CSV to JSON Converter
Convert CSV to JSON online. Paste comma-separated data and get clean JSON instantly — handles quoted fields, custom delimiters, and automatic type detection, all in your browser.
Features
📄 Handles Real-World CSV
- Quoted fields with embedded commas and quotes
- Multi-line values inside quoted cells
- Custom delimiters: comma, semicolon, tab, pipe
- Optional automatic number/boolean detection
⚡ Privacy-First
- All parsing happens in your browser
- No data ever sent to a server
- Works with spreadsheet exports (Excel, Sheets)
- Download or copy the resulting JSON instantly
🔄 Round-Trip Friendly
- Pairs with our JSON to CSV converter
- Header row becomes object keys automatically
- Toggle header mode off for raw row arrays
- Great for importing spreadsheet data into APIs
CSV to JSON Guide
CSV (Comma-Separated Values) is the most common export format from spreadsheets, databases, and analytics tools. Converting it to JSON is one of the most frequent tasks developers do when importing spreadsheet data into an API, database, or JavaScript application. This tool reads the first row as field names by default and turns every remaining row into a JSON object, but you can also disable the header option to get a plain array of arrays for irregular data.
Frequently Asked Questions
Does it handle commas inside quoted fields?
Yes. Fields wrapped in double quotes can contain commas, newlines, and escaped quotes (written as "") and are parsed correctly per the common CSV convention (RFC 4180).
What happens to numbers and booleans?
With "Infer types" enabled, values that look like integers, decimals, true/false, or null are converted to their JSON equivalents. Disable it to keep every value as a plain string, useful for IDs like "007" that shouldn't become numbers.
Can I use a delimiter other than a comma?
Yes — choose semicolon, tab, or pipe from the delimiter dropdown for TSV files or European-style CSV exports that use semicolons.