How to Format JSON Online (Free and Easy)

Formatting JSON by hand is tedious and error-prone. Whether you're debugging an API response, cleaning up config files, or making logs readable, a free online JSON formatter saves time and catches syntax errors.

Why Format JSON?

• Readability: Minified or single-line JSON is hard to scan. Indentation and line breaks make structure obvious.
• Validation: Invalid JSON breaks apps and APIs. A formatter highlights errors and often points to the exact line.
• Debugging: When you paste a response or config into a formatter, you can collapse and expand sections to focus on the part you care about.

How to Use a Free JSON Formatter

1. Copy your JSON from a file, API response, or log.
2. Paste into the input area of the formatter.
3. Click Format (or rely on live formatting). You get indented, syntax-highlighted output.
4. Fix errors if the tool reports invalid JSON—check missing commas, quotes, or brackets.
5. Copy the result or use Minify if you need a compact string (e.g. for a URL or payload).

No sign-up or installation is required. Everything runs in your browser, so your data never has to leave your machine if you use a client-side tool.

What to Look For in an Online JSON Tool

• Format and minify in one place
• Validate and show clear error messages
• Syntax highlighting for keys, values, and types
• Copy button for the formatted or minified result
• No account required and no data stored on the server

Use our free JSON Formatter & Validator to format, validate, and minify JSON in seconds.