Skip to content
ConvertMyStuff
Tool

CSV to JSON Converter Pro

Convert CSV rows into a JSON array with file drop, header detection, and type inference.

Developer Tools
TryBasic CSVTyped columns

What this tool does

Paste CSV text and convert each row into a JSON object using the header row as keys.

How to use

  1. Drop a .csv file or paste CSV text.
  2. Toggle first row is header if your file has no header row.
  3. Enable type inference for numbers and booleans, then copy or download JSON.

Formula

Each CSV row maps to one JSON object; header cells become property names.

Examples

Basic CSV

Input: id,name 1,Ada 2,Grace

Output: [{"id":"1","name":"Ada"},{"id":"2","name":"Grace"}]

Header values become JSON keys for each row.

Typed columns

Input: sku,qty,active A1,10,true

Output: [{"sku":"A1","qty":10,"active":true}]

With type inference enabled, numeric and boolean cells parse as JSON types.

Learn more

Excel and UTF-8

If Excel garbles characters on import, save CSV as UTF-8 or use JSON to CSV with Excel BOM on the export step.

Common use cases

  • Convert spreadsheet exports for APIs
  • Turn CSV fixtures into JSON test data
  • Migrate tabular data into app configs

FAQ

Can I use CSV without a header row?

Yes. Uncheck first row is header and columns will be named column_1, column_2, etc.

Can I drop a CSV file?

Yes. Use file drop or paste text; processing stays in your browser.

Does type inference change strings?

When enabled, numeric and boolean-looking cells become JSON numbers and booleans.

How do I round-trip with Excel?

Edit CSV in Excel, then convert back here. Use JSON to CSV for the export step.

Source notes

  • RFC 4180-style CSV parsing with quoted fields.
  • Use JSON to CSV when exporting API data for spreadsheets.

Explore related workflows

Last reviewed: 2026-06-02