100% Free•No Signup•Works in Your Browser

Make JSON Work For You

Work with JSON more easily using online tools for formatting, validation, editing, comparison, and conversion.
Debug API responses, clean up configuration files, and prepare structured data for other formats.

{ }
Drag & drop your JSON file here or Supports JSON files • Max file size: 50 MiB

Get started with the most-used JSON tools.

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Paste JSON and start working instantly.

Processing happens locally in your browser.

INPUT JSON
OUTPUT
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Fast & Reliable

Process JSON instantly without uploading it to a server.

♙
100% Private

Your JSON stays on your device while you work.

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No Signup Required

Start using the tools immediately.

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Completely Free

Core JSON tools are free to use in your browser.

1
Upload or Paste

Drop a JSON file, browse for one, or paste JSON.

2
Choose a Tool

Format, validate, view, compare or convert your data.

3
Copy or Download

Use the result directly or save it as a file.

That's it!

Explore JSON Tools

Choose an online JSON tool for the task at hand. RomitJSON brings common workflows together, from reading an API response and checking syntax to comparing documents and converting compatible data.

Format and Read JSON

Compare and Optimize JSON

Convert JSON to Other Formats

What Is JSON?

JSON, short for JavaScript Object Notation, is a lightweight text format used to represent structured data. It is widely used in web APIs, application settings, data exchange, and software development.

A JSON object stores information as key-value pairs, while arrays hold ordered collections of values. JSON supports strings, numbers, booleans, null, objects, and arrays.

{
	"name": "Aarav",
	"role": "Developer",
	"active": true,
	"skills": ["JavaScript", "JSON", "APIs"]
}

This example contains a name, role, active status, and list of skills. A formatter can make the structure easier to read, while a validator checks its syntax. Conversion tools can transform compatible data for other workflows.

Why Use Online JSON Tools?

Read complex data more easily

API responses and configuration files can contain deeply nested objects and arrays. Formatting and viewing tools help you inspect that structure without manually adding line breaks.

Find syntax errors

JSON has strict syntax rules. Property names and strings require double quotes, and trailing commas are not allowed. A validator can help identify errors before you use the data elsewhere.

Compare changes

When JSON changes between two versions, a comparison tool can help review the differences instead of reading both documents line by line.

Convert data for different workflows

Depending on the structure, conversion tools can prepare data for CSV, YAML, XML, or TypeScript definitions. Review the result against the requirements of the destination application.

Simplify everyday development tasks

From checking API responses to preparing sample data, focused JSON tools can reduce repetitive manual work during development and debugging.

Common JSON Syntax Mistakes

JSON is simple to read, but small syntax errors can make a document invalid.

Using single quotes

Invalid: {'name': 'Aarav'}
Valid:   {"name": "Aarav"}

Adding a trailing comma

Invalid:
{
	"name": "Aarav",
}

Valid:
{
	"name": "Aarav"
}

Leaving a string unquoted

Invalid: {"city": Patna}
Valid:   {"city": "Patna"}

Use the JSON Validator when you are unsure why a document is failing to parse.

Who Can Use RomitJSON?

Developed by Romit Kr Yadav

RomitJSON is an independent project built and maintained by Romit Kr Yadav to make working with JSON simpler for developers.

Common questions.

Are the RomitJSON tools free?

Yes. The tools are free to use in a modern web browser and do not require an account. Check each tool page for its current file size limits and feature details.

Do I need to install software?

No separate installation is needed for the browser-based tools. Open a tool page in a modern browser and enter or load JSON.

What should I do if my JSON is invalid?

Use the JSON Validator to check syntax, then review issues such as missing quotes, unmatched braces, missing commas, or trailing commas.

Can I convert any JSON file to CSV?

Not every JSON structure maps neatly to a table. CSV works best for tabular data; nested objects and arrays may require flattening or a defined conversion rule. See the JSON to CSV Converter for its supported options.

Can I generate SQL from any JSON data?

The JSON to SQL Converter works best with arrays of objects or a single record. Nested data can be flattened or stored as JSON text. Review the generated table types and SQL for your database before running it.

Is JSON to TypeScript conversion always accurate?

No. The JSON to TypeScript Converter infers types from the sample it receives. Missing fields, nullable values, empty arrays, and values with multiple possible types may need manual adjustments.

Is my JSON data private?

JSON tool inputs are processed locally in your browser. The JSON to YAML page loads its conversion library from jsDelivr, but the JSON input is processed locally after the library loads. Review the data-handling information before using sensitive data, and do not include secrets or confidential values.

Work with JSON
without the hassle.