Converter Knowledge Base

CSV to JSON Converter: Parse Spreadsheets to JSON Instantly

Convert CSV spreadsheets to JSON arrays online. Auto-detects headers, infers data types, and handles quoted fields. Free, browser-only, no upload needed.

Converting CSV to JSON for APIs and Databases

CSV files from Excel exports, database dumps, and analytics tools need to be transformed into JSON before being consumed by REST APIs, NoSQL databases, or JavaScript applications. Our browser-based converter handles this transformation instantly.

Smart Type Inference

The converter automatically infers data types from CSV values:

  • Numeric strings ("42") → JavaScript number
  • "true" / "false" → JavaScript boolean
  • Empty fields → null
  • Everything else → string

Flexible Parsing Options

  • Custom delimiter (comma, semicolon, tab, pipe)
  • First-row-as-header toggle
  • Output as array of objects or array of arrays

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Frequently Asked Questions

Does the CSV to JSON converter handle quoted fields?

Yes. Fields wrapped in double quotes, including those containing commas or newlines, are correctly parsed.

What happens if a CSV row has missing columns?

Missing column values are represented as null in the JSON output to maintain consistent object shapes.

Can I import Excel .xlsx files?

Export your Excel file as CSV first (File → Save As → CSV), then paste the CSV text into the converter.

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