JSON Tools
JSON Tools
Beautify, minify, escape or tree-view JSON; repair broken JSON; flatten/unflatten nested objects; generate JSON Schema; validate data against a JSON Schema; convert between JSON and YAML, XML, a query string, or a Markdown table; generate TypeScript interfaces or C# POCO classes; compare two JSON documents; query with JSONPath or JSONata expressions. Bidirectional CSV, TSV and JSONL conversion. Also includes a Package.json Inspector to analyse npm dependencies, scripts, and issues.
JSON Tools
Beautify, minify, escape or tree-view JSON; repair broken JSON; flatten/unflatten nested objects; generate JSON Schema; validate data against a JSON Schema; convert between JSON and YAML, XML, a query string, or a Markdown table; generate TypeScript interfaces or C# POCO classes; compare two JSON documents; query with JSONPath or JSONata expressions. Bidirectional CSV, TSV and JSONL conversion. Also includes a Package.json Inspector to analyse npm dependencies, scripts, and issues.
Common uses
- Pretty-print a minified JSON blob
- Repair broken JSON with trailing commas or comments
- Flatten nested JSON to dot-notation keys
- Generate JSON Schema from a sample document
- Validate an API response against a JSON Schema
- Generate TypeScript types from a JSON sample
- Generate C# POCO classes from a JSON sample
- Diff two JSON configs side by side
- Convert CSV to JSON
- Convert JSON array to JSONL
- Convert JSON to XML
- Convert JSON to a query string
- Convert a JSON array to a Markdown table
- Inspect all dependencies in a package.json
Frequently asked questions
How do I format (pretty-print) JSON?
Paste your JSON into the input and click Beautify. The tool re-indents the document with your chosen spacing and validates it at the same time, highlighting the exact line of any syntax error.
Can it repair broken or invalid JSON?
Yes. The Repair mode fixes common problems such as trailing commas, single quotes, unquoted keys, and JavaScript-style comments, then returns strict, valid JSON.
How do I convert JSON to another format?
Use the conversion tabs to turn JSON into YAML, XML, CSV/TSV, a query string, a Markdown table, or generate TypeScript, C#, or Java types from a sample document — all bidirectional where it makes sense.
Is my data uploaded to a server?
No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.