What if my CSV has no header?

You can toggle "use header row" off; the tool will generate numeric keys (`0`, `1`, ...).

Are numbers parsed automatically?

Yes. Numeric strings become JSON numbers, and `true`/`false` become booleans unless you disable type inference.

CSV to JSON

Convert CSV data into a JSON array of objects using the header row as keys. Auto-detects delimiters and handles quoted fields.

Runs locally in your browser

For large CSVs, open fullscreen for a wider view

CSV input

0 chars · 1 line

JSON output

Output will appear here…

Delimiter

Indent

First row is headerInfer numbers, booleans, and null

JSON to CSV

Flatten JSON arrays into CSV rows.

JSON Formatter

Beautify and format JSON with configurable indentation.

YAML to JSON

Convert YAML config into strict JSON.

About CSV to JSON

Convert CSV data into a JSON array of objects using the header row as keys. Auto-detects delimiters and handles quoted fields.

CSV to JSON is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.

Frequently asked questions

Yes, it chooses between comma, semicolon, and tab based on the input.

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