JSON ↔ CSV ConverterJSON ↔ CSV, browser-local
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AppHelp

Convert between JSON and CSV

Paste a JSON array of objects or CSV text and convert in either direction — everything runs locally.

JSON → CSV expects an array of objects; nested values are flattened with dot notation.
id,name,skills.0,skills.1,meta.active
1,Ada,js,go,true
2,Linus,c,,false

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Features

  • Convert a JSON array of objects to CSV
  • Convert CSV back to JSON objects
  • Flatten nested objects and arrays with dot notation
  • Comma, semicolon, or tab delimiter with RFC 4180 quoting

Frequently asked questions

How are nested objects handled?
Nested objects and arrays are flattened using dot notation, for example a.b or a.0, so every leaf becomes its own column.
Which delimiters are supported?
You can choose comma, semicolon, or tab. Values containing the delimiter, quotes, or newlines are quoted per RFC 4180.
Is my data uploaded?
No. The conversion runs entirely in your browser and nothing is sent to a server.