Can the formatter fix invalid JSON?

The formatter validates and formats valid JSON. It reports the exact location of syntax errors but cannot automatically fix them — you need to correct the error manually.

What is the difference between formatting and minifying?

Formatting adds indentation and newlines for human readability. Minifying removes all unnecessary whitespace for smaller file sizes — used for production APIs and configs.

Why does my JSON have "unexpected token" errors?

Common causes: trailing commas (not allowed in JSON), single quotes instead of double quotes, or unquoted keys. JavaScript objects are not valid JSON.

Can I format very large JSON files?

Yes. The tool handles large JSON efficiently in your browser. For extremely large files (10+ MB), performance depends on your device.

Outils de Développement

Formater et valider JSON, XML, YAML et SQL avec coloration syntaxique

Formateur de Données

Formater et valider JSON, XML, YAML et SQL avec coloration syntaxique

Hors ligneConfidentialitéTemps réel

Formateur et Validateur de Données

Options de Formatage

Indentation

Trier les ClésSupprimer les CommentairesMinifier

JSON Input

Learn more about JSON Formatter & Beautifier

About JSON Formatter & Beautifier

Format minified or unformatted JSON into clean, indented, human-readable form. Also validates JSON syntax and reports exact error locations for malformed data. Can also minify JSON to the smallest possible size.

Key features

Pretty-prints JSON with configurable indentation
Validates JSON and shows exact error location
Minify mode to compress JSON for production
Syntax highlighting for easy reading
Handles large JSON payloads quickly

How to use JSON Formatter & Beautifier

1Paste your JSON data into the input area
2The formatter validates and formats it automatically
3If there are errors, the exact line and character position are shown
4Click "Copy" to copy the formatted JSON

Frequently asked questions

Can the formatter fix invalid JSON?: The formatter validates and formats valid JSON. It reports the exact location of syntax errors but cannot automatically fix them — you need to correct the error manually.
What is the difference between formatting and minifying?: Formatting adds indentation and newlines for human readability. Minifying removes all unnecessary whitespace for smaller file sizes — used for production APIs and configs.
Why does my JSON have "unexpected token" errors?: Common causes: trailing commas (not allowed in JSON), single quotes instead of double quotes, or unquoted keys. JavaScript objects are not valid JSON.
Can I format very large JSON files?: Yes. The tool handles large JSON efficiently in your browser. For extremely large files (10+ MB), performance depends on your device.