JSON to CSV Flatten

Convert nested JSON objects into a flat CSV structure. This JSON to CSV flatten tool is useful for exporting API responses into spreadsheets, BI tools, or reports.

1. Paste your JSON array or object into the input editor.
2. Set the max depth, key separator, and array handling.
3. Click Convert to generate the CSV output.
4. Copy the CSV into your spreadsheet or database import.

{
  "user": {
    "id": 42,
    "profile": {
      "name": "Ada",
      "team": "Infra"
    }
  }
}

Output columns: user.id, user.profile.name, user.profile.team.

Does the tool validate JSON? Yes. Invalid JSON will return an error above the editors.

What separator should I use? The default dot separator works for most CSV imports.

How are arrays handled? Choose index expansion, join values, or stringify arrays.

• JSON Formatter
• JSON Lint
• JSON to CSV
• CSV to JSON