Free JSON to CSV Converter

Flatten an array of objects into spreadsheet-ready CSV — column order follows first appearance.

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Runs entirely in your browser — paste text and watch the results update instantly. Nothing is uploaded.

100% Client-Side — Your text stays in your browser. Nothing is uploaded.

How to use this tool

  1. 1

    Paste JSON

    An array of objects (or a single object) from an API or export.

  2. 2

    Pick the output delimiter

    Comma, semicolon or tab — matching your target spreadsheet or pipeline.

  3. 3

    Copy to your sheet

    Paste straight into Excel, Google Sheets or any CSV consumer.

Key features

JSONCSV
[{"a":1,"b":2}]a,b\n1,2
Rows with different keysUnion columns, blanks for missing
Nested objectsStringified into one cell
Not an object arrayInline error — expected objects

Privacy: your text never leaves your browser

Every Toolflect Text Tool is 100% client-side. The moment you type or paste text, it is analyzed by JavaScript running inside this browser tab. Your text is never sent to our servers, never stored in a database, and never shared with any third party or AI service.

  • No uploads, no accounts, no sign-up
  • No cookies or tracking of your text
  • Works offline once the page has loaded
  • Close the tab and your text is gone from memory

You can even verify it yourself: open your browser's developer tools, switch to the Network tab, and type into the tool — the only requests you will ever see are this page's own static files (HTML, CSS, JavaScript). Nothing you type is ever transmitted.

Frequently asked questions

How are columns chosen?
The union of every object's keys, in first-appearance order — nothing is silently dropped.
What happens to nested values?
Objects and arrays are JSON-stringified into a single cell so no data is lost.
Can I convert a single object?
Yes — it's treated as a one-row array.
Private?
Fully — conversion runs locally in your tab.

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