All Tools
JSON & Data Tools
This is the complete UrsaKit JSON toolbox. Everything runs client-side, so even sensitive payloads stay on your machine.
Start with the formatter if you only need readable output, use the validator to find a syntax error, and reach for a converter when JSON has to become another format.
All JSON tools
- JSON Formatter & Schema InspectorOne-click format, compress, validate JSON.
- YAML to JSONYAMLConvert YAML into JSON with nested maps, lists and anchors preserved.
- XML to JSONXMLConvert XML into JSON, keeping attributes in @-prefixed keys.
- JSON to TypeScriptTSGenerate TypeScript interfaces from a JSON sample automatically.
- YAML FormatterYAMLRe-indent YAML while keeping comments and anchors intact.
- XML FormatterXMLIndent XML with correct nesting and readable attributes.
- YAML ValidatorYAMLCheck YAML syntax and locate the first error by line and column.
- XML ValidatorXMLCheck that XML is well-formed and find the broken line.
- CSV to JSONCSVConvert CSV or TSV into a JSON array with optional header row and typing.
- JSON DiffDIFFCompare two JSON documents and see added and removed lines.
- JSON Lines ViewerNDJSONInspect NDJSON: record counts, invalid lines and a JSON preview.
- JSON FormatterFORMATFormat and beautify JSON in your browser with 2 or 4-space indentation and optional key sorting. Instant, private and fully local.
- JSON MinifierMINIFYMinify JSON by stripping whitespace in one click. Reduce payload size for APIs and configs, all locally in your browser.
- JSON ValidatorVALIDATEValidate JSON as you type with line and column error positions. Find missing commas, quotes and brackets instantly.
- JSON Parser & Tree ViewerVISUALIZEParse and explore JSON as an interactive tree. Expand, collapse and inspect nested objects and arrays.
- JSONPath TesterJSONPATHTest JSONPath expressions against your JSON and preview matches instantly. Runs entirely in your browser.
- JSON Schema GeneratorSCHEMAGenerate a JSON Schema from your JSON data in one click, with strict-mode options and downloadable output.
- JSON to YAML ConverterCONVERTConvert JSON to YAML in your browser. Clean, spec-compliant output with no uploads and no sign-up.
- JSON to XML ConverterCONVERTConvert JSON to XML in your browser and copy the result. Nothing is uploaded.
- JSON to CSV ConverterCONVERTConvert a JSON array of objects to CSV in one click, with proper quoting for commas and quotes.
How to pick the right JSON tool
- Beautify or compact JSON: use the Formatter or the Minifier.
- Find a syntax error or explore the tree: use the Validator or the Parser.
- Transform the data: JSONPath Tester for queries, and JSON to YAML, XML or CSV for format changes.
FAQ
JSON tools FAQ
Is there a size limit for JSON input?
No server-side limit, because parsing happens in your browser. Very large files are bounded by available memory.
Can I convert YAML or CSV back to JSON?
Not yet — the converters are one-way for now. Reverse converters are on the roadmap.
Does the JWT decoder verify the signature?
No. It decodes the header and payload so you can read the claims; it does not validate the signature.