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JSON to CSV Converter — Free Browser-Based, Flatten Nested JSON

Convert a JSON array of objects to CSV. Optional dot-path flatten for nested data.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Paste a JSON array of objects.
  2. 2 Optionally turn on "Flatten" to expand nested objects into dot-path columns.
  3. 3 Copy or download the CSV.

Why use this tool

  • Handles missing keys — fills with empty cells.
  • Optional dot-path flattening turns {"a":{"b":1}} into column "a.b".
  • Auto-quotes fields with commas, newlines, or quotes per RFC 4180.
  • Pure client-side, your data stays private.

Frequently asked questions

What if my JSON is a single object, not an array?

The tool needs an array of objects (one per row). Wrap a single object in `[ ... ]` to convert it to a single-row CSV.

How does the flatten option handle arrays?

Arrays get numeric index paths — `tags[0]`, `tags[1]`. If you have lots of array-valued fields, consider preprocessing instead.

Can I get tab-separated output for Excel?

Yes — pick Tab as the delimiter. Excel pastes TSV directly into cells.

What is JSON to CSV Converter?

A JSON to CSV Converter is a tool that transforms a JSON array of objects into CSV. It maps object keys to columns and values to rows, and offers an optional dot-path flatten so nested data is expanded into individual columns. It runs entirely in the browser, converting the data locally on the device without uploading it to a server.

Features

Objects to rows

Union of all object keys becomes the header; each object becomes one CSV row.

Flatten nested JSON

Optionally expand nested objects into dot-path columns (e.g. address.city).

100% private

Runs client-side — your JSON is never sent to a server.

Example

Input

[{"name":"Ann","age":30},{"name":"Bob","age":25}]

Output

name,age
Ann,30
Bob,25

Common use cases

  1. 1

    Open API data in a spreadsheet

    Convert a JSON response into CSV you can import into Excel or Google Sheets.

  2. 2

    Share data with non-developers

    Hand off structured data as a familiar table instead of raw JSON.

  3. 3

    Bulk-import into other tools

    Produce a CSV that CRMs, databases, and BI tools accept out of the box.

Summary

Zerethon's JSON to CSV converter turns a JSON array of objects into CSV in your browser, mapping keys to a header row and each object to a data row. An optional dot-path flatten expands nested objects into individual columns. Output follows RFC 4180 quoting, and nothing is uploaded.

Category
Developer
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. JSON to CSV Converter runs entirely client-side — no server upload, no logging, no tracking of your input.

Compare

CSV vs JSON

Learn the basics

What is JSON? What is CSV?

How-to guides

How to convert csv to json

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