Text utilities

CSV to JSON Converter

Convert comma-separated text with a header row into an array of JSON objects.

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Data workspace
Data workspace

Check delimiters and structure before downloading the output.

See the method

Your source data

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Your transformed data

Your result

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Use the Calculate button to see your result.

Your content is processed locally.

How to use this tool

  1. Enter csv with column headers.
  2. Select Update result to view the result.
  3. Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

InputFormat and unitsSample
CSV with column headersKeep the structure and separators shown in the sample. Line breaks are retained in this input.name,score Alex,95 Sam,88

Result for these sample inputs

[
  {
    "name": "Alex",
    "score": "95"
  },
  {
    "name": "Sam",
    "score": "88"
  }
]
Data rows
2
Columns
2

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

Read quoted fields, escaped double quotes and line endings. Use unique column headers as object keys and preserve every cell as a string.

A WORKED EXAMPLE

name,score followed by Alex,95 becomes an object with name "Alex" and score "95" inside a JSON array.

What to keep in mind

Comma delimiter only; headers must be nonempty and unique. Every data row must match the header width. Up to 100,000 input characters. Numbers remain strings to preserve leading zeroes.

Reference: RFC 4180: comma-separated values

Common questions

Can a cell contain a comma or line break?

Yes, if the cell is surrounded by double quotes. A double quote inside such a cell must be doubled.

Will 00123 become 123?

No. All cell values stay strings, preserving identifiers and leading zeroes.

Methodology maintained by ClarityKit. How these tools are built and checked.