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Converters

JSON to CSV Converter

Convert JSON arrays into clean CSV with automatic header detection and nested-object flattening.

Runs entirely in your browser — your data never leaves your device.

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How to use this tool

  1. 1Paste a JSON array of objects into the editor.
  2. 2Choose your delimiter and whether to flatten nested objects.
  3. 3Download the CSV or copy it into your spreadsheet.

Frequently asked questions

How are nested objects handled?
Nested objects are flattened into dotted column names (for example address.city) so they fit into a flat CSV grid.
Can I change the delimiter?
Yes. You can use commas, semicolons, or tabs depending on what your spreadsheet software expects.
Is my data uploaded to a server?
No. Every tool on JSONPost runs entirely in your browser using JavaScript. Your JSON never leaves your device, so it is safe to use with private or sensitive data.

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JSON to TSV Converter

Convert JSON into tab-separated values for easy pasting into spreadsheets and data tools.