Is this csv to json converter free?

Yes, completely free. No sign-up, no daily limit, no watermark on the output.

Does the converter auto-detect data types?

Yes. Numbers and booleans are automatically converted to their proper JSON types instead of staying as strings.

What delimiter does the converter support?

Common delimiters including comma, semicolon, and tab are detected automatically, so most CSV files work out of the box.

How are empty values handled?

Empty cells become null in the JSON output, making it clear which fields are missing.

Can I convert CSV without headers?

The converter expects the first row to be headers. If your CSV has no headers, generic keys like column1, column2 are used instead.

Will my CSV be uploaded anywhere?

No. The conversion runs entirely in your browser, so your CSV data never leaves your device.

CSV to JSON Converter Online

What is CSV to JSON Conversion?

CSV to JSON conversion is the process of taking spreadsheet-style data (rows and columns separated by commas) and turning it into JSON, the format APIs and modern applications actually consume. The first row of the CSV becomes the keys, and every following row becomes a JSON object. A csv to json converter does that mapping for you so you don't have to write a parser by hand. You'll usually run a csv to json conversion when you've exported data from Excel, Google Sheets, or a database, and you need to push it into a tool that only speaks JSON.

Why Convert CSV to JSON?

Almost every API, mobile app, and JavaScript framework expects JSON. CSV is what business data looks like before it gets to a developer: a flat table from a spreadsheet, an export from a CRM, a dump from a database. Converting csv to json online is the fastest way to bridge those two worlds. Use a csv to json tool when you need to feed spreadsheet data into a REST API, seed a database with sample records, build a JSON file for a static site, or share data with a developer who doesn't want to parse CSV.

How Our CSV to JSON Converter Works

When you click Convert, the tool reads the first row of your CSV as headers and turns each following row into a JSON object using those headers as keys. Numbers and booleans are auto-detected so they don't end up as strings. Empty cells become null. Common delimiters (comma, semicolon, tab) are recognized automatically. Quoted fields with commas inside them are handled the standard CSV way. The conversion runs entirely in your browser, so your data never leaves your device.

Features You Get

One-click conversion: hit Convert and the JSON appears in the output panel.
Automatic type detection: numbers stay numbers, booleans stay booleans, empty cells become null.
Smart delimiter handling: commas, semicolons, and tabs are detected automatically.
Quoted-field support: values with commas or quotes inside them are parsed correctly.
Upload support: load a .csv file from your device or drag-and-drop it into the input.
One-click copy: grab the JSON output with the Copy button and paste it anywhere.

How to Use the Tool

Paste your CSV into the input editor, or use the Upload File button to load a .csv file.
Click the Convert button to generate the JSON output on the right.
Click the Copy button to copy the JSON to your clipboard.
Use the Clear button to reset both editors when you want to start over.

Common Use Cases

API seeding: turning a CSV export into JSON to POST records to your API.
Database imports: preparing JSON for tools that accept JSON but not CSV.
Static site data: building JSON data files from spreadsheet drafts.
Data hand-offs: sharing spreadsheet data with frontend developers who work in JSON.

Example Conversion

Input (CSV)

product,price,inStock
Widget,29.99,true
Gadget,49.99,false

Output (JSON)

[
  {
    "product": "Widget",
    "price": 29.99,
    "inStock": true
  },
  {
    "product": "Gadget",
    "price": 49.99,
    "inStock": false
  }
]

Frequently Asked Questions

Related Converters

JSON to CSV JSON to YAML YAML to JSON