JSON ↔ JSON5 Converter

Bidirectional & Real-time

Convert standard JSON into human-readable JSON5 and transform JSON5 back into strict RFC 8259 JSON seamlessly.

JSON

{
  "status": "success",
  "statusCode": 200,
  "data": {
    "userId": "usr_948201a",
    "username": "shyam_dev",
    "email": "shyam@example.com",
    "profile": {
      "firstName": "Shyam",
      "lastName": "Bhati",
      "role": "Lead Architect",
      "skills": [
        "Next.js",
        "TypeScript",
        "Tailwind CSS",
        "Microservices"
      ]
    },
    "preferences": {
      "theme": "dark",
      "notifications": true,
      "twoFactorAuth": false
    }
  },
  "timestamp": "2026-10-20T21:10:00Z"
}

Ln 1, Col 1|26 lines|528 chars

Spaces: 2|JSON|UTF-8

JSON5

{
  // Converted to idiomatic JSON5
  status: 'success',
  statusCode: 200,
  data: {
    userId: 'usr_948201a',
    username: 'shyam_dev',
    email: 'shyam@example.com',
    profile: {
      firstName: 'Shyam',
      lastName: 'Bhati',
      role: 'Lead Architect',
      skills: [
        'Next.js',
        'TypeScript',
        'Tailwind CSS',
        'Microservices',
      ],
    },
    preferences: {
      theme: 'dark',
      notifications: true,
      twoFactorAuth: false,
    },
  },
  timestamp: '2026-10-20T21:10:00Z',
}

Ln 1, Col 1|27 lines|535 chars

Spaces: 2|JSON5|UTF-8

JSON to JSON5 & JSON5 to JSON Converter Online

Convert seamlessly between strict standard JSON (RFC 8259) and human-friendly JSON5 with real-time bidirectional synchronization. Whether you are generating config files with comments or converting JSON5 back into strict JSON for production APIs, this converter handles it instantly.

PlayWithJSON parses both formats in your browser without sending any payload to remote servers. Enjoy instant error highlighting, custom indentation, unquoted keys, single quotes, and one-click copying.

{}

Why Use PlayWithJSON?

Bidirectional real-time conversion
Converts strict JSON to readable JSON5
Strips JSON5 syntax for strict RFC 8259 APIs
100% Client-side and offline capable
Instant validation error pinpointing

What Can You Do With Our JSON ↔ JSON5 Converter?

Bidirectional Live Conversion

Edit either pane and watch the opposite pane update automatically in real-time.

Strict JSON Standardization

Convert JSON5 back into strict RFC 8259 compliant JSON with double-quoted keys.

Human-Friendly JSON5

Turn rigid JSON into clean JSON5 with single quotes, unquoted keys, and comments.

Dual-Pane Syntax Checking

Instant linting on both sides highlighting any syntax mistakes with line numbers.

Minify & Beautify

Toggle 2-space or 4-space indentation or compact both formats to minified form.

One-Click Export

Quickly copy or download .json and .json5 files directly into your workspace.

How to Convert JSON ↔ JSON5 Online

Paste into Either Panel

Paste standard JSON into the left panel or JSON5 into the right panel.

Automatic Live Conversion

The converter immediately parses and populates the counterpart format.

Check Syntax & Indentation

Adjust indentation (2 or 4 spaces) or check error highlights if input is invalid.

Copy or Download Output

Copy the result to your clipboard or download the converted file with one click.

JSON ↔ JSON5 Conversion Example

Standard Strict JSON (Input)

{ "project": "PlayWithJSON", "version": 1, "public": true }

Idiomatic JSON5 (Converted)

2 // Auto-converted to JSON5

3 project: 'PlayWithJSON',

4 version: 1,

5 public: true,

Strict JSON vs JSON5 Comparison

Invalid in Strict JSON (Trailing Comma)

2 "name": "PlayWithJSON",

3 "fast": true,

Strict JSON Error: Trailing comma not allowed before closing brace }

Valid in JSON5 (Trailing Comma Allowed)

2 name: 'PlayWithJSON',

3 fast: true,

Supported Conversion Features

Strict RFC 8259 validation

JSON5 ES5 grammar parsing

Unquoted key identifier conversion

Single quote & double quote formatting

Trailing comma removal or insertion

Hexadecimal to decimal conversion

Real-time bidirectional updates

Resizable split view comparison

Copy to clipboard with one click

Download .json and .json5 files

Works on mobile and desktop

100% Private in-browser processing

Frequently Asked Questions

Frequently Asked Questions about JSON ↔ JSON5

Standard JSON (RFC 8259) is very strict: all keys must be enclosed in double quotes, strings must use double quotes, and trailing commas or comments are forbidden. JSON5 expands JSON to match ECMAScript 5.1 syntax, allowing comments, single quotes, unquoted keys, and trailing commas.

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