Is the CSV ↔ JSON converter free?

Yes, completely free. No account, no file size limits.

Is my data sent to a server?

No. Conversion runs entirely in your browser — your CSV or JSON data never leaves your device.

Does it support custom delimiters?

Yes. Comma, semicolon, tab and pipe delimiters are supported. The tool auto-detects the delimiter in most cases.

What JSON output formats are available?

Array of objects (one object per row with header keys), array of arrays, or a single object keyed by the first column.

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CSV ↔ JSON Converter

Convert CSV to JSON and JSON to CSV instantly in your browser. 100% local — no data leaves your device.

Delimiter

First row is header

CSV Input

JSON Output

This looks like JSON — switch to ?

JSON Input

CSV Output

This looks like CSV — switch to ?

How it works

Paste your data Choose the direction — CSV to JSON, or JSON to CSV — then paste your content into the input field.

Configure options For CSV input, select the delimiter (comma, semicolon, or tab) and whether the first row contains column headers.

Convert & export Click Convert to get instant results. Copy to clipboard or download the output file. All processing is done locally in your browser.

CSV ↔ JSON Converter

How it works

Frequently Asked Questions