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JSON to CSV

Convert a JSON / JSON5 object array to CSV with inferred union headers.

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Input

Result

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Using this tool

Export object arrays as CSV with union headers for spreadsheet imports.

Actions: Process

Example

Use commas and include headers; unquoted JSON5 keys are accepted and missing fields become empty cells.

Example action and settings

Action: Process
Delimiter: Comma
Include header: On
Neutralize spreadsheet formula prefixes: Off

Input / action

[{name:"Ada",score:95},{name:"Lin",active:true}]

Result / expected behavior

name,score,active
Ada,95,
Lin,,true

Available options: Delimiter · Include header · Neutralize spreadsheet formula prefixes

Scope and limitations

Limited to 1,000,000 input characters and 1,000,000 output cells; nested objects become JSON text, not flattened columns.

Common mistakes

The top level must be an array of objects; consider formula-prefix neutralization before opening untrusted CSV.

Related tools

YAML formatter & validator

Privacy and browser support

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