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CSV to JSON

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Supported formats: .csv,.xlsx,.xls,.xlsm,.xlsb,.tsv

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About CSV to JSON

Convert CSV rows into structured JSON arrays or objects.

Developers love this tool. Transform flat CSV data into hierarchical JSON for your APIs, NoSQL databases (MongoDB), or frontend applications.

Supports custom nesting, data typing (numbers vs strings), and minification.

Category: Conversion & Export

Common Use Cases

  • Seeding databases from spreadsheets
  • Creating mock API responses
  • Migrating legacy data to modern apps

Key Features

  • Infers per-column data types so numbers and booleans aren't left as strings
  • Supports nested object output via dot-notation or underscore column naming
  • Outputs a JSON array of objects, ready to drop into fetch mocks or seed scripts
  • Toggle between minified and pretty-printed output

The CSV to JSON tool is compatible with: REST APIs, MongoDB, React/Vue Apps.

Run Schema Detect first if you're unsure how a messy CSV's columns should type, then feed the confirmed schema into this converter to get clean, correctly-typed JSON for your API or database seed.

Frequently Asked Questions

Can I control nesting and number vs string typing?

Yes, the converter supports custom nesting and data typing so numeric-looking values don't get stuck as strings unless you want them to.

Is the output minified or pretty-printed?

Both are supported, you can generate compact or readable JSON depending on your use case.

Built for developers who need spreadsheet data in code without hand-writing a parser.

Read the related guide →