JSON Formatter
Format, validate, and minify JSON data. View as tree structure.
About JSON Formatter
Paste raw JSON from API responses, config files, or databases and instantly format it with proper indentation. Validate syntax, explore nested structures in tree view, and minify for production use.
How It Works
- Paste your JSON data into the editor
- View formatted output with syntax highlighting
- Copy or download the result
Key Features
- Pretty print with customizable indentation
- Syntax validation with error highlighting
- Tree view for nested data exploration
- One-click minification for production
Frequently Asked Questions
- What does a JSON formatter do?
- A JSON formatter takes raw, unindented JSON text and adds proper whitespace, line breaks, and indentation to make it human-readable. It also validates the JSON syntax, highlighting missing brackets, commas, or quote issues so you can fix them instantly.
- How do I fix a JSON syntax error?
- JSON syntax errors are usually caused by trailing commas after the last item, missing quotes around keys, single quotes instead of double quotes, or unbalanced brackets. The formatter highlights the exact error location — fix the indicated line and re-paste to validate.
- What is JSON minification and when should I use it?
- Minification removes all whitespace, newlines, and formatting from JSON to produce the smallest possible file. Use it in production APIs, configuration files, and data payloads to reduce bandwidth. Never minify JSON you are still actively editing.
- Is this JSON formatter safe to use with sensitive data?
- Yes — all processing happens entirely in your browser. Your JSON data never leaves your device or gets sent to any server. You can safely paste API keys, tokens, or any sensitive configuration without privacy concerns.