JSON Formatter & Linter

What is JSON Formatter & Linter?

An interactive tool that beautifully formats JSON text while simultaneously detecting syntax errors. This tool offers:

• Real-time validation of JSON syntax correctness
• Clear highlighting of problem areas with specific error messages
• Customizable formatting styles to match your preferences
• Hierarchical display of complex JSON data for improved readability

Perfect for debugging during development, checking API responses, editing configuration files, and many other scenarios.

How to use JSON Formatter & Linter

As you type or paste JSON text into the input area, syntax checking and formatting happen instantly. If the syntax is valid, beautifully formatted JSON appears in the output area according to your selected formatting style.

If errors are detected, the problematic sections are highlighted with specific error messages, making it easy to quickly identify and fix issues.

Making the Most of Formatting Options

We provide several customization options to meet various needs:

Indent Method Selection

The "Indent" setting allows you to choose from:

• Spaces - Standard display format with excellent readability (default)
• Tab - Tab width can be adjusted freely in some editors
• None - Removes all indentation, line breaks, and extra whitespace for a compact format

Indent Width Customization

When you select spaces in the "Indent" setting, you can choose from these indent widths:

• 2 spaces (default)
• 4 spaces
• 6 spaces
• 8 spaces

About JSON (JavaScript Object Notation)

JSON is a lightweight data interchange format with the following basic syntax rules:

• Enclose strings in double quotation marks "" (single quotation marks are not allowed)
• Enclose the whole structure in {} (for objects) or (for arrays)
• Key:Value pairs form a single data unit, separated by a colon :
• Separate data items with commas , (no comma needed after the last item)

For more information, see Working with JSON and JSON.