CSV to JSON Converter

What is a CSV to JSON Converter?

This tool turns CSV (comma-separated values) — the format exported by Excel, Google Sheets, and most databases — into JSON, the format that web applications and APIs consume. When header detection is on, each CSV row becomes a JSON object keyed by the column names from the first row.

The built-in parser is standards-aware: it correctly handles fields wrapped in double quotes, commas inside quoted values, escaped quotes (""), and values that span multiple lines — the cases that break naive split-by-comma approaches.

How to Convert CSV to JSON

• Paste your CSV data, or click Sample to load an example
• Choose the delimiter your file uses: comma, semicolon, or tab
• Keep "First row is header" on to produce an array of named objects
• Enable "Convert numbers & booleans" to type values automatically
• Copy the formatted JSON output and use it directly in your code

Automatic Type Conversion

By default, CSV stores every value as text. With type conversion enabled, the tool intelligently casts cells: numeric strings become numbers, the words true and false become booleans, and the word null becomes a JSON null. Everything else stays a string.

This produces JSON you can use immediately — comparing numbers, checking boolean flags, and avoiding the manual parseInt and JSON.parse calls you would otherwise need. Turn the option off when you want every field preserved exactly as text.

Who Uses This Tool?

Front-end developers use it to convert exported spreadsheets into seed data and fixtures. Back-end developers use it to import CSV datasets into NoSQL databases that expect JSON. Data analysts and product teams use it to reshape reports into a format their applications can read. The conversion happens entirely in your browser, so sensitive data never leaves your machine.