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
Common tasks
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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.