{ } JSON Formatter & Validator
Format, clean, and validate your JSON data. Processing happens entirely offline in your browser.
JSON Input
JSONPath Filter (jq-light)
Formatted JSON
Formatted JSON will be displayed here.
Guide & best practices
JSON Formatter, Validator and Pretty Printer
Clean up JSON, find syntax errors and prepare API responses for debugging, reviews or documentation.
Typical use cases
Useful for API debugging, logs, config checks, CLI/browser copy-paste and structured data reviews.
How Balou processes JSON
The tool parses JSON locally, shows syntax problems, formats with indentation or minifies for compact output.
JSON best practices
Avoid real secrets in examples, use consistent indentation, inspect large API responses gradually and combine with Transformer or Diff.
Frequently asked questions
Are JSON inputs sent to the server?
Core functions run locally in the browser.
Can it repair invalid JSON?
It highlights syntax issues; automatic fixes should always be reviewed.
Pretty Print vs Minify?
Pretty Print improves readability, Minify removes whitespace for compact output.
Which tools complement it?
JSON Transformer, YAML JSON Converter and Text Diff.