CSV to JSON Converter is a 100% free, browser-based utility that enables you to convert csv or tsv data to a json array. Unlike traditional cloud converters, all processing executes locally on your device with zero server uploads, delivering immediate results and ironclad data privacy.
About the CSV to JSON Converter
Turn spreadsheet data into JSON in one step. Paste CSV exported from Excel or Google Sheets, or upload a .csv file, and get an array of objects keyed by the header row, or an array of arrays if your data has no header.
The parser follows the CSV standard: fields wrapped in double quotes may contain commas, line breaks and escaped quotes (""). The delimiter is detected automatically, and numbers, booleans and empty values can be converted to their proper JSON types.
How to use the CSV to JSON Converter
- Paste CSV text or drop a .csv file.
- Keep "Auto-detect" or choose the delimiter, and set whether the first row is a header.
- Copy the JSON output or download it as a .json file.
Features
- Auto-detects delimiter
- Quoted fields & line breaks
- Header row or arrays
- Typed numbers & booleans
Why Choose In-Browser CSV to JSON Converter vs Cloud Converters?
| Feature | Toolora (In-Browser) | Traditional Cloud Tools |
|---|---|---|
| Data Privacy | 100% Private (Files stay on device) | Uploaded to remote servers |
| File Size Limits | Unlimited (Limited only by your RAM) | Restricted (e.g. 10MB–50MB caps) |
| Processing Speed | Instant (Zero upload/download delay) | Slow upload & queue waiting |
| Ads & Popups | Clean, distraction-free | Heavy banner & interstitial ads |
Frequently asked questions
Does it support semicolon and tab separated files?
Yes. Auto-detect checks commas, semicolons, tabs and pipes, or you can choose one manually.
What does "Convert numbers & booleans" do?
Values like 42, 3.14, true and false become JSON numbers and booleans instead of strings. Leave it off to keep everything as text, for example to preserve leading zeros in ZIP codes.
What happens to duplicate column names?
Duplicate headers get a numeric suffix (name, name_2) so no column is overwritten.