Zero-pad a Number

Zero-pad a Number takes each number you enter and adds leading zeros until it matches the length you specify. Whether you need numbers formatted for alignment, database consistency, or coding tasks, this tool makes it easy and fast.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .log
Total items: 0
Options
Trim whitespace

How to Use:

  1. Paste your numbers into the Input Numbers box, one per line.
  2. Or import a .txt, .csv, or .log file using the Choose File button.
  3. In the Options box, set the total desired length for each number.
    • For example, setting it to 5 will turn 7 into 00007.
  4. Toggle Trim whitespace if your input might have extra spaces.
  5. The output updates live no need to click.
  6. Use Copy Output or Export to File to save your results.
  7. Click Clear All to start over.

What Zero-pad a Number can do:

It ensures every number has the same length by padding from the left with zeros. You define how long the final string should be. If a number is already longer than the limit, it stays untouched.

The tool is great for formatting IDs, aligning numeric data, or preparing fixed-width outputs. It also includes a live counter that shows how many lines were processed.

File imports are handled safely nothing is executed, just plain text is read.

Example:

Input:

7
42
908

Settings: Total length: 5, Trim whitespace: ON

Output:

00007
00042
00908

Common Use Cases:

Use this tool to prep consistent-length numbers for serial IDs, barcode systems, table alignment, or anything that requires padded formatting. It’s especially helpful when working with spreadsheets, scripts, or exported data from databases.

Useful Tools & Suggestions:

If you’re padding with zeros, Left-pad Text can give you even more flexibility with spacing or alignment. And when you’re ready to dress those numbers up a bit, Change Number Font adds visual flair without touching the actual value.

Related Tools