Convert CSV Data to JSON
Paste CSV text or upload a .csv file and this tool converts it into a JSON array: each row becomes an object whose keys are taken from the header row. The delimiter — comma, semicolon, tab or pipe — is detected automatically, and quoted fields with commas or line breaks inside are handled correctly.
Numbers, true/false and null are converted to real JSON values, while codes with leading zeros such as 007 stay text. Everything runs in your browser, so your data is never uploaded.
Why Use This CSV to JSON Converter?
- Automatic delimiter detection: comma, semicolon, tab or pipe
- Quoted fields, escaped quotes and multi-line values handled correctly
- Numbers and booleans become real JSON values
- Works in your browser — no upload, no sign-up
How to Convert CSV to JSON
- Paste your CSV into the left editor, or load a file from your computer or a URL
- Click "Convert"
- Copy the JSON or download it as a file
Frequently Asked Questions
Is this CSV to JSON converter free?
Yes, it is completely free and has no limits on the number of conversions.
Does it work with semicolon-separated files?
Yes. The delimiter is detected from the first lines — commas, semicolons (common in European Excel exports), tabs and pipes are all recognised.
Are numbers kept as numbers?
Yes. Values like 42 or 3.14 become JSON numbers, and true, false and null become their JSON equivalents. Values with leading zeros, such as postcodes or phone numbers, stay text so nothing is lost.
Is my data uploaded anywhere?
No. The conversion runs entirely in your browser; your CSV never leaves your device.