Decrease a Number

Decrease a Number lets you subtract a value from every number you input. Whether you’re adjusting scores, offsetting values, or simplifying data, this tool processes numbers instantly with live output and optional trimming.

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 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 how much to subtract using the Decrease by input.
    • Toggle Trim whitespace to clean up formatting.
  4. Results appear live in the output box.
  5. Use Copy Output or Export to File to save your result.
  6. Click Clear All to reset everything and start fresh.

What Decrease a Number can do:

The tool reads each line of input, tries to convert it into a number, then subtracts your chosen amount. If the line isn’t numeric, it stays unchanged. This makes it safe for partial or mixed input.

It works with decimal values and can process large lists via file import. A counter shows how many lines were handled, and the output flashes on every update.

Example:

Input:

7
42
908

Settings: Decrease by: 5, Trim whitespace: ON

Output:

2
37
903

Common Use Cases:

Perfect for adjusting numeric data in reports, simplifying test values, offsetting metrics, or transforming datasets without formulas. Whether you’re teaching, coding, or analyzing data, this tool makes subtraction fast and flexible.

Useful Tools & Suggestions:

If you’re adjusting numbers manually, Increase a Number gives you the same control in the other direction. And for more dynamic shifts, Perturb Numbers introduces random variations that still feel realistic.

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