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CSV First Aid

JSON to CSV

Paste a JSON array or drop a .json file. Keys across all objects become the header row, values become cells, missing keys become empty cells — no schema needed.

Drop your CSV file here

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Converts a JSON array of objects to CSV.

How it works

  1. 1Drop your .json file above or paste JSON text.
  2. 2CSV First Aid extracts all unique keys as column headers and maps each object to a row.
  3. 3Download the result as a standard CSV file.

FAQ

Does it handle nested objects?

Nested objects are stringified as JSON within the cell. Arrays are joined with commas. For deep nesting, consider flattening first.

What if objects have different keys?

All unique keys across all objects are collected as headers. Missing keys in an object produce empty cells.

Related tools

CSV to JSON

CSV in, JSON array out. Headers become the object keys. Works with any delimiter the file uses — comma, semicolon, tab, pipe.

CSV to Excel (XLSX)

CSV in, .xlsx out. Encoding is detected from the bytes, special characters survive the round-trip, column widths auto-fit. Opens the same in Excel, Google Sheets, and Numbers.

CSV Viewer

A CSV rendered as a real table — zebra rows, a search box, page through 200K rows without ever opening Excel. Encoding and delimiter are figured out from the bytes.