Does this handle a CSV field that contains a comma?

Yes — a properly quoted field (e.g. "Doe, John") is parsed as one value, per the RFC 4180 CSV standard, not split apart.

What happens to a row with fewer cells than the header?

The missing trailing columns are filled in as empty strings rather than dropped, so every object has every header key.

Does the tool guess data types like numbers or booleans?

No — every value stays a string exactly as written in the CSV, so a numeric-looking cell like "36" becomes the JSON string "36", not the number 36.

Is my CSV data uploaded anywhere?

No — the conversion runs entirely in your browser; nothing is uploaded to a server.

Can I convert JSON back to CSV?

Yes — see the file converter tool, which includes a JSON → CSV mode using the same underlying parser.

What if my CSV uses a semicolon instead of a comma?

This converter expects comma-separated values per the CSV standard; a semicolon-delimited file would need its delimiters replaced first.

Free tool

CSV to JSON converter

Paste or upload a CSV file and get back a real, deterministic JSON array of objects, one per row, keyed by the header row — built on a real RFC 4180-aware parser that correctly handles quoted fields containing commas, quotes or line breaks, not a naive comma-split that breaks on real-world data. Every value stays a string exactly as the source CSV held it; nothing is type-guessed or coerced.

CSV inputUpload a .csv file

Pretty-print (2-space indent)

JSON output

[
  {
    "name": "Ada",
    "platform": "Instagram",
    "followers": "12400"
  },
  {
    "name": "Grace",
    "platform": "LinkedIn",
    "followers": "8300"
  },
  {
    "name": "Doe, John",
    "platform": "X",
    "followers": "2100"
  }
]

3 rows × 3 columns converted.

How to convert CSV to JSON

Paste or upload your CSV. Paste CSV text directly into the input box, or click "Upload a .csv file" to load one from disk.
Check the first row is your headers. The first row becomes each object's keys — make sure it contains real column names, not data.
Choose pretty-print or compact. Toggle "Pretty-print" for readable, indented JSON, or leave it off for a compact single-line output.
Copy or download the result. Use the Copy button for the clipboard, or Download to save a .json file.

Worked examples

A 3-column, 2-row CSV

"name,platform,followers\nAda,Instagram,12400\nGrace,LinkedIn,8300" converts into a real JSON array of 2 objects, each with the keys name, platform and followers.

A quoted field with a comma inside it

A cell like "Doe, John" (containing a comma) is correctly kept as one field rather than split into two — this is exactly what a naive `split(",")` parser gets wrong.

CSV to JSON FAQ

Does this handle a CSV field that contains a comma?: Yes — a properly quoted field (e.g. "Doe, John") is parsed as one value, per the RFC 4180 CSV standard, not split apart.
What happens to a row with fewer cells than the header?: The missing trailing columns are filled in as empty strings rather than dropped, so every object has every header key.
Does the tool guess data types like numbers or booleans?: No — every value stays a string exactly as written in the CSV, so a numeric-looking cell like "36" becomes the JSON string "36", not the number 36.
Is my CSV data uploaded anywhere?: No — the conversion runs entirely in your browser; nothing is uploaded to a server.
Can I convert JSON back to CSV?: Yes — see the file converter tool, which includes a JSON → CSV mode using the same underlying parser.
What if my CSV uses a semicolon instead of a comma?: This converter expects comma-separated values per the CSV standard; a semicolon-delimited file would need its delimiters replaced first.

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