Pick an Integer Digit

The Pick an Integer Digit tool lets you extract specific digits from integers either the first, last, a random one, or a specific position you choose. It works on a list of integers, one per line, and returns the selected digit from each. You can also choose to ignore invalid lines or keep them in the output.

This is great for creating digit-based training sets, analyzing number structure, or pulling features from large datasets. Everything runs live in your browser no uploads, no delay.

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
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Options


Ignore non-integers
Maximize output

How to Use:

  • Paste integers (one per line) into the Input Integers box
  • Or use Choose File to import a plain-text file with integers
  • Use the Pick mode dropdown to choose how to select a digit:
    • First digit picks the first digit from each number
    • Last digit picks the last digit
    • Random digit selects one digit at random
    • Specific position picks a digit at the position you specify (e.g., 2 = second digit)
  • Set a Position (starting from 1) if using specific-position mode
  • Toggle Ignore non-integers to skip or keep invalid lines
  • Toggle Maximize output to expand the result view
  • Click Pick or just type to see results update automatically
  • Use Copy Output or Export to File to save results
  • Click Clear All to reset everything

What Pick an Integer Digit can do:

This tool breaks down integers and pulls just the digit you need from each. You can use it to isolate leading digits, trailing digits, or random digits from a list of values. It handles negatives and formatting automatically.

Example:

Input:

12345
78
9

Mode: Last digit →

5
8
9

Common Use Cases:

Use this tool to extract features for machine learning, analyze number patterns, build puzzles, or isolate components for simulations. It’s fast, flexible, and perfect for digit-level tasks.

Useful Tools & Suggestions:

After using Pick an Integer Digit, try Shuffle Integer Digits to randomize the rest and see how your selection fits into the mix. Or run Highlight Integers if you want to visually spot that picked digit across a list.

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