Will my numbers stay as numbers after converting to CSV and back?

No — CSV has no number type, so every value becomes text. If you need real numbers back, you'd need to parse those specific fields back to numbers yourself after converting from CSV to JSON.

What happens to nested objects or arrays in my JSON?

They're stored as a JSON-stringified value inside a single CSV cell, since a flat CSV cell can't hold a nested structure directly. Converting that CSV back to JSON gives you that string back, not automatically re-parsed into an object.

What if my JSON objects don't all have the same fields?

The CSV header includes every key found across every object, in first-seen order, with a blank cell for any row that doesn't have a particular key — no data is silently dropped.

Does this handle CSV fields with commas or line breaks inside them?

Yes — as long as they're properly quoted with double quotes, which is the standard CSV convention this tool both produces and expects when parsing.

JSON ↔ CSV Converter

Convert JSON to CSV or CSV to JSON, with proper comma and quote escaping in both directions.

TL;DR: JSON ↔ CSV Converter is a free, browser-based tool that lets you convert JSON to CSV or CSV to JSON, with proper comma and quote escaping in both directions.

Paste JSON (an array of objects, or a single object)

About this tool

Convert JSON into CSV, or CSV into JSON, entirely in your browser. Both directions handle the details that a naive comma-split conversion gets wrong: values containing commas, quotes, or line breaks are properly quoted and escaped, and converting back from CSV correctly un-escapes them. JSON to CSV also handles objects with different sets of keys by taking the union of every key across all rows, so no data silently gets dropped just because one row has an extra field.

Key Features

Converts a JSON array of objects to CSV, or a CSV file back to JSON
Correctly escapes and un-escapes commas, quotes, and line breaks within values
Handles JSON objects with inconsistent keys by taking the union across all rows
Handles multi-line quoted CSV fields correctly, not just simple comma-split parsing
Runs entirely in your browser — your data is never uploaded

How to Use

Choose JSON → CSV or CSV → JSON.
Paste your data.
Click Convert.
Copy or download the result.

When to use it

Turning an API's JSON response into a CSV file to open in a spreadsheet
Converting a CSV export from a spreadsheet or database into JSON for use in code
Preparing JSON test data as a CSV a non-technical teammate can review in a spreadsheet
Quickly checking whether a CSV file is well-formed by round-tripping it through JSON and back
Migrating data between a tool that only exports CSV and one that only accepts JSON

Tips & limitations

CSV has no native type system — converting to CSV and back always turns numbers and booleans into text strings, since that's simply how CSV represents data, not a limitation specific to this tool
A JSON value that's itself an object or array (nested data) gets stored in its CSV cell as a JSON string, since CSV cells can only hold flat text — converting that CSV back to JSON will give you the nested value back as a JSON-formatted string inside that field, not automatically re-parsed
When JSON objects have different keys from row to row, every column from every row appears in the CSV header, with blank cells for rows missing that particular key
A CSV field containing a comma, quote, or line break needs to be wrapper-quoted ("like this") to parse correctly — this tool produces and expects that standard CSV quoting convention

What round-trips cleanly, and what doesn’t

Converting JSON → CSV → JSON
JSON value	Survives the round trip?
String, e.g. `"Alice"`	Yes, exactly
Number, e.g. `42`	Becomes the string `"42"` — CSV has no number type
Boolean, e.g. `true`	Becomes the string `"true"`
Nested object or array	Becomes a JSON-stringified value inside one CSV cell

This is standard, expected CSV behavior — CSV (comma-separated values) is a flat, text-only format with no concept of data types or nesting, unlike JSON.

Frequently Asked Questions

: No — CSV has no number type, so every value becomes text. If you need real numbers back, you'd need to parse those specific fields back to numbers yourself after converting from CSV to JSON.
: They're stored as a JSON-stringified value inside a single CSV cell, since a flat CSV cell can't hold a nested structure directly. Converting that CSV back to JSON gives you that string back, not automatically re-parsed into an object.
: The CSV header includes every key found across every object, in first-seen order, with a blank cell for any row that doesn't have a particular key — no data is silently dropped.
: Yes — as long as they're properly quoted with double quotes, which is the standard CSV convention this tool both produces and expects when parsing.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). JSON ↔ CSV Converter [Software]. https://nexlove.org/tools/json-csv-converter.html

“JSON ↔ CSV Converter.” NexLove.org, 2026, nexlove.org/tools/json-csv-converter.html.

NexLove.org (2026) JSON ↔ CSV Converter. Available at: https://nexlove.org/tools/json-csv-converter.html (Accessed: 2026).

@misc{nexlove_json_csv_converter,
  title = {JSON ↔ CSV Converter},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/json-csv-converter.html}
}

Embed This Tool

Add the live JSON ↔ CSV Converter tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/json-csv-converter.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="JSON ↔ CSV Converter — NexLove.org" loading="lazy"></iframe>

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