Convert CSV Columns to an Array
Create an array from one or more CSV columns. 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 CSV Columns to an Array
- 1. Paste your CSV. Drop the comma-separated rows into the input pane. The chosen columns are collected into a JSON array, useful for pasting straight into code or an API request body.
- 2. Choose which columns to extract. Enter column numbers or header names in the Columns field, separated by commas, or leave it empty to include every column's values in the array.
- 3. Set the header and type options. Leave First row is header (skipped) checked to exclude it from the array. Turn on Convert numbers and booleans to store digit and true/false values as real JSON types, not strings.
- 4. Copy the JSON array. Copy the resulting array and paste it directly into a script, a config file, or anywhere a JSON array of values is expected instead of a full CSV table.
When to use Convert CSV Columns to an Array
Convert CSV Columns to an Array pulls one or more columns out of a CSV and formats their values as a proper JSON array, typed as numbers when appropriate. Use it when you're moving specific values from a spreadsheet directly into code.
- Hardcoding a list of prices into a script. You maintain product prices in a spreadsheet and need them as a JSON array of numbers inside a JavaScript file. Extracting the column with number conversion gets you exactly that.
- Building a test fixture array. A unit test needs an array of sample IDs pulled from a CSV of test data. Converting the ID column saves manually typing out each value with commas and brackets.
- Passing values into an API request body. An API endpoint expects an array field, and the values live in a spreadsheet column. Extracting them as a typed JSON array lets you paste them straight into the request.
Examples
The age column as a JSON array
Input
name,age Ada,36 Grace,45
Output
[36, 45]
About the Convert CSV Columns to an Array tool
Convert CSV Columns to an Array is a free online tool that works entirely inside your web browser. Create an array from one or more CSV columns. 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.
You can shape the output with 3 settings, including Columns (numbers or names, empty = all), First row is header (skipped) and Convert numbers and booleans, and the result refreshes the moment you change one. 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
Is Convert CSV Columns to an Array free to use?
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?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
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?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
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.