JSON to CSV Converter

Drop a JSON file below and get CSV back in seconds — converted on your own device, not uploaded anywhere.

Drop a file here or click to choose one — JSON

Processed entirely in your browser using a Web Worker. Nothing is uploaded.

What is JSON?

JSON (JavaScript Object Notation) is a plain-text format for structured data — objects, arrays, strings, numbers, booleans and null, nested as deeply as needed. It's the standard format for web APIs and configuration files, and every modern programming language can parse it natively.

What is CSV?

CSV (Comma-Separated Values) is a plain-text table format — one line per row, fields separated by commas. It's the closest thing to a universal format for spreadsheets and simple databases: nearly every spreadsheet app, database and programming language can read it, but it can only represent flat tables, not nested structures.

How it works

  1. Drop your JSON file into the box above, or click to choose one.
  2. Your browser parses it and rewrites it as CSV instantly — nothing is sent anywhere.
  3. Download the CSV file. That's it.

Other conversions

CSV to JSON

feeding spreadsheet data into an API, script or database that expects JSON

JSON to YAML

turning API output or a data export into a more human-editable config file

YAML to JSON

feeding a YAML config file into a tool or script that only reads JSON

CSV to YAML

turning a spreadsheet export into a human-editable YAML config file

YAML to CSV

opening a YAML config file's data in a spreadsheet

Questions.

Is my file uploaded to a server?

No. The conversion runs entirely in your browser — your JSON file never leaves your device.

Does anything get lost converting to CSV?

Only if your JSON isn't a flat list of objects — CSV can't represent nested objects or arrays inside a field, so those get flattened to their JSON text rather than expanded into columns. A simple array of flat objects converts cleanly.

Is there a file size limit?

No limit is enforced by the tool itself — the practical ceiling is your browser's available memory, which handles typical data files easily.

Is this really free?

Yes — every format conversion on ByteRivet is free, with no account or daily limit.

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