Simple & private
CSV to JSON Converter
Convert simple comma-separated data to JSON.
What is this tool?
The CSV to JSON Converter turns small, comma-separated data with a header row into clean, readable JSON, matching each value to its column heading.
How to use this tool
- Paste your CSV data, with a header row on the first line.
- Click "Run tool".
- Copy the resulting JSON.
Example
CSV data with the header "name,age" and a row "Sam,30" converts to a JSON object with "name": "Sam" and "age": "30".
Common use cases
- Converting a small spreadsheet export for use in an app
- Preparing test data in JSON format from a CSV file
- Sharing tabular data with a developer as JSON
- Checking how CSV rows map to JSON fields
Frequently asked questions
Does it handle commas inside a cell? +
Yes. Values wrapped in double quotes can contain commas, and escaped quotes ("") inside a quoted value are also supported.
What happens if a row has fewer values than headers? +
Missing values are filled in as empty strings so the JSON structure stays consistent.
Should I check the output before using it? +
Yes, always check a few rows of the converted JSON, especially for larger or more complex files.