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📋 JSON Formatter

Format, minify, and validate JSON with samples, stats, download, and TypeScript, Go, Java, Python, and C# code generation.

This tool parses JSON locally in your browser. Samples are synthetic; do not paste production secrets, tokens, or personal sensitive data.

Safe Samples

Load a realistic developer scenario, then try beautify, minify, or code generation.

Structured Data Workbench

JSON is the default mode; SQL, XML, key rename, JSON/YAML, Schema, Diff, CSV/JSON, XML/JSON, YAML validation, and CSV cleanup are verified here.

Input & Output State

The result area becomes stale when input changes; download is enabled only for the current result.

Input Lines 0
Input Chars 0
Output Lines 0
Output Chars 0

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JSON formatting workbench with beautify, minify, syntax validation, JSON/YAML conversion, practical JSON Schema subset validation, JSON Diff, CSV/JSON conversion, XML/JSON conversion, YAML validation/formatting, CSV cleanup, multi-language code generation, safe sample loading, input/output stats, and result download. Convert JSON into TypeScript interfaces, Go structs, Java classes, Python dataclasses, or C# classes with inferred nested objects, optional fields, arrays, and unions. Input JSON, YAML, CSV, XML, schemas, diff data, and generated code are processed in the current browser and are not uploaded to LittleOne Tools servers. Generated types, schema validation reports, diff reports, converted output, and cleaned CSV should still be reviewed against your project conventions or target system schema.