Make Integers Fuzzy

Make Integers Fuzzy is a browser-based tool that takes any list of integers and messes with the digits just enough to hide or scramble them without ruining the shape. You get to control how it works: you can replace each digit randomly, shuffle the numbers around, or even preserve the same number of digits and structure.

This tool is handy if you’re trying to anonymize data, test number-based layouts, or create fake-but-real-looking examples. It’s fast, safe, and works right in your browser no uploads, no waiting. You can paste in numbers or import a file, tweak a few toggles, and watch the output change live. It’s a quick way to make numbers weird, but still believable.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total characters: 0
Options
Preserve length
Skip leading zeros
Maximize output
Fuzz Mode:

How to Use:

  • Paste or type integers into the Input Integers box use any format you like.
  • Or click Choose File to import a file (like .txt, .csv, or .log).
  • Use the Preserve length toggle if you want fuzzed values to stay the same length.
  • Enable Skip leading zeros if you don’t want to touch digits at the start of numbers.
  • Use the Fuzz Mode radio buttons to pick how fuzzing works:
    • Replace digits swaps each digit with a different one
    • Swap digits randomly reorders the digits within each number
  • Enable Maximize output if you need a bigger space to view the result.
  • The output updates live as you type or change settings.
  • Click Copy Output to copy your fuzzed numbers.
  • Click Export to File to download them.
  • Hit Clear All to reset everything.

What Make Integers Fuzzy can do:

  • Randomly alter or shuffle digits while keeping numbers mostly intact.
  • Choose between “replace” or “swap” modes depending on how messy you want it.
  • Preserve the original number length, or strip down to a new shape.
  • Skip leading zeros to keep numeric structure or formatting rules.
  • Import text files and fuzz everything in one go no retyping.
  • Expand the output window when needed with the Maximize toggle.
  • Live-updating preview with flashing border and character counter.
  • Works entirely client-side safe, secure, and offline-capable.

Example:

Input:

12345
67890
24680

Output (replace mode):

95704
13429
62973

Output (swap mode):

15432
60879
40826

Common Use Cases:

Make Integers Fuzzy is great when you want to obscure real data for testing, teaching, or presentation. It’s perfect for hiding IDs, generating sample data, or adding a playful twist to your datasets. The fuzzed values still look like real numbers just not the ones you started with.

Useful Tools & Suggestions:

If you’re using Make Integers Fuzzy, try Introduce Errors in Integers to take that fuzziness further with more targeted distortion. You can also run Highlight Integers to spot which values got altered the most.

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