JSON to CSV – Complete Guide & Free Online Tool

A JSON to CSV converter turns an array of objects into a comma-separated table, using the union of all keys as columns. Free online tool included.

Published 2026-09-13

In this guide
  1. What is JSON to CSV?
  2. How the conversion works
  3. Key Features
  4. Examples
  5. Common Use Cases
  6. Tips & Best Practices
  7. Limitations
  8. Related Tools
  9. External Resources

What is JSON to CSV?

A JSON to CSV converter turns an array of objects into a comma-separated table, using the union of all keys as columns.

How the conversion works

The tool takes an array of objects, collects the union of all keys as columns, and writes one row per object. Nested objects are JSON-stringified into a single cell.

Key Features

• Union of keys as columns • Proper escaping • Download as CSV

Examples

• An array of user objects becomes a spreadsheet-friendly table.

Common Use Cases

• Analyzing API data • Spreadsheet exports • Reporting

Tips & Best Practices

• Ensure your JSON is an array of objects • not a single object.

Limitations

• Nested structures are flattened into JSON strings.

Related Tools

Explore other developer tools: [Developer Tools](/categories/developer).

Related tools: [json-formatter](/tools/json-formatter), [json-validator](/tools/json-validator), [text-sorter](/tools/text-sorter).

External Resources

RFC 4180: CSV

Related Tools

JSON Formatter Format, validate and beautify JSON with configurable indentation. Developer Use Tool →
JSON Validator Check whether your JSON is valid and inspect its structure. Developer Use Tool →
Text Sorter Sort lines alphabetically or numerically, in ascending or descending order. Text Use Tool →

Frequently Asked Questions

More Guides

Word Counter – Complete Guide & Free Online Tool A word counter counts the number of words in a text instantly. It also shows characters (with and without spaces), sentences, paragraphs, and an estimated reading time, all processed locally in your browser. Free online tool included. Read → Character Counter – Complete Guide & Free Online Tool A character counter reports how many characters your text contains, both with and without spaces. It also shows the word count, which is useful for social media, meta descriptions and forms with length limits. Free online tool included. Read → Sentence Counter – Complete Guide & Free Online Tool A sentence counter counts how many sentences your text contains and the total words, then works out the average words per sentence — a useful readability signal. Free online tool included. Read → Reading Time Calculator – Complete Guide & Free Online Tool A reading time calculator estimates how long it takes to read your text by dividing the word count by a reading speed, typically 200–250 words per minute. It is widely used to display "X min read" on blogs. Free online tool included. Read →