CSV to JSON Converter
CSV to JSON ConverterCSV → JSON
About CSV to JSON
This tool converts CSV (Comma-Separated Values) data to JSON format, making it easy to use spreadsheet data in web applications and APIs. It supports automatic delimiter detection, handles quoted values with commas, and can optionally parse numbers and booleans. All processing happens in your browser for complete privacy.
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About CSV to JSON Conversion
CSV (Comma-Separated Values) is the most common format for exporting data from spreadsheets and databases. Converting CSV to JSON makes this data usable in modern web applications, APIs, and JavaScript-based systems that work natively with JSON.
This free tool automatically detects the delimiter used in your CSV file (comma, semicolon, tab, or pipe) and converts each row into a JSON object with column headers as keys. It handles quoted values with embedded commas and can optionally parse numbers and booleans.
All processing happens directly in your browser - your data never leaves your device, ensuring complete privacy and security.
Features
Auto-detect Delimiter
Automatically identifies whether your CSV uses commas, semicolons, tabs, or pipes.
Type Parsing
Optionally convert numbers, booleans, and null values to their proper JSON types.
Flexible Output
Output as an array of objects or as a keyed object using the first column as keys.
Quoted Value Handling
Properly handles values with embedded commas, quotes, and newlines.
Header Row Options
Use first row as headers or auto-generate column names (col1, col2, etc.).
Instant Download
Download your converted JSON file with one click, ready to use anywhere.
Common Use Cases
API Integration: Convert spreadsheet exports to JSON for REST API consumption.
Data Import: Transform CSV database exports to JSON for web applications.
Configuration Files: Convert spreadsheet configurations to JSON format.
Testing: Generate JSON test data from CSV test cases.
Migration: Convert legacy CSV data to modern JSON format.
Frequently Asked Questions
What delimiters are supported?
The converter supports comma (,), semicolon (;), tab, and pipe (|) delimiters. Auto-detection analyzes the first row to determine which delimiter is used most frequently.
How are quoted values handled?
Values enclosed in double quotes are properly parsed, including those containing commas or the delimiter character. Escaped quotes (two consecutive quotes) within values are correctly handled.
What does "Parse numbers & booleans" do?
When enabled, numeric strings are converted to JSON numbers, "true"/"false" become JSON booleans, and empty values become null. When disabled, all values remain as strings.
Is my data secure?
Yes, absolutely. All conversion happens in your browser using JavaScript. Your CSV data never leaves your device and is not sent to any server.