Reverse Integer Digits

The Reverse Integer Digits tool flips the digits of any number you give it turning 123 into 321, or -456 into 654 (or -654, depending on your settings). It updates live, works entirely in your browser, and lets you clean, transform, and export results with ease.

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 items: 0
Options
Ignore non-integers
Keep negative sign
Remove duplicates
Maximize output

How to Use:

  • Paste or type one integer per line into the input box.
  • Or use the Choose File button to import a text file.
  • Use the toggles in the Options box:
    • Ignore non-integers – skips invalid lines.
    • Keep negative sign – adds the minus sign back after reversing.
    • Remove duplicates – filters repeated results after reversing.
    • Maximize output – expands the output area.
  • The tool updates instantly as you type or adjust options.
  • Click Copy Output to copy the reversed list.
  • Click Export to File to save it.
  • Hit Clear All to reset the input and output.

What Reverse Integer Digits can do:

This tool takes each integer you provide and reverses the order of its digits. So 1200 becomes 0021, and if you choose to keep the sign, -89 becomes -98. It works on any length of numbers and gives you a clean line-by-line result.

It’s fast, safe, and browser-based no uploads, no waiting. You can filter out invalid lines, remove duplicates, and flip through lists of numbers without writing a single line of code.

Example:

Input:

123
-40
apple
55

Output (with ignore + sign on):

321
-04
55

Common Use Cases:

Great for transforming data, prepping logic puzzles, reversing user input, or simply breaking numbers down. Whether you’re a dev, student, or just experimenting with number patterns this gives you instant, clean results with no fuss.

Useful Tools & Suggestions:

After using Reverse Integer Digits, try Shuffle Integer Digits to mix them up randomly instead of flipping. Or go with Sort Integer Digits to bring structure back after the reversal.

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