JSON`?

You can configure your vim to make that file with jsonc filetype to allow comment.

How to add custom schema definitions/properties?

You have two choices:

use $schema in your json.
create json schema file and then configure json.schemas in your coc-settings.json, check out https://github.com/neoclide/coc-json/blob/06ea3ace3d0c0a8deaa70942d63345718f029612/package.json#L84

Quotes are hidden?

This is not caused by coc-json, you may checkout the conceallevel option.

License

MIT

Read the complete README

Json extension for coc.nvim

Activation Events

onLanguage:json
onLanguage:jsonc
onCommand:json.clearCache

Developer Resources

Want to build, test, or contribute to coc.nvim extensions? Explore our official SDK and testing toolkits.

Open Developer Guide

This published npm package does not include a history.md or changelog.md file. Browse its npm versions or repository releases for available release information.

All contributes.commands entries from the published package manifest for coc-json@1.9.8.

Command (:CocCommand)	Description
json.sort	Soct JSON document
json.clearCache	Clear schema cache
json.retryResolveSchema	Retry schema resolve
json.selectSchema	Select JSON schema
json.showSchemaList	Show associated schemas
json.copy	Copy JSON path
json.validate	Validate JSON content against a schema
json.configureTrustedDomains	Configure trusted schema domains

All contributes.configuration entries from the published package manifest, including each raw property schema for coc-settings.json.

json.enableboolean

Enable json language server

Default: true

Raw JSON Schema

{
  "type": "boolean",
  "default": true,
  "description": "Enable json language server"
}

json.schemasarray

Schemas associations for json files

Default: []

Raw JSON Schema

{
  "type": "array",
  "items": {
    "type": "object",
    "default": {
      "url": "schemaURL",
      "fileMatch": [
        "/my-file"
      ]
    },
    "properties": {
      "url": {
        "type": "string",
        "default": "/user.schema.json",
        "markdownDescription": "Schema URL or path."
      },
      "schema": {
        "$ref": "http://json-schema.org/draft-04/schema#",
        "description": "Url of json schema, support file/url protocol."
      },
      "fileMatch": {
        "type": "array",
        "items": {
          "type": "string",
          "default": "MyFile.json",
          "markdownDescription": "File pattern to match."
        },
        "minItems": 1,
        "markdownDescription": "File patterns to match."
      }
    }
  },
  "scope": "resource",
  "default": [],
  "description": "Schemas associations for json files"
}

json.execArgvarray

Default: []

Raw JSON Schema

{
  "type": "array",
  "items": {
    "type": "string"
  },
  "default": []
}

json.trace.serverstring

Default: "off"

Raw JSON Schema

{
  "enum": [
    "off",
    "messages",
    "verbose"
  ],
  "type": "string",
  "default": "off"
}

json.format.enableboolean

Enable format for json server

Default: true

Raw JSON Schema

{
  "type": "boolean",
  "scope": "window",
  "default": true,
  "description": "Enable format for json server"
}

json.validate.enableboolean

Enable/disable JSON validation.

Default: true

Raw JSON Schema

{
  "type": "boolean",
  "scope": "window",
  "default": true,
  "description": "Enable/disable JSON validation."
}

json.format.keepLinesboolean

Keep all existing new lines when formatting.

Default: false

Raw JSON Schema

{
  "type": "boolean",
  "scope": "window",
  "default": false,
  "description": "Keep all existing new lines when formatting."
}

json.maxItemsComputednumber

The maximum number of outline symbols and folding regions computed (limited for performance reasons).

Default: 5000

Raw JSON Schema

{
  "type": "number",
  "default": 5000,
  "description": "The maximum number of outline symbols and folding regions computed (limited for performance reasons)."
}

json.validate.commentsstring

Severity of problems when comments are not permitted in JSON.

Raw JSON Schema

{
  "enum": [
    "error",
    "warning",
    "ignore"
  ],
  "type": "string",
  "scope": "window",
  "description": "Severity of problems when comments are not permitted in JSON."
}

json.enableDefaultSchemasboolean

Enable builtin schemas from https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/api/json/catalog.json

Default: true

Raw JSON Schema

{
  "type": "boolean",
  "default": true,
  "description": "Enable builtin schemas from https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/api/json/catalog.json"
}

json.schemaDownload.enableboolean

When enabled, JSON schemas can be fetched from http and https locations.

Default: true

Raw JSON Schema

{
  "tags": [
    "usesOnlineServices"
  ],
  "type": "boolean",
  "default": true,
  "description": "When enabled, JSON schemas can be fetched from http and https locations."
}

json.validate.schemaRequeststring

Severity of problems when a schema cannot be resolved.

Raw JSON Schema

{
  "enum": [
    "error",
    "warning",
    "ignore"
  ],
  "type": "string",
  "scope": "window",
  "description": "Severity of problems when a schema cannot be resolved."
}

json.validate.trailingCommasstring

Severity of trailing comma problems.

Raw JSON Schema

{
  "enum": [
    "error",
    "warning",
    "ignore"
  ],
  "type": "string",
  "scope": "window",
  "description": "Severity of trailing comma problems."
}

json.validate.schemaValidationstring

Severity of problems from schema validation.

Raw JSON Schema

{
  "enum": [
    "error",
    "warning",
    "ignore"
  ],
  "type": "string",
  "scope": "window",
  "description": "Severity of problems from schema validation."
}

json.schemaDownload.trustedDomainsobject

Trusted domains for downloading JSON schemas. Keys can be full domains, full URIs or wildcard patterns (`https://*.example.com`, `*`), values indicate trusted (`true`) or blocked (`false`).

Default: {}

Raw JSON Schema

{
  "tags": [
    "usesOnlineServices"
  ],
  "type": "object",
  "default": {},
  "markdownDescription": "Trusted domains for downloading JSON schemas. Keys can be full domains, full URIs or wildcard patterns (`https://*.example.com`, `*`), values indicate trusted (`true`) or blocked (`false`).",
  "additionalProperties": {
    "type": "boolean"
  }
}

coc-json

Published Package Summary

coc-json

Install

Features

FAQ

How to suppress error [json 521] [e] Comments are not permitted in JSON?

How to add custom schema definitions/properties?

Quotes are hidden?

License

Version History

Contributed Commands

Configuration Schema

How to suppress error `[json 521] [e] Comments are not permitted in JSON`?