JSON Toolkit

Format, validate, diff, convert, and generate code from JSON — all in one place.

All JSON Toolkit Tools

Open each tool on its own page for detailed guides, examples, and best practices.

JSON FormatterFree online JSON formatter and validator with syntax highlighting and error line numbers. Use as default for beautify+validate+minify in one place; for two-file comparison use json-diff, for schema generation use json-schema-generator. Input: JSON ≤10MB. Returns formatted JSON or line-numbered error. 100% private.
JSON Diff CheckerCompare two JSON documents and highlight added, removed, and changed keys with line-level diff. Use when comparing API responses or configs; for single-document formatting use json-formatter, for validation errors use json-validator. Input: two JSON texts ≤10MB. Returns highlighted diff. 100% client-side.
JSON BeautifierPretty-print minified JSON with 2-space indentation and syntax highlighting. Use when readable JSON is needed; for minifying use json-minifier, for full validate+format workflow use json-formatter. Input: JSON text ≤10MB. Returns formatted JSON or line-numbered error. 100% client-side.
JSON MinifierCompress JSON by stripping whitespace for smallest payload. Use when preparing production payloads; for readable output use json-formatter or json-beautifier. Input: JSON text ≤10MB. Returns minified JSON or line-numbered error. 100% client-side.
JSON ValidatorValidate JSON syntax and report errors with line numbers without reformatting. Use when only correctness matters; for auto-fix and formatting use json-formatter. Input: JSON text ≤10MB. Returns valid/invalid + error location. 100% client-side.
JSON to CSV ConverterConvert JSON arrays to CSV for spreadsheets. Paste JSON, pick a delimiter, and download the CSV instantly.
JSON to XML ConverterConvert JSON to XML with root element control. Use for JSON input only; for reverse use xml-to-json, for JSON to YAML use json-to-yaml. Input: JSON ≤10MB. Returns XML or line-numbered JSON error. 100% client-side.
XML to JSON ConverterConvert XML to JSON preserving attributes and nesting. Use for XML input only; for reverse use json-to-xml. Input: XML ≤10MB. Returns JSON or XML parse error. 100% client-side.
JSON to YAML ConverterConvert JSON to YAML for configs. Use for JSON input; for YAML validation use yaml-formatter, for TOML cross-format use toml-converter. Input: JSON ≤10MB. Returns YAML or JSON error. 100% client-side.
JSON to TypeScriptGenerate TypeScript interfaces from JSON with optional readonly and export. Use for TS types; for Go use json-to-go, for generic code use json-to-code. Input: JSON ≤10MB. Returns .ts interfaces or JSON error. 100% client-side.
JSON to Go StructGenerate Go structs with json tags from JSON. Use for Go only; for TypeScript use json-to-typescript. Input: JSON ≤10MB. Returns Go code or JSON error. 100% client-side.
JSON Schema GeneratorInfer JSON Schema from sample JSON for validation. Use when authoring schemas; for validating instances use json-validator. Input: JSON ≤10MB. Returns JSON Schema draft. 100% client-side.
JSON Path FinderFind JSONPath expressions by clicking any key. Use when querying APIs; for formatting use json-formatter. Input: JSON ≤10MB. Returns matching paths and values. 100% client-side.

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