Convert CSV to JSON

Paste CSV data or open a file and get JSON instantly. Free, no sign-up — and your data never leaves your device.

Input Open file

Output

Settings

Input separatorFirst row contains column namesDetect numbers and true/falseOtherwise every value stays textOutput separatorUse semicolon for Excel in many European countriesExcel-friendly encoding (UTF-8 BOM)Keeps letters like ą, é, ü correct when the CSV is opened in ExcelIndentationXML element namesUsed when the data has no names of its own

How to convert CSV to JSON

Paste your CSV into the Input box, click Open file, or drag a file onto it.
Check the output format (JSON) and adjust Settings if needed — separator, column names, indentation.
Click Copy or Download.

About CSV and JSON

CSV is a plain-text table where values are separated by commas (or semicolons). Every spreadsheet and database can import it.

JSON is the standard data format of web APIs and JavaScript apps. It can hold nested objects and lists.

Frequently asked questions

How do I convert CSV to JSON?

Paste your CSV data into the Input box or open a file. The JSON result appears instantly on the right — copy it or click Download.

Is my data uploaded anywhere?

No. FileCrafty converts the data inside your browser, so customer lists, exports and API keys never leave your device. It also works offline once the page is open.

What happens to the first row?

By default the first row is used as column names, so each row becomes an object with those keys. Turn off “First row contains column names” to get plain arrays instead.

My CSV uses semicolons. Does that work?

Yes. The separator — comma, semicolon, tab or pipe — is detected automatically, and you can also choose it in Settings. Quoted values with commas or line breaks are handled correctly.

Is there a size limit?

There is no fixed limit — files of tens of megabytes work fine on a computer. Very large files are not shown in the text box, but they are still converted in full.

Is it free?

Yes — free, unlimited and without sign-up.

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