JSON to CSV

Array of objects to CSV with header. Comma separator, quoted fields when needed.

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Overview

JSON and CSV are the two most common formats for transferring and storing tabular data, each with its natural domain. JSON was born for hierarchical data: nested objects, typed arrays, flexible structures. CSV is flat by definition: rows and columns, everything text. The conversion makes sense when the JSON represents a real table, typically an array of objects with the same keys in every element.

CSV is the universal exchange format with spreadsheets such as Excel, Google Sheets, and LibreOffice, and with analysis tools like pandas in Python, R, and BI platforms. Even if your system produces JSON, exporting to CSV lets non-technical users explore and filter data without writing code. For imports into relational databases, bulk inserts via COPY in PostgreSQL or LOAD DATA in MySQL, and automated reports, CSV is the expected input format.

The conversion has structural limitations. Nested values such as objects within objects and value arrays do not exist in the flat CSV model. This tool handles those cases predictably: strings, numbers, booleans, and null become simple cells; nested objects and arrays are serialized as JSON text in the cell. If you need real structural flattening, apply it to the JSON before converting.

The default separator is a comma, but in European locales where a comma is the decimal separator, Excel may misread the file. In that case, consider semicolons or use the spreadsheet import wizard. Fields containing commas, double quotes, or line breaks are automatically wrapped in double quotes per RFC 4180.

Technical deep dive

Common questions summarized

  • What is this tool for?: It runs fully in your browser: useful to validate, format, or convert data in everyday development.
  • Are my inputs sent to a server?: Processing happens locally with JavaScript. We do not store what you paste into the text areas.
  • Can I use this for real production data?: Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.

Sample payload to try

  • See also the larger "Code Snippets" sample; paste this excerpt to try locally: Input — [{"nome":"Ana","idade":30},{"nome":"Bob","idade":25}]

Tool guide

  • What JSON is See the formatter section. Here the focus is usually an array of objects with a similar shape in each slot.

  • What CSV is CSV (Comma-Separated Values) is tabular text: rows are records; columns are separated by commas (or another delimiter). It is the universal export format for spreadsheets and BI.

  • What the converter does Turns a JSON array of objects into a CSV table with a header row and quoted cells when needed.

  • Why use the converter Open API data in Excel, Google Sheets, or tools that do not read JSON natively, or quickly build report attachments.

Code Snippets

Code example
[{"nome":"Ana","idade":30},{"nome":"Bob","idade":25}]

Input

[{"nome":"Ana","idade":30},{"nome":"Bob","idade":25}]

FAQ

What is this tool for?

It runs fully in your browser: useful to validate, format, or convert data in everyday development.

Are my inputs sent to a server?

Processing happens locally with JavaScript. We do not store what you paste into the text areas.

Can I use this for real production data?

Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.