CSV ↔ JSON Converter

CSV ↔ JSON Converter
About CSV & JSON

CSV (Comma-Separated Values) is a simple format for tabular data, commonly used in spreadsheets and databases.

JSON (JavaScript Object Notation) is a flexible data format ideal for APIs and modern applications.

Features
  • Bidirectional conversion
  • Custom delimiters support
  • Header row detection
  • Number parsing option
  • File upload & download
  • Quoted field handling
Tips
  • For Excel, use semicolon delimiter
  • Quoted values preserve commas
  • Enable "Parse numbers" for numeric data
  • JSON array must contain objects

Online CSV to JSON Converter Tool

Convert CSV files to JSON format and vice versa with our free online tool. Perfect for data migration, API integration, and working with spreadsheet exports.

CSV to JSON Conversion Features

  • Automatic header detection and column mapping
  • Support for various delimiters (comma, semicolon, tab, pipe)
  • Handles quoted fields with embedded delimiters
  • Optional number parsing for numeric values
  • File upload support for large CSV files
  • Download converted JSON/CSV files

Common Use Cases

  • Export spreadsheet data to JSON for web applications
  • Convert API responses to CSV for analysis
  • Database import/export operations
  • Data transformation in ETL pipelines

Related Tools

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CSV/JSON Questions

CSV is a flat table format - one row per line, values separated by commas. JSON is structured and supports nested objects and arrays. CSV works everywhere (Excel, databases, R, pandas). JSON is native to web APIs and JavaScript. Convert CSV to JSON when your code needs structured data from a spreadsheet.

When importing spreadsheet or database export data into a web API or JavaScript app. When your data has enough structure that flat CSV is awkward. When the receiving system expects JSON. For the reverse (JSON to CSV), use it when you want to open structured data in Excel or a database tool.

Comma is the standard. European locales often use semicolons (comma is their decimal separator). Tab-delimited (TSV) avoids quoting issues when values contain commas. Pipe-delimited is rare but useful for data with many commas. Match whatever your source or target expects.