What is a JSON formatter?

A JSON formatter is a tool that takes raw JSON data and formats it with proper indentation and line breaks, making it easier to read and understand. Our JSON formatter automatically adds 2-space indentation, organizes nested objects and arrays, and highlights syntax for better visibility.

How do I format JSON online?

To format JSON online: 1) Paste your JSON into the editor, 2) Click the "Format" button, 3) Your JSON will be instantly formatted with proper indentation. You can also use Ctrl+V to paste and the formatter will automatically beautify valid JSON.

Is this JSON formatter free to use?

Yes, jsonformatter.me is completely free to use with no limitations. There are no signup requirements, no ads, and no data limits. You can format, validate, and view as much JSON as you need.

Is my JSON data secure?

Yes, your JSON data is 100% secure. All processing happens directly in your browser - no data is ever sent to our servers. Your JSON never leaves your computer, making it safe for sensitive data.

What is the difference between JSON formatter and JSON viewer?

A JSON formatter beautifies JSON text with proper indentation, while a JSON viewer provides an interactive way to explore JSON data through tree views, graphs, or other visualizations. Our tool includes both - you can format JSON in the editor and explore it in the Tree View tab.

Can this tool fix invalid JSON?

Yes! Our JSON formatter includes an intelligent auto-fix feature that can correct common JSON errors like trailing commas, single quotes instead of double quotes, unquoted keys, and missing commas. It will show you what was fixed automatically.

JSON Validator

Check JSON syntax and fix errors instantly

Open JSON Validator

Free, no signup required. Your data stays in your browser.

About This Tool

Our JSON validator checks your JSON for syntax errors and provides clear, actionable error messages. Find and fix issues quickly with line number references and automatic error correction.

Features

Instant Validation

Real-time syntax checking as you type or paste JSON

Clear Error Messages

Detailed error descriptions with exact line and column numbers

Auto-Fix Common Errors

Automatically correct trailing commas, single quotes, and more

Syntax Highlighting

Visual cues help you spot issues before validation

Error Highlighting

Problem areas are highlighted directly in the editor

JSON Lint Compatible

Validates against the same rules as popular JSON linters

How to Use

Paste Your JSON

Copy your JSON data and paste it into the editor

View Results

Invalid JSON will show an error message with details

Fix or Auto-Fix

Correct the error manually or click Format to auto-fix common issues

Common Use Cases

Validating API request/response payloads
Checking configuration files before deployment
Debugging JSON parsing errors
Verifying data before database import
Ensuring JSON compliance in CI/CD pipelines

Frequently Asked Questions

What does a JSON validator check?

A JSON validator checks that your data follows the JSON specification: proper use of quotes, correct bracket matching, valid escape sequences, no trailing commas, and proper data types. It ensures your JSON can be parsed by any JSON parser.

What are common JSON errors?

Common errors include: trailing commas after the last item, single quotes instead of double quotes, unquoted keys, missing commas between items, and unclosed brackets or braces. Our validator detects all of these.

Is this the same as JSONLint?

Our validator performs the same validation as JSONLint and other popular validators, but with additional features like auto-fix capabilities and a more user-friendly interface. It validates against the official JSON specification (RFC 8259).

Can you validate JSON against a schema?

Currently, our validator checks JSON syntax validity. JSON Schema validation (checking if data matches a specific structure) is a different feature that we may add in the future.

Try All Our JSON Tools

Format, view, validate, compare, and analyze JSON - all in one place.

Go to JSON Formatter