JSON Formatter & Beautifier Online
Beautify & pretty-print JSON with configurable indentation
Did you know?
Valid JSON keys must be double-quoted. Standard single quotes or no quotes around keys will cause a parse error in most strict environments.
Como usar JSON Formatter
- 1
Paste your JSON
Enter or paste raw or minified JSON into the editor.
- 2
Choose indentation
Select 2 spaces, 4 spaces, or tab from the dropdown.
- 3
Click Format
Your JSON is instantly pretty-printed in the output panel.
Perguntas frequentes
Is my data safe?
What is the difference between formatting and validating JSON?
Can it handle large JSON files?
What indentation style does it use by default?
Saiba mais
O que é JSON Formatter?
Format and beautify JSON data instantly with configurable indentation. Paste messy, minified, or unreadable JSON and get clean, indented output in one click. Supports 2-space, 4-space, and tab indentation. Perfect for debugging API responses, editing config files, and preparing JSON for documentation. Everything runs in your browser — your data is never sent to any server.
Por que usar JSON Formatter?
- Instant formatting — paste unreadable JSON and get clean, indented output in one click.
- Configurable indentation — choose 2 spaces, 4 spaces, or tabs to match your code style.
- Syntax error detection — invalid JSON is caught immediately with a clear error message.
- Client-side processing — your JSON (API keys, tokens, config data) never leaves your browser.
- No installation — works immediately in any browser without plugins or extensions.
Casos de uso de JSON Formatter
API response debugging
Paste raw API responses to make them readable. Quickly find specific fields in deeply nested JSON structures.
Config file editing
Format package.json, tsconfig.json, or other config files for easier editing.
Documentation
Format JSON examples for README files, tutorials, or API docs with consistent indentation.
Code review
Beautify minified JSON payloads to understand structure during pull request reviews.
Dicas e boas práticas
- 💡Use 2-space indentation for web projects — it's the most common style and produces smaller formatted files.
- 💡After formatting, pair with the JSON Validator to confirm there are no hidden syntax errors.
- 💡Pair this tool with the YAML-JSON converter to switch between configuration formats.
- 💡For very large JSON files, format a portion at a time if your browser becomes slow.
Como funciona
The formatter uses JavaScript's built-in JSON.parse() and JSON.stringify() with configurable indentation. This ensures 100% compatibility with the JSON specification (RFC 8259). Error messages come directly from the browser's JSON parser.
Leitura adicional