CSV to JSON

Trending 🔥

Convert CSV to JSON format

Developer Tools

How to Use CSV to JSON

  1. 1Paste your CSV data (first row = headers)
  2. 2Click Convert to JSON
  3. 3Copy or download the JSON output

About CSV to JSON

CSV to JSON Converter takes comma-separated value (CSV) data and transforms it into a JSON array of objects. The first row of your CSV is treated as the property names, and each subsequent row becomes an object in the resulting array — making it immediately usable in JavaScript, Python, or any language that consumes JSON.

The converter handles quoted fields (fields containing commas or newlines enclosed in double quotes), Windows line endings (CRLF), and outputs formatted, readable JSON. This makes it robust for real-world CSV files exported from Excel, Google Sheets, or database tools.

All conversion runs entirely in your browser with no file uploads needed. Paste your CSV data directly or load a file, and the JSON output is ready instantly.

Key Features of CSV to JSON

  • Convert CSV data to a JSON array of objects instantly
  • First row of CSV is automatically used as property keys
  • Handles quoted fields containing commas, quotes, or newlines
  • Supports both Windows (CRLF) and Unix (LF) line endings
  • Outputs formatted, pretty-printed JSON for readability
  • Works entirely in-browser — no file upload or server required
  • Copy or download the JSON output with one click
  • Handles large CSV files smoothly in the browser

Supported Formats

Input Formats

CSV (comma-separated values)CSV with quoted fieldsCSV with CRLF or LF line endings

Output Formats

JSON array of objects (formatted)

The first row must be a header row. All values are output as strings — type inference is not applied.

Examples

Convert a product list CSV to JSON

Transform an exported spreadsheet into a JSON array ready for an API or database import.

Input

name,price,stock
Widget A,9.99,120
Widget B,24.50,45

Output

[{"name":"Widget A","price":"9.99","stock":"120"},{"name":"Widget B","price":"24.50","stock":"45"}]

Convert CSV with quoted fields containing commas

Handle CSV fields that contain commas by wrapping them in double quotes.

Input

city,country
"New York, NY",USA
"London, UK",UK

Output

[{"city":"New York, NY","country":"USA"},{"city":"London, UK","country":"UK"}]

Common Use Cases

  • Transforming database export CSV files into JSON for API ingestion
  • Converting Excel/Google Sheets exports to JSON for JavaScript applications
  • Preparing CSV data from legacy systems for modern REST APIs
  • Prototyping with real data by quickly converting spreadsheet exports
  • Converting survey result exports from CSV to JSON for analysis tools
  • Migrating data between systems that use different serialization formats

Troubleshooting

Extra empty objects appear at the end of the JSON array

Solution

This is caused by trailing newlines in the CSV. Remove any blank lines at the end of your CSV before converting.

Fields with commas are split incorrectly

Solution

Fields containing commas must be wrapped in double quotes (e.g., "New York, NY"). Ensure your source data is properly quoted per the CSV standard.

Numbers appear as strings in the JSON output

Solution

The converter outputs all values as strings for safety. Parse the strings in your code using parseInt() or parseFloat() after importing.

Frequently Asked Questions

What delimiter is used?

The tool expects comma-separated values (CSV). Tab-separated (TSV) and semicolon-separated files are not currently supported.

How are numbers and booleans handled?

All values are output as JSON strings. Type conversion is not applied automatically.

What happens if a field contains a comma?

Fields containing commas must be enclosed in double quotes. The parser correctly handles RFC 4180-compliant quoted fields.

What if my CSV has no header row?

The first row is always treated as the header row. Manually add a header row with column names before pasting.

Can I convert a CSV file directly?

Yes, you can paste CSV content directly. No data is sent to a server — the conversion runs entirely in your browser.

What is the maximum CSV size I can convert?

There is no server-imposed limit. CSVs with tens of thousands of rows typically convert in under a second.

How do I handle CSV with special characters?

The tool handles UTF-8 encoded CSV, including accented characters, emoji, and other Unicode characters.

Is my data sent to a server?

No. All processing is done entirely in your browser. Your CSV data never leaves your device.