6 Best JSON Editor Libraries for Angular in 2026 (Components & Tools)

Building an Angular application that needs to display, edit, or visualize JSON data? You're not alone. Admin panels, configuration tools, API testing interfaces, and developer dashboards all commonly need a way for users to interact with JSON directly in the browser.

The challenge is finding a JSON editor component that works well with Angular's ecosystem. Some popular JavaScript JSON editors don't have proper Angular wrappers. Others haven't been updated for recent Angular versions. And a few are so heavy that they bloat your bundle size unnecessarily.

I've integrated JSON editors into Angular projects multiple times, and the options have matured significantly over the past few years. This guide covers six libraries worth considering in 2026, from lightweight viewers to full-featured editors with schema validation. Each one works with Angular 15+ and has been actively maintained.

What to Look For in an Angular JSON Editor

Before diving into specific libraries, here's what separates a good JSON editor component from a frustrating one:

Angular-native integration matters more than you might think. Libraries built specifically for Angular (or with proper Angular wrappers) work with change detection, support reactive forms, and follow Angular conventions. Generic JavaScript libraries wrapped hastily often fight against Angular's patterns.

TypeScript support should be complete. You want proper type definitions, not just an any type exported from a package. Good TypeScript support means better autocomplete in your IDE and fewer runtime surprises.

Two-way binding is essential for most use cases. You want to bind a JSON object to the editor and have changes reflected in your component's state automatically. Libraries that only support one-way binding or require manual event handling create unnecessary complexity.

Bundle size adds up quickly in Angular applications. Monaco Editor, for example, is incredibly powerful but adds several megabytes to your bundle. For a simple JSON viewer, that's overkill. Match the library weight to your actual needs.

Validation support becomes important when users are editing configuration files or API payloads. Schema-based validation (using JSON Schema) catches errors before they're submitted.

1. ngx-json-editor (Best for Most Projects)

ngx-json-editor is an Angular wrapper around the popular JSON Editor JavaScript library. It's the most balanced option for typical Angular projects: good features, reasonable bundle size, and straightforward integration.

The component supports three viewing modes out of the box:

• Tree mode: Expandable/collapsible tree with inline editing, perfect for navigating nested structures
• Code mode: Syntax-highlighted text editor for raw JSON editing
• Text mode: Plain text editing without syntax highlighting

Switching between modes is handled by the component's toolbar, giving users flexibility in how they want to work with the data.

Installation and Basic Usage

Bash
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npm install @maaxgr/ang-jsoneditor

Add the module to your Angular module or standalone component:

TypeScript
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import { NgJsonEditorModule } from '@maaxgr/ang-jsoneditor';

@NgModule({
  imports: [NgJsonEditorModule]
})
export class AppModule { }

Use it in your template:

HTML
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<json-editor
  [options]="editorOptions"
  [(data)]="jsonData"
  (change)="onJsonChange($event)">
</json-editor>

And in your component:

TypeScript
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import { JsonEditorOptions } from '@maaxgr/ang-jsoneditor';

export class MyComponent {
  jsonData = {
    name: 'John Doe',
    email: 'john@example.com',
    settings: {
      notifications: true,
      theme: 'dark'
    }
  };

  editorOptions = new JsonEditorOptions();

  constructor() {
    this.editorOptions.modes = ['tree', 'code'];
    this.editorOptions.mode = 'tree';
  }

  onJsonChange(event: any) {
    console.log('JSON changed:', event);
  }
}

When to Use ngx-json-editor

This is the library I'd recommend starting with for most Angular JSON editor needs. It strikes the right balance between features and complexity. The tree view is intuitive for non-developers editing config files, while code mode gives power users the raw editing experience they expect.

The main limitation is bundle size. The underlying JSON Editor library adds about 200KB (minified) to your bundle. That's acceptable for most applications but might be excessive if you only need a simple read-only JSON viewer.

npm: @maaxgr/ang-jsoneditor - Free, MIT License

2. Monaco Editor for Angular (Best for Developer Tools)

Monaco Editor is the editor that powers VS Code. If you want the same editing experience in your Angular application, complete with IntelliSense, error highlighting, and schema-based autocomplete, Monaco is the way to get it.

For Angular integration, ngx-monaco-editor-v2 provides a well-maintained wrapper that handles the complexity of loading Monaco's web workers and integrating with Angular's change detection.

Installation

Bash
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npm install ngx-monaco-editor-v2 monaco-editor

Add the Monaco assets to your angular.json:

JSON
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{
  "assets": [
    {
      "glob": "**/*",
      "input": "node_modules/monaco-editor",
      "output": "assets/monaco-editor"
    }
  ]
}

Basic Usage

TypeScript
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import { MonacoEditorModule, NGX_MONACO_EDITOR_CONFIG } from 'ngx-monaco-editor-v2';

@NgModule({
  imports: [
    MonacoEditorModule.forRoot()
  ]
})
export class AppModule { }

HTML
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<ngx-monaco-editor
  [options]="editorOptions"
  [(ngModel)]="jsonContent">
</ngx-monaco-editor>

TypeScript
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export class MyComponent {
  jsonContent = JSON.stringify({ key: 'value' }, null, 2);

  editorOptions = {
    theme: 'vs-dark',
    language: 'json',
    minimap: { enabled: false },
    automaticLayout: true
  };
}

JSON Schema Validation in Monaco

Monaco's real power for JSON editing comes from schema validation. You can register a JSON Schema and Monaco will validate the editor contents in real time, providing autocomplete suggestions based on the schema:

TypeScript
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import * as monaco from 'monaco-editor';

// Configure JSON schema
monaco.languages.json.jsonDefaults.setDiagnosticsOptions({
  validate: true,
  schemas: [{
    uri: 'https://example.com/config-schema.json',
    fileMatch: ['*'],
    schema: {
      type: 'object',
      properties: {
        name: { type: 'string' },
        count: { type: 'number', minimum: 0 }
      },
      required: ['name']
    }
  }]
});

When to Use Monaco

Monaco is the right choice when you're building developer-facing tools. API testing interfaces, configuration management systems, admin panels for technical users: these are all good fits. Users familiar with VS Code will feel right at home.

The tradeoff is size. Monaco adds 2-3 MB to your bundle even with tree shaking. For a user-facing application where most users won't interact with JSON directly, that's hard to justify. But for internal tools and developer dashboards, the power is worth the weight.

npm: ngx-monaco-editor-v2 - Free, MIT License

3. JSON Forms (Best for Schema-Driven UIs)

JSON Forms takes a fundamentally different approach than the other libraries on this list. Instead of presenting raw JSON for editing, it generates a complete form UI from a JSON Schema.

Define your data structure and validation rules in a schema, and JSON Forms renders appropriate input controls automatically: text fields for strings, number inputs for numbers, checkboxes for booleans, dropdowns for enums, and nested objects rendered as fieldsets or tabs.

This is incredibly powerful for configuration interfaces where users shouldn't need to understand JSON syntax. They see a form, fill it out, and you get validated JSON output.

Installation

Bash
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npm install @jsonforms/core @jsonforms/angular @jsonforms/angular-material

Basic Usage

TypeScript
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import { JsonFormsModule } from '@jsonforms/angular';
import { JsonFormsAngularMaterialModule } from '@jsonforms/angular-material';

@NgModule({
  imports: [
    JsonFormsModule,
    JsonFormsAngularMaterialModule
  ]
})
export class AppModule { }

HTML
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<jsonforms
  [data]="data"
  [schema]="schema"
  [uischema]="uischema"
  (dataChange)="onDataChange($event)">
</jsonforms>

TypeScript
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export class MyComponent {
  data = {
    name: '',
    email: '',
    age: null
  };

  schema = {
    type: 'object',
    properties: {
      name: { type: 'string', minLength: 1 },
      email: { type: 'string', format: 'email' },
      age: { type: 'integer', minimum: 0, maximum: 150 }
    },
    required: ['name', 'email']
  };

  uischema = {
    type: 'VerticalLayout',
    elements: [
      { type: 'Control', scope: '#/properties/name' },
      { type: 'Control', scope: '#/properties/email' },
      { type: 'Control', scope: '#/properties/age' }
    ]
  };

  onDataChange(event: any) {
    this.data = event;
  }
}

When to Use JSON Forms

JSON Forms shines when your users are non-technical and need to produce valid JSON without understanding the format. Settings panels, survey builders, workflow configuration tools: these benefit from the form-based approach.

The learning curve is steeper than other options because you need to understand JSON Schema and JSON Forms' UI Schema concept. But once set up, you get validation, proper input types, error messages, and accessibility for free.

JSON Forms works with Angular Material and Bootstrap out of the box. Custom renderers are possible if you need a different look.

Website: jsonforms.io - Free, MIT License

4. ngx-json-viewer (Best Lightweight Read-Only Option)

ngx-json-viewer is a minimal component for displaying JSON data in an expandable tree view. No editing, no schema validation, just clean visualization.

If all you need is to show users a JSON response from an API, this is the lightest option available. The entire library is under 10KB minified.

Installation and Usage

Bash
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npm install ngx-json-viewer

TypeScript
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import { NgxJsonViewerModule } from 'ngx-json-viewer';

@NgModule({
  imports: [NgxJsonViewerModule]
})
export class AppModule { }

HTML
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<ngx-json-viewer [json]="apiResponse" [expanded]="true"></ngx-json-viewer>

That's the entire integration. The component handles rendering, expand/collapse behavior, and type-based styling (strings, numbers, booleans, null all display differently).

When to Use ngx-json-viewer

Use this when editing isn't required and you want the smallest possible footprint. API response displays in documentation, debug panels showing request/response payloads, log viewers: these are all good use cases.

For anything involving user edits, use one of the other libraries. ngx-json-viewer is purely for display.

npm: ngx-json-viewer - Free, MIT License

5. Ace Editor for Angular (Best Legacy-Compatible Option)

Ace Editor is one of the oldest and most battle-tested code editors for the web. It's been around since 2010 and powers the editors in Cloud9, AWS Console, Wikipedia, and many other production systems.

For Angular, ngx-ace-wrapper provides a straightforward wrapper. Ace is lighter than Monaco (about 500KB vs 2-3 MB) while still offering syntax highlighting, code folding, search/replace, and customizable themes.

Installation

Bash
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npm install ace-builds ngx-ace-wrapper

Basic Usage

TypeScript
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import { AceModule } from 'ngx-ace-wrapper';

@NgModule({
  imports: [AceModule]
})
export class AppModule { }

HTML
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<ace
  mode="json"
  theme="monokai"
  [(value)]="jsonContent"
  [options]="aceOptions">
</ace>

TypeScript
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export class MyComponent {
  jsonContent = JSON.stringify({ hello: 'world' }, null, 2);

  aceOptions = {
    fontSize: 14,
    showPrintMargin: false,
    tabSize: 2
  };
}

When to Use Ace

Ace is a solid choice when you need a code editor experience but can't justify Monaco's bundle size. It's also well-suited for applications that need to support older browsers, as Ace has excellent legacy compatibility.

The main limitation compared to Monaco is IntelliSense. Ace provides syntax highlighting and basic validation, but it doesn't have the same level of schema-aware autocomplete that Monaco offers. For many applications, that's an acceptable tradeoff for the smaller bundle.

npm: ngx-ace-wrapper - Free, BSD License

6. Vanilla JSON Editor with Angular (Best for Full Control)

Vanilla JSON Editor is the successor to JSON Editor (the library that ngx-json-editor wraps). It's been rewritten from scratch with modern JavaScript, better TypeScript support, and a smaller bundle.

While it doesn't have an official Angular wrapper, integrating it is straightforward because it's designed to be framework-agnostic. This gives you full control over the integration while benefiting from a maintained, modern library.

Installation and Integration

Bash
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npm install vanilla-jsoneditor

Create a wrapper component:

TypeScript
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import { Component, ElementRef, Input, OnChanges, OnDestroy, OnInit, ViewChild } from '@angular/core';
import { JSONEditor, Mode, Content, TextContent, JSONContent } from 'vanilla-jsoneditor';

@Component({
  selector: 'app-json-editor',
  template: '<div #editorContainer></div>',
  styles: [':host { display: block; height: 400px; }']
})
export class JsonEditorComponent implements OnInit, OnDestroy, OnChanges {
  @ViewChild('editorContainer', { static: true }) container!: ElementRef;
  @Input() content: Content = { json: {} };
  @Input() mode: Mode = 'tree';

  private editor!: JSONEditor;

  ngOnInit() {
    this.editor = new JSONEditor({
      target: this.container.nativeElement,
      props: {
        content: this.content,
        mode: this.mode,
        onChange: (updatedContent) => {
          // Handle changes
        }
      }
    });
  }

  ngOnChanges() {
    if (this.editor) {
      this.editor.set(this.content);
    }
  }

  ngOnDestroy() {
    if (this.editor) {
      this.editor.destroy();
    }
  }
}

When to Use Vanilla JSON Editor

Choose this when you want the latest features and improvements that haven't yet made it into the ngx-json-editor wrapper. The vanilla version is actively developed with regular releases, while Angular wrappers sometimes lag behind.

The manual integration gives you more control but requires more code. It's worth the effort for projects where JSON editing is a core feature and you want the best available implementation.

npm: vanilla-jsoneditor - Free, ISC License

Library Comparison Table

Tips for JSON Editor Integration in Angular

A few things I've learned from integrating these libraries in production Angular applications:

Lazy load the editor component. JSON editors are often not needed on initial page load. Put the editor behind a route or dynamic import to keep your initial bundle smaller:

TypeScript
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const routes: Routes = [
  {
    path: 'editor',
    loadComponent: () => import('./json-editor/json-editor.component')
      .then(m => m.JsonEditorComponent)
  }
];

Handle large JSON carefully. All of these editors can slow down with very large JSON files (10MB+). If users might load large files, implement pagination, virtualization, or offer a warning before attempting to render.

Validate on the server too. Client-side schema validation improves UX, but always validate JSON on the server before processing. Client-side validation can be bypassed.

Match the editor to your users. Developers are comfortable with raw code editors. Non-technical users need tree views or form-based interfaces. Pick the library that matches who will actually use your feature.

Consider dark mode. Most JSON editor libraries support theming. If your Angular app has dark mode, make sure your editor component respects the theme preference.

Frequently Asked Questions

Which Angular JSON editor has the smallest bundle size?

ngx-json-viewer at around 10KB, but it's read-only. For editing, Vanilla JSON Editor at ~150KB is the smallest full-featured option.

Can I use these with Angular standalone components?

Yes. The libraries that export Angular modules can be imported directly into standalone component imports arrays. Monaco Editor and JSON Forms both work well in standalone setups.

How do I validate JSON against a schema in Angular?

Monaco Editor has built-in JSON Schema support. JSON Forms is entirely schema-driven. For ngx-json-editor, you can use the ajv library alongside it for validation.

What's the most VS Code-like option?

Monaco Editor, since it's literally the same editor that powers VS Code. You get IntelliSense, bracket matching, error squiggles, and all the behaviors VS Code users expect.

Do these libraries support Angular's reactive forms?

ngx-json-editor and Monaco Editor (via ngx-monaco-editor-v2) both support ngModel and can be wrapped for reactive forms. JSON Forms has its own form handling that produces validated JSON output.

Which Library Should You Choose?

For most Angular projects, start with ngx-json-editor. It's well-maintained, reasonably sized, and provides both tree and code editing modes.

For developer tools and admin panels, choose Monaco Editor if you can afford the bundle size. The VS Code experience is unmatched.

For non-technical users editing configuration, use JSON Forms to generate proper form UIs from your schemas.

For read-only JSON display, use ngx-json-viewer to keep your bundle minimal.

For legacy browser support or when Monaco is too heavy, Ace Editor provides a solid middle ground.

For cutting-edge features and maximum control, integrate Vanilla JSON Editor directly.

Related Reading

Working with JSON outside Angular? Check out our editor guides for other environments:

Best JSON Editor Extensions for VS Code covers the top extensions for working with JSON in Visual Studio Code

Best JSON Editors for Windows reviews 9 free desktop tools

Best JSON Editors for Mac features macOS-native options

Best JSON Editors for Linux covers terminal and GUI tools for Linux developers

If you need to merge multiple JSON files before displaying them, our JSON merger tool handles that directly in the browser.

How JSON Works explains the format fundamentals for developers new to JSON

JSON vs XML vs YAML compares data formats if you're deciding which to use in your Angular app