CSV to JSON Converter

Turn CSV into clean JSON — auto-detected delimiter, header row as keys, numbers and booleans typed for you.

Stays on your device. This tool runs in your browser — nothing you paste or open ever leaves it. Nothing uploaded, nothing to leak.

CSV

JSON

Run the tool first — there’s no result to send yet.

How to convert CSV to JSON

Paste your CSV (or the contents of a .csv file). The JSON appears instantly as an array of objects, one per row, with the header row used as the keys. Leave the delimiter on Auto and TechWhack works out whether it is comma, semicolon or tab separated, or pick one yourself. Copy the result or download the .json file.

CSV to JSON — TechWhack Score

9.8/10

Privacy 10/10

Your CSV is parsed in the browser — nothing is uploaded.
Speed 10/10

Returns the JSON the instant you paste.
Features 9/10

Auto-detects the delimiter, turns the header row into keys, infers types with a leading-zero guard (so a zip code stays a string), and parses quoted commas correctly.
Free 10/10

No sign-up, no file-size cap, embeddable.

Verdict: Smart enough to keep a leading-zero zip code as text and handle quoted commas — the bits that trip up most CSV parsers.

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A CSV to JSON converter turns spreadsheet rows into an array of JSON objects. TechWhack auto-detects whether your file is comma, semicolon or tab separated, uses the header row as the keys, and can infer real numbers and booleans instead of leaving everything as strings. It handles quoted fields and commas inside quotes correctly, and runs entirely in your browser, so your data is never uploaded.

Headers, types and quoted fields

With "First row is headers" on, each column header becomes a JSON key; turn it off to get plain arrays instead. "Infer types" converts 42 and true into a real number and boolean rather than text, while leaving things like leading-zero IDs as strings so they are not mangled. Quoted fields and commas inside quotes are parsed correctly, not split by accident.

FAQ

Does it automatically detect the delimiter in my CSV?Yes. It auto-detects whether your file uses commas, semicolons, or tabs, so you usually do not have to configure anything. The header row becomes the keys for each JSON object.

Will it turn my zip codes or IDs with leading zeros into numbers?No. It infers types but includes a leading-zero guard, so a value like 01234 stays a string instead of becoming 1234. That protects zip codes, product codes, and phone numbers from losing their leading zeros.

How does it handle commas inside quoted fields?Quoted values are parsed correctly, so a field like "Smith, John" stays one value instead of splitting into two. This follows standard CSV quoting rules so addresses and names survive intact.

What is the difference between this and a JSON-to-CSV converter?This turns flat tabular rows into an array of JSON objects keyed by your headers, which is what APIs and code expect. A JSON-to-CSV tool does the reverse, flattening objects back into spreadsheet rows.