๐โ๐ CSV to JSON
Convert CSV to JSON free online. Handles quoted fields, custom delimiters and headers. No upload, runs in your browser.
๐โ๐ CSV to JSON
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About the CSV to JSON Tool
CSV is how data leaves spreadsheets and databases; JSON is how it enters applications and APIs. That gap is crossed constantly, and doing it by hand for anything beyond a handful of rows is both tedious and error-prone โ particularly once fields contain commas, quotes, or line breaks inside them.
This converter parses your CSV properly, respecting quoted fields and escape sequences, and emits a clean JSON array of objects using your header row as keys. Everything runs in your browser, which matters when the data is a customer export or anything else you should not be pasting into a remote service.
How to Use CSV to JSON
- Paste your CSV data, including the header row, into the input area.
- Confirm the delimiter if your file uses something other than a comma.
- Press Convert to generate the JSON output.
- Copy the formatted JSON or download it as a file.
When to Use This Tool
- Preparing spreadsheet data for import into a web application or API
- Converting a database export into a format your frontend can consume
- Turning a CSV into seed data for a development database
- Building JSON fixtures for automated tests from a spreadsheet
- Feeding exported analytics data into a JavaScript charting library
Things Worth Knowing
- The first row is treated as the header and becomes the object keys.
- All values are produced as strings unless numeric detection is enabled โ JSON distinguishes types where CSV does not.
- Fields containing commas must be quoted in the source CSV, which is standard practice.
Quick Facts
| Tool name | CSV to JSON |
| Category | Data Converters |
| Price | Free โ no account, no trial, no watermark |
| Where it runs | Entirely in your browser (client-side) |
| Files uploaded | None โ your data never leaves your device |
| File size limit | None imposed; limited only by device memory |
| Works offline | Yes, once the page has loaded |
| Platforms | Windows, macOS, Linux, Android, iOS |
Frequently Asked Questions
How are quoted fields with commas handled?
Correctly. The parser follows standard CSV quoting rules, so a field wrapped in double quotes can contain commas, newlines, and escaped quotes without breaking the row.
Why are my numbers appearing as strings?
CSV has no type information โ every value is text. Enable numeric detection if available, or cast the values in your application after parsing.
What if my file has no header row?
Add one before converting, or the first data row will be consumed as the key names. Generic names like col1, col2 work fine if you have nothing better.
Is my data uploaded?
No. Parsing and conversion both run in your browser, so business or customer data never leaves your device.