Need JSON editing inside a React app? Here's what's worth using in 2026, with bundle sizes and honest tradeoffs.
The libraries
1. @monaco-editor/react
The VS Code editor inside React. Full syntax highlighting, schema validation, TypeScript support.
- Bundle: ~2MB (lazy load it)
- Best for: admin panels, dev tools
import Editor from "@monaco-editor/react";
<Editor height="400px" language="json" value={JSON.stringify(data, null, 2)} />
2. react-json-view
Collapsible tree view for reading and editing JSON. Lightweight and clean.
- Bundle: ~150KB
- Best for: dashboards, data inspection
3. react-json-editor-ajrm
Form-style JSON editor with validation. Good for user-facing config editors.
4. @rjsf/core (React JSON Schema Form)
Generates full forms from JSON Schema. Best when you want form inputs, not raw JSON editing.
- Best for: dynamic form generation
5. json-edit-react
Newer library, simple API, decent tree editor with inline editing.
6. react-ace
Ace editor wrapper. Lighter than Monaco, still full-featured.
7. CodeMirror 6 (via @uiw/react-codemirror)
Highly customizable, modular, excellent performance.
- Best for: custom-built editors
Quick pick guide
| Need | Library |
|---|---|
| Full IDE experience | Monaco |
| Lightweight tree view | react-json-view |
| Form from schema | @rjsf/core |
| Custom editor | CodeMirror 6 |
Full comparison with React 18 examples: 7 Best JSON Editor Libraries for React
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