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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.

Summary

JSON to CSV Converter is a free 開発者 utility by Zerethon Tools. Convert a JSON array of objects to CSV. Optional dot-path flatten for nested data. Runs entirely in the browser — no signup, no upload.

Category
開発者
Pricing
Free
Privacy
Browser-based
Signup
Not required

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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