JSON Formatter and Validator

Introduction

The JSON Formatter and Validator helps you turn compact or messy JSON into readable structure, minify formatted JSON, and catch syntax errors. It is useful for developers, analysts, testers, and anyone copying data between systems.

About this json formatter tool

JSON is strict: property names need double quotes, comments are not allowed, trailing commas break parsing, and brackets must match. A formatter is helpful because it confirms the text can be parsed before it makes indentation changes. That separates valid data from text that only looks like JSON.

How this tool works

Paste JSON, choose format or minify, and review the output. The browser parses the input first; if parsing fails, the error message points toward the syntax problem. Formatting changes whitespace only, while minifying removes unnecessary whitespace after the data is valid.

1. Paste JSON into the editor.
2. Choose format or minify.
3. Use any error message to find invalid JSON syntax.

When to use this tool

Use it when inspecting API responses, cleaning examples for documentation, comparing payloads, preparing configuration snippets, or checking copied analytics data. For very large files or sensitive production data, use your local development tools instead.

Good to know

• The tool parses JSON in your browser and does not upload the content.
• JSON requires double-quoted property names and does not allow trailing commas.