JSON to TypeScript
Paste a JSON response and get a clean set of TypeScript interfaces in return. Handles nested objects, arrays of mixed types, and optional fields. Save minutes per API integration.
runtime
Browser-local execution
Inputs stay inside the current tab unless you copy, download or explicitly export.
memory
Session handoff
Magic Paste can pass input to a target tool through sessionStorage, never through the URL.
control
User-owned state
Favorites, recent tools and workflow history are local browser data you can clear from the browser.
smart handoff graph
session handoff readySuggested next moves
/json
JSON Schema Generator
Infer JSON Schema from sample objects and arrays.
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JSON Repair
Fix common JSON-ish mistakes from AI output, logs and copied configs.
/json
JSONPath Query
Query nested JSON with JSONPath-style selectors and copy matched values.
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CSV ↔ JSON Converter
Convert CSV to typed JSON and JSON arrays back to CSV, with delimiter detection.
sponsor
Sponsor this toolFixed native slots for developer products. No third-party tracking, no popups, no layout shift.
01
How to use
- 01Paste a representative JSON sample on the left.
- 02Optionally rename the root type.
- 03Copy the generated TypeScript interfaces from the right.
02
FAQ
- Does it infer optional vs required fields?
- From a single sample it cannot — every field is treated as required. Paste an array of multiple samples to detect optional and union fields.
- Will my JSON be uploaded?
- No. Type generation runs entirely in your browser.
03
Related tools
- /json→JSON Schema GeneratorInfer JSON Schema from sample objects and arrays.
- /json→JSON RepairFix common JSON-ish mistakes from AI output, logs and copied configs.
- /json→JSONPath QueryQuery nested JSON with JSONPath-style selectors and copy matched values.
- /json→CSV ↔ JSON ConverterConvert CSV to typed JSON and JSON arrays back to CSV, with delimiter detection.