All tools CSV to JSON Converter ● Live Data Tools

How CSV to JSON Converter works

  1. Paste your CSV data into the input box, or upload a .csv file.
  2. Confirm or override the auto-detected delimiter (comma, semicolon, or tab).
  3. Toggle whether the first row should be used as object keys.
  4. Optionally enable whitespace trimming for cell values.
  5. Review the pretty-printed JSON output, then copy it or download as .json.
  • Convert a CSV export from a spreadsheet into JSON for use in an API or app.
  • Turn CSV data from a database export into JSON test fixtures.
  • Parse CSV reports from analytics tools into JSON for further processing.
  • Convert semicolon-delimited CSV (common in European locales) to standard JSON.
  • Quickly inspect CSV data as structured JSON during development or debugging.

Parsing happens entirely in your browser. Your CSV data is never uploaded to a server.

  • Delimiter auto-detection may need manual correction for unusual or mixed-delimiter files.
  • All values are parsed as strings — there's no automatic number or boolean type conversion.
  • Very large CSV files may be slow to process since parsing happens in the browser.

CSV to JSON Converter

CSV to JSON Converter parses CSV input into a pretty-printed JSON array. The delimiter is auto-detected from the first line, or you can specify it manually. Options include using the first row as object keys, trimming whitespace, and downloading the result as a .json file.

CSV to JSON Converter Runs locally

Options

CSV input

JSON output (2 rows)

Guide

How to use

  1. Paste your CSV data into the input box, or upload a .csv file.

  2. Confirm or override the auto-detected delimiter (comma, semicolon, or tab).

  3. Toggle whether the first row should be used as object keys.

  4. Optionally enable whitespace trimming for cell values.

  5. Review the pretty-printed JSON output, then copy it or download as .json.

Scenarios

Use cases

  • Convert a CSV export from a spreadsheet into JSON for use in an API or app.

  • Turn CSV data from a database export into JSON test fixtures.

  • Parse CSV reports from analytics tools into JSON for further processing.

  • Convert semicolon-delimited CSV (common in European locales) to standard JSON.

  • Quickly inspect CSV data as structured JSON during development or debugging.

Good to know

Limitations & Privacy

Private by design

Parsing happens entirely in your browser. Your CSV data is never uploaded to a server.

  • Delimiter auto-detection may need manual correction for unusual or mixed-delimiter files.

  • All values are parsed as strings — there's no automatic number or boolean type conversion.

  • Very large CSV files may be slow to process since parsing happens in the browser.

FAQ

Frequently asked questions

What happens if rows have different numbers of columns?

Rows with fewer columns than the header will have empty strings for the missing fields, and rows with extra columns will have those extra values ignored.

Does it handle quoted CSV fields?

Yes. The parser handles double-quoted fields, which may contain the delimiter character, newlines, or escaped quotes — standard RFC 4180 quoting is supported.

How is the delimiter detected?

The tool inspects the first line of your CSV and checks for commas, semicolons, and tabs to guess the delimiter. You can override the detected delimiter manually if it's wrong.

What if my CSV doesn't have a header row?

Turn off the 'first row as keys' option, and the tool will generate generic numeric keys (like "0", "1", "2") for each column instead.

Does it trim extra whitespace from values?

There's a toggle to trim leading/trailing whitespace from each cell, useful for CSV exports that pad values with spaces.

Can it handle large CSV files?

Reasonably large files (thousands of rows) work fine, but very large files may be slow since parsing happens entirely in your browser.

What output format do I get?

A pretty-printed JSON array of objects, which you can copy directly or download as a .json file.