CSV to JSON Converter
Turn CSV data from Excel, Google Sheets or any export into a clean JSON array. The header row becomes the keys, and quotes, commas and line breaks inside cells are handled correctly.
Runs in your browser — your code is never uploaded. Tip: drop a file on the input box, or press Ctrl + Enter.
How to Convert CSV to JSON
Spreadsheet data to JSON in three steps.
Paste or Upload CSV
Paste CSV, upload a .csv file, or drop it in the box. The separator is detected automatically.
Choose the Output
Use the first row as keys, pick objects or arrays, and convert numbers and true/false.
Copy or Download
Copy the JSON or download data.json.
Separator
Auto-detected
Handles
Quotes & line breaks
Types
Numbers & booleans
Privacy
Runs in your browser
Works on
Phone & computer
Price
100% free
CSV to JSON Example
How rows and values are converted.
| CSV | JSON |
|---|---|
id,name1,Asha | [{"id": 1, "name": "Asha"}] |
"O'Brien, Liam" | "O'Brien, Liam" (comma inside quotes kept) |
true / false | true / false (with Convert on) |
00123 | "00123" — leading zeros kept as text |
| Empty header cell | Named column_3 automatically |
Duplicate header name,name | name and name_2 |
What Can You Use It For?
Popular ways people use CSV to JSON Converter.
Web & App Data
Load spreadsheet data into JavaScript, React or Vue apps.
APIs & Imports
Prepare JSON bodies for API calls and bulk imports.
NoSQL Databases
Import into MongoDB, Firebase or Elasticsearch.
Testing
Turn test data sheets into JSON fixtures.
Tips for the Best Result
- Leading zeros (like zip codes and phone numbers) are kept as text so no data is lost.
- If everything ends up in one key, choose the separator by hand — some European files use semicolons.
- Copied cells from Google Sheets are tab-separated — Auto-detect handles that too, or use TSV to JSON.
- Have an .xlsx file? Convert it with Excel to CSV first.
Frequently Asked Questions
Quick answers about CSV to JSON Converter.
Paste the CSV or upload a .csv file. The JSON appears instantly — copy it or download data.json.
Yes, when First row is header is ticked. Untick it to get an array of arrays with every row.
Comma, semicolon, tab and pipe. Auto-detect picks the right one for most files.
Yes. The parser follows the CSV standard (RFC 4180): quotes, commas and line breaks inside quoted cells are kept correctly.
With Convert numbers & true/false on, plain numbers become JSON numbers. Values with leading zeros stay text.
Save or convert it to CSV first with our Excel to CSV tool, then paste it here.
No. Everything runs in your web browser, so your code and data never leave your device.
Yes — 100% free, with no sign-up and no limits.
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