7 Best JSON Editor Libraries for React in 2026 (Components Compared)

These libraries solve three scenarios: (1) display-only JSON viewer for showing API responses or config data, (2) editable JSON with syntax highlighting for developer tools, (3) form UI generated from JSON Schema for non-technical users. Which scenario you're in determines which library to use.

1. @uiw/react-json-view

@uiw/react-json-view is a modern JSON viewer component with optional editing. Actively maintained, works with React 18+.

Install:

npm install @uiw/react-json-view

Basic usage:

import JsonView from '@uiw/react-json-view';
import { darkTheme } from '@uiw/react-json-view/dark';

function App() {
  const data = { user: 'Alice', roles: ['admin', 'editor'] };
  
  return <JsonView value={data} style={darkTheme} collapsed={2} />;
}

Bundle size: ~20KB gzipped

Best for: Admin dashboards and internal tools where you need to display JSON with collapsible tree view. Works for both read-only display and basic inline editing.

Not great for: Code editor experience where users type raw JSON. This is a tree view, not a text editor.

2. react-json-view

react-json-view was the original popular JSON viewer for React. No longer actively maintained (last release 2022), but still widely used.

Install:

npm install react-json-view

Basic usage:

import ReactJson from 'react-json-view';

function JsonViewer({ data }) {
  return (
    <ReactJson 
      src={data} 
      theme="monokai" 
      collapsed={1} 
      enableClipboard={true} 
    />
  );
}

Bundle size: ~30KB gzipped

Best for: Maintaining existing codebases that already use it. Works with React 17 and mostly works with React 18.

Not great for: New projects. Use @uiw/react-json-view instead for active maintenance and better React 18 support.

3. Monaco Editor for React

@monaco-editor/react gives you the full VS Code editing experience. Syntax highlighting, IntelliSense, error detection, JSON Schema validation, keyboard shortcuts.

Install:

npm install @monaco-editor/react

Basic usage:

import Editor from '@monaco-editor/react';

function JsonCodeEditor() {
  const [value, setValue] = useState('{"hello": "world"}');

  return (
    <Editor
      height="400px"
      language="json"
      theme="vs-dark"
      value={value}
      onChange={(newValue) => setValue(newValue || '')}
      options={{ minimap: { enabled: false } }}
    />
  );
}

Bundle size: 2-3MB (loads from CDN by default, not in your bundle but users still download it)

Best for: Developer-facing tools where users expect a code editor. API testing interfaces, configuration editors for technical users, internal dev tools.

Not great for: Consumer-facing apps where bundle size matters. The 2-3MB download is too heavy for most public-facing products.

4. react-jsonschema-form

react-jsonschema-form (RJSF) generates form UI from JSON Schema. Users interact with a form, you receive validated JSON.

Install:

npm install @rjsf/core @rjsf/utils @rjsf/validator-ajv8 @rjsf/mui

Basic usage:

import Form from '@rjsf/mui';
import validator from '@rjsf/validator-ajv8';

const schema = {
  type: 'object',
  required: ['name', 'email'],
  properties: {
    name: { type: 'string', title: 'Full Name' },
    email: { type: 'string', title: 'Email', format: 'email' },
    age: { type: 'integer', title: 'Age', minimum: 0 }
  }
};

function ConfigForm() {
  const [formData, setFormData] = useState({});

  return (
    <Form
      schema={schema}
      validator={validator}
      formData={formData}
      onChange={(e) => setFormData(e.formData)}
      onSubmit={(e) => console.log('Submitted:', e.formData)}
    />
  );
}

Bundle size: ~150KB gzipped (plus UI framework like Material UI)

Best for: Non-technical users who need to produce valid JSON through forms. Settings pages, configuration wizards, CMS content editors.

Not great for: Users who need to see or edit raw JSON. This hides JSON completely behind a form interface.

5. react-json-editor-ajrm

react-json-editor-ajrm is a code editor specifically designed for JSON. Lighter than Monaco, heavier than a tree view.

Install:

npm install react-json-editor-ajrm

Basic usage:

import JSONInput from 'react-json-editor-ajrm';
import locale from 'react-json-editor-ajrm/locale/en';

function JsonEditor() {
  const [data, setData] = useState({ name: 'Sample', count: 42 });

  return (
    <JSONInput
      id="json-editor"
      placeholder={data}
      locale={locale}
      height="400px"
      onChange={(content) => {
        if (!content.error) {
          setData(content.jsObject);
        }
      }}
    />
  );
}

Bundle size: ~50KB gzipped

Best for: Code editor experience without Monaco's weight. Users comfortable typing JSON but don't need VS Code-level features.

Not great for: Tree view navigation. This is a text editor, not a collapsible tree. Also not great for advanced features like IntelliSense or multi-cursor editing.

6. JSON Forms

JSON Forms generates forms from JSON Schema with a renderer-based architecture. More customizable than RJSF.

Install:

npm install @jsonforms/core @jsonforms/react @jsonforms/material-renderers

Basic usage:

import { JsonForms } from '@jsonforms/react';
import { materialRenderers, materialCells } from '@jsonforms/material-renderers';

const schema = {
  type: 'object',
  properties: {
    name: { type: 'string' },
    email: { type: 'string', format: 'email' }
  }
};

function ConfigEditor() {
  const [data, setData] = useState({});

  return (
    <JsonForms
      schema={schema}
      data={data}
      renderers={materialRenderers}
      cells={materialCells}
      onChange={({ data }) => setData(data)}
    />
  );
}

Bundle size: ~100KB gzipped (plus UI framework)

Best for: Maximum control over form rendering. Custom renderers let you replace any default behavior while keeping JSON Schema validation.

Not great for: Simple forms where RJSF is easier. JSON Forms has more setup and a steeper learning curve.

7. react-ace

react-ace wraps the Ace editor. Lighter than Monaco, better browser compatibility.

Install:

npm install react-ace ace-builds

Basic usage:

import AceEditor from 'react-ace';
import 'ace-builds/src-noconflict/mode-json';
import 'ace-builds/src-noconflict/theme-monokai';

function JsonAceEditor() {
  const [value, setValue] = useState('{"test": "data"}');

  return (
    <AceEditor
      mode="json"
      theme="monokai"
      value={value}
      onChange={setValue}
      width="100%"
      height="400px"
      setOptions={{ useWorker: true }}
    />
  );
}

Bundle size: ~500KB gzipped

Best for: Code editor experience lighter than Monaco. Good for legacy browser support where Monaco might have issues.

Not great for: Advanced features like IntelliSense or schema-based autocomplete. Ace doesn't provide those.

Library Comparison

Recommendation

For a basic viewer in an admin dashboard: @uiw/react-json-view. For a developer tool where users will edit JSON: Monaco. For generating forms from a schema: react-jsonschema-form. Don't reach for Monaco if users just need to view data. The bundle cost isn't worth it.

Frequently Asked Questions

What's the lightest React component for displaying JSON?

@uiw/react-json-view at ~20KB gzipped. It renders JSON as a collapsible tree with syntax highlighting and optional inline editing. For read-only display without any editing, this is the best choice. Install with npm install @uiw/react-json-view. The API is simple: pass your data object to the value prop and it renders immediately.

How do I add a JSON editor to a React admin panel?

Use @uiw/react-json-view for tree view display or Monaco Editor if users need to type raw JSON. For admin panels, @uiw/react-json-view is usually the right pick because it's lightweight and handles both viewing and basic editing. Install with npm install @uiw/react-json-view, pass your data to the value prop, and add editable prop to enable editing.

Can I use Monaco Editor in a Next.js project?

Yes, but you need to disable SSR for Monaco. Use Next.js dynamic imports with ssr: false: const Editor = dynamic(() => import('@monaco-editor/react'), { ssr: false }). Monaco doesn't work with server-side rendering because it relies on browser APIs. The dynamic import ensures Monaco only loads on the client side. This pattern works for any React library that requires browser APIs.

How do I validate JSON input in a React form?

For schema-based validation, use react-jsonschema-form or JSON Forms. Both generate forms from JSON Schema and validate automatically. For manual validation with any editor, use the ajv library: npm install ajv. Create a validator from your schema, then call validate(data) in your onChange handler. Monaco Editor has built-in schema validation if you configure it with monaco.languages.json.jsonDefaults.setDiagnosticsOptions().

What's the difference between react-json-view and Monaco for React?

react-json-view shows JSON as a collapsible tree view (~30KB). Monaco is a full code editor with syntax highlighting, IntelliSense, and schema validation (2-3MB). Use react-json-view for displaying data to users. Use Monaco for developer tools where users type and edit raw JSON. Monaco is 100x heavier but provides a VS Code experience. Don't use Monaco just for display.