Everyday Tools
CSV to JSON converter
Paste CSV or spreadsheet data and get a clean JSON array of objects, with numbers and booleans typed automatically. Free, fast, private, and entirely browser-based.
From spreadsheet rows to structured data
CSV is how almost every spreadsheet, database, and analytics tool exports tabular data — but most code and APIs expect JSON. This converter bridges the two: it treats your first row as headers and turns every subsequent row into a JSON object keyed by those headers, giving you an array you can drop straight into JavaScript, a database seed, or an API request.
It also types your values intelligently. A cell containing 42 becomes the number 42, and truebecomes a boolean — so you don't have to clean up the output by hand. Everything runs locally, keeping even private exports on your machine.
Example
CSV in
name,age,active John,30,true Mia,27,false
JSON out
[
{ "name": "John", "age": 30, "active": true },
{ "name": "Mia", "age": 27, "active": false }
]Frequently asked questions
- How does the CSV to JSON converter work?
- It reads the first line of your CSV as the column headers, then maps each following row into a JSON object using those headers as keys. The result is a JSON array of objects, one per row.
- Does it detect numbers and booleans?
- Yes. Numeric strings are converted to JSON numbers, and 'true'/'false' become booleans automatically, so your JSON is properly typed rather than all strings.
- Is this tool free?
- Yes. Every everyday utility tool here is completely free, with no sign-up and no limits.
- Does my CSV get uploaded anywhere?
- No. The conversion runs entirely in your browser, so even confidential spreadsheets and exports stay on your device.
- What delimiters are supported?
- Comma-separated values are the default. Values containing commas, quotes, or line breaks should be wrapped in double quotes as per standard CSV rules, and they'll be parsed correctly.
- What can I do with the JSON output?
- Use it to seed a database, feed an API, configure an app, or load into JavaScript. You can copy it or paste it straight into the JSON Formatter to validate and beautify it.