CSV to JSON Converter Online (Free, Private)

Convert CSV spreadsheets to JSON arrays online. Free browser-based converter — your data stays on your device.

CSV is universal for spreadsheets and exports; JSON is standard for APIs and JavaScript apps. Converting between them is a daily task for data engineers and frontend developers.

Tips for clean conversion

  • Ensure the first row contains column headers
  • Watch for commas inside quoted fields
  • Large files may be slow — Utilio processes locally without upload
  • Use JSON to CSV for the reverse transformation
Convert CSV to JSON →

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