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Move structured data

CSV and JSON Converter

Paste structured data or load a text file, choose the conversion direction, and inspect the output before copying or downloading it.

Private by default

Processing stays in your browser. Your text is not sent anywhere by this tool.

Use the tool

Add your file or text below, adjust the options if needed, then download the result.

Loading the local processor…

You can add

CSV text, JSON array of objects, .csv, .json

You will get

CSV, JSON

How to use CSV and JSON Converter

  1. 1

    Add the source data

    Paste CSV or JSON, or select a matching text file.

  2. 2

    Choose the direction

    Convert CSV to JSON or JSON to CSV and resolve any validation message.

  3. 3

    Copy or download

    Review the formatted result, then copy it or save a new file.

When this tool is useful

  • Turn spreadsheet exports into records for a small script.
  • Prepare simple API response data for spreadsheet review.
  • Inspect quoted CSV values as structured JSON objects.

Browser and format limits

  • JSON-to-CSV works with a top-level array of simple objects.
  • Nested arrays and objects are represented as serialized cell values.
  • Very large datasets can make the browser preview slower.

Practical tips

TIP 1

Use a clear header row when converting CSV to JSON.

TIP 2

Keep object keys consistent across rows for cleaner CSV output.

TIP 3

Validate a small sample before converting a very large dataset.

CSV and JSON Converter questions

Does the CSV parser handle quoted commas?

Yes. Commas inside properly quoted fields remain part of the field value.

What JSON shape can become CSV?

Use a top-level array containing objects. Each object becomes a row and its keys become column headers.

How are nested JSON values handled?

Nested values are serialized into a cell rather than expanded into multiple columns.

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