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Convert CSV to JSON Online — Free

Convert CSV to JSON in one click — free, in your browser, with header row detection and custom delimiter support. Paste CSV (comma, semicolon, or tab-separated) and the converter outputs a clean JSON array of objects keyed by header. Handles quoted fields, escaped commas, embedded newlines, and BOM. Output supports both pretty-printed and minified modes. Runs 100% client-side — your CSV data never leaves your browser. Safe for customer exports, financial data, and confidential spreadsheets. Use it for API seeding, database imports, JS/TS config generation, and quick spreadsheet-to-payload conversion.

How to convert csv to json online

  1. Paste your input (JSON, JWT, CSV, or other text) into the tool above.
  2. Choose the format/option you need — everything is computed in your browser.
  3. Copy the result with one click, or download it as a file.

Common use cases

  • Debugging API responses and inspecting JWT payloads
  • Pretty-printing minified JSON copied from network tabs or logs
  • Converting between data formats (CSV ↔ JSON, JSON ↔ YAML)
  • Validating syntax before pasting into config files
  • Sharing readable snippets with teammates in pull requests

Frequently asked questions

How do I convert CSV to JSON?

Paste your CSV above. The first row is auto-detected as the JSON keys; remaining rows become array items.

Does it handle quoted commas inside fields?

Yes — RFC 4180 quoting is fully supported, including escaped quotes ("") and embedded newlines.

Can I use a custom delimiter (semicolon, tab)?

Yes — pick semicolon, tab, or pipe in the options panel.

Is my CSV uploaded?

No — conversion runs entirely in your browser. Safe for sensitive data.