JSON Formatter & Validator

Paste raw JSON to instantly format and validate it. Choose your indent style, minify to one line, or copy the result. Syntax errors are highlighted immediately.

Indent:

Input JSON

0 characters

Paste JSON above to auto-format with syntax validation.
All processing happens in your browser — nothing is sent to any server.

Frequently Asked Questions

How do I format JSON online?▼

Paste your raw JSON into the input field. The tool instantly formats it with proper indentation. Choose 2-space, 4-space, or tab indentation. Click 'Copy' to grab the formatted result.

How do I validate JSON?▼

Paste your JSON and the tool automatically checks for syntax errors. If there's a problem — missing comma, extra bracket, unquoted key — the error location is highlighted with a clear message.

What is the difference between JSON format and minify?▼

Formatting (or beautifying) adds indentation and line breaks to make JSON human-readable. Minifying removes all whitespace to create the smallest possible string — ideal for API payloads and configuration files.

Is it safe to paste sensitive JSON data?▼

Yes. This tool runs entirely in your browser. No data is sent to any server. Your JSON never leaves your machine, making it safe for API keys, tokens, and other sensitive payloads.

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