Convert an Array of Arrays to CSV
Convert an array of arrays of fields to a CSV file. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Convert an Array of Arrays to CSV
- 1. Paste your array of arrays. Paste a JSON structure like an outer array containing inner arrays of field values into the input pane. Each inner array becomes one CSV record.
- 2. Review the parsed rows. The tool reads every inner array in order and lines its values up as columns. There are no settings to configure, since the JSON structure fully determines the output.
- 3. Copy the CSV output. Copy the comma-separated rows produced and paste them into a spreadsheet or any tool that expects CSV instead of a nested JSON array structure.
When to use Convert an Array of Arrays to CSV
Convert an Array of Arrays to CSV turns a nested JSON structure, an array where each element is itself an array of field values, into ordinary CSV rows. It's the format many charting libraries and spreadsheet APIs use internally to represent tabular data.
- Exporting data from a charting library. A JavaScript charting library represents its dataset as an array of arrays internally, and you copied it from the browser console. Converting it to CSV makes it usable elsewhere.
- Extracting rows from an API's raw response. An API returns tabular data as a nested JSON array rather than an array of objects. Converting it to CSV gets it into a format any spreadsheet can open.
- Debugging a data transformation script. You logged an intermediate array of arrays while writing a script and want to eyeball it as a table rather than nested brackets. Converting to CSV makes the shape clearer.
Examples
Inner arrays become records
Input
[["name", "age"], ["Ada", 36]]
Output
name,age Ada,36
About the Convert an Array of Arrays to CSV tool
Convert an Array of Arrays to CSV is a free online tool that works entirely inside your web browser. Convert an array of arrays of fields to a CSV file. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 133 CSV utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
There is nothing to configure. Provide the input and the result appears on its own. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Convert an Array of Arrays to CSV cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.