Create an Integer Array
Turn a list of integers into a programming-language array. 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 Create an Integer Array
- 1. Paste the integers. Enter your list of integers, separated by spaces, commas or newlines. These become the elements of the generated array.
- 2. Choose language, name and separator. Pick JSON, JavaScript, Python or C / C++ from Language / style to match your target syntax, optionally set a Variable name to wrap the array in a declaration, and set Element separator for the punctuation between values.
- 3. Copy the array literal. Copy the generated code, such as an array like 1, 2, 3, and paste it directly into your source file, saving you from manually typing brackets and commas.
When to use Create an Integer Array
Create an Integer Array turns a plain list of numbers into a properly formatted array literal in JSON, JavaScript, Python, or C / C++ syntax. Create an Integer Array saves the tedious work of adding brackets, commas and a variable declaration by hand.
- Turning spreadsheet data into source code. You copied a column of test values from a spreadsheet and need them as a JavaScript or Python array literal to paste into a unit test file.
- Preparing a JSON fixture for an API test. A test fixture needs a JSON array of integer IDs. Paste the raw values in, select JSON, and copy the properly bracketed and comma-separated result.
- Declaring a constant array in C or C++. You need a static array of integer constants declared in a C header file. Set Language / style to C / C++, add a Variable name, and copy the ready-to-paste declaration.
- Reformatting a list with a different separator. A downstream tool expects array elements separated by semicolons instead of commas. Set Element separator accordingly and regenerate the array without retyping every value.
Examples
A JSON array literal
Input
1 2 3
Output
[1, 2, 3]
A named C array
Input
4 5 6
Output
int nums[] = {4, 5, 6};About the Create an Integer Array tool
Create an Integer Array runs as plain JavaScript in your browser tab, with no server behind it. Turn a list of integers into a programming-language array. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Integer Tools section, 133 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 3 settings, including Language / style, Variable name (optional) and Element separator, and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Does Create an Integer Array 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.