CSV ↔ JSON Converter & Cleaner

How to Convert CSV to JSON

1. Select the "CSV → JSON" tab and paste your CSV data into the input box.

2. Choose your delimiter (comma, semicolon, tab, or pipe) and check "First row is header" if applicable.

3. Click "Convert" — your JSON output appears instantly. Copy or download the result.

CSV to JSON Converter

Convert CSV (Comma Separated Values) data to JSON format instantly. Our converter handles quoted fields, embedded commas, multiline values, and all standard CSV edge cases. Supports custom delimiters including comma, semicolon, tab, and pipe characters. The first row is automatically used as JSON object keys when the header option is enabled.

JSON to CSV Converter

Convert JSON arrays of objects back to CSV format for use in Excel, Google Sheets, databases, or any spreadsheet application. Object keys become column headers, and nested values are properly stringified.

CSV Data Cleaner

• Remove duplicate rows: Automatically detect and remove identical rows from your dataset
• Trim whitespace: Clean leading and trailing spaces from all cells
• Remove empty rows: Strip out blank lines that cause import errors
• Preview in table: See your cleaned data in a table format before downloading

Use Cases

• Convert API responses (JSON) to spreadsheet format (CSV) for analysis
• Prepare CSV exports for import into databases, CRMs, or email platforms
• Clean exported data before uploading to Google Sheets or Excel
• Remove duplicate entries from mailing lists or customer data
• Transform data between systems that use different formats

FAQ

Does it handle quoted fields with commas? Yes. Fields wrapped in double quotes are parsed correctly, even if they contain commas, semicolons, or newlines.

What JSON format is produced? The output is a JSON array of objects, where each row becomes an object with header names as keys. Example: [{"name": "Alice", "age": 30}]

Can I clean CSV without converting to JSON? Yes. Use the "Clean & Dedupe" tab to remove duplicates, trim whitespace, and remove empty rows from CSV data.

Is there a size limit? The tool runs in your browser and can handle files with tens of thousands of rows. For very large files (100MB+), consider using command-line tools.