Center Integers

The Center Integers tool takes a list of numbers and centers each one inside a fixed-width string. You pick the total width, choose a padding character, and it handles the rest even if the number’s already wider than the field. It’s great for formatting numbers into columns, ASCII layouts, or any time you want your output to look clean and aligned.

Paste a list, set your options, and the tool updates instantly with a preview that adjusts live as you tweak.

Paste your input above or import a file below.
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Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 0
Options
Trim values
Maximize output

How to Use:

  • Paste your list of integers into the Input Text box (one per line).
  • Or click Choose File to import from a supported text file.
  • Set the Width field to define the total length of each output line.
  • Use the Padding Char field to choose what fills the space (e.g., . or _).
  • Toggle Trim values to remove extra spaces from each line before centering.
  • Enable Maximize output to expand the output preview box if needed.
  • Click Copy Output to copy the results.
  • Use Export to File to download the result.
  • Click Clear All to reset everything.

What Center Integers can do:

This tool is made for clean layout control. You can format numbers so they appear centered within lines of fixed width perfect for text-based tables, documentation, code output, or visual formatting. Whether you’re preparing inputs for old-school systems or just want neat text columns, this tool gives you that control without needing to fiddle manually. You get live preview, file import/export, and plenty of customization to get things looking right.

Example:

Input:

12
1
1234
7
99

Width: 10, Padding Char: .

Output:

....12....
.....1....
..1234....
.....7....
....99....

Common Use Cases:

Use it to align numbers in fixed-width layouts, format test data, prep input for code that expects clean spacing, or build ASCII-style tables. It’s also helpful for quick visual cleanup when sharing data in markdown or chat. The padding is flexible, and the live preview means you can get it looking just right in seconds.

Useful Tools & Suggestions:

After using Center Integers, try Right-align Integers if you want a different layout style for comparison. And if you’re building structured formats like tables, Create an Integer Array keeps everything cleanly spaced.

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