BYTETOOLS

CSV to JSON Converter

Convert CSV to a JSON array of objects online. Header-row detection, comma/semicolon/tab delimiters and pretty-printed output — 100% in your browser.

Drop a .csv file here or click to browse

What is the CSV to JSON Converter?

The ByteTools CSV to JSON Converter turns spreadsheet-style CSV data into a clean, pretty-printed JSON array of objects.

  • Header-row detection maps columns to object keys
  • Comma, semicolon and tab delimiter support
  • Handles quoted fields, embedded commas and newlines
  • Pretty-printed, indented JSON output
  • 100% private — CSV never leaves your browser
  • Copy to clipboard or download as .json

How to use the CSV to JSON Converter

  1. 1

    Paste your CSV into the input box, or drop a .csv file to load it.

  2. 2

    Pick the delimiter — comma, semicolon or tab.

  3. 3

    Tick 'First row is a header' if your file starts with column names.

  4. 4

    Click Convert to JSON to generate a pretty-printed array of objects.

  5. 5

    Copy the result or download it as a .json file.

About the CSV to JSON Converter

The ByteTools CSV to JSON Converter turns spreadsheet-style CSV data into a clean, pretty-printed JSON array of objects. Paste your rows or drop a .csv file, choose the delimiter and whether the first row is a header, and get valid JSON you can copy or download in one click.

Everything runs locally in your browser with JavaScript — your CSV is never uploaded to a server. That makes it safe for exports containing customer records, financial figures or any confidential data you would rather not send anywhere.

It is built for developers seeding APIs and databases, analysts moving data between tools, and anyone who needs machine-readable JSON from a spreadsheet. The parser correctly handles quoted fields, commas and line breaks inside quotes, and escaped double quotes.

Frequently asked questions

How do I convert CSV to a JSON array of objects?

Paste your CSV, keep 'First row is a header' checked, and click Convert. Each remaining row becomes an object whose keys are the header names and whose values are that row's cells. The result is a JSON array you can copy or download.

What happens if my CSV has commas inside a field?

Fields wrapped in double quotes can safely contain commas, line breaks and escaped quotes. The parser follows the standard CSV rules, so a value like "Smith, John" is read as a single field rather than being split into two columns.

Can I convert CSV without a header row?

Yes. Untick 'First row is a header' and the tool outputs a JSON array of arrays instead of objects, preserving every row exactly as it appears including the first one. This is useful for positional data that has no column names.

Does my CSV get uploaded anywhere?

No. The conversion happens entirely in your browser using JavaScript, so nothing is transmitted, logged or stored. You can safely convert exports that contain private or sensitive information.

What delimiter should I choose for European CSV files?

Many European spreadsheets use a semicolon because the comma is a decimal separator. If your columns look merged into one, switch the delimiter to semicolon and convert again.

Guides for CSV to JSON Converter

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