How to use the Reverse Integer Digits
- Enter or paste your input in the box (or set the options, if the tool needs no input).
- Adjust the options to match what you need — the result updates as you type.
- Copy the result or download it, and keep editing if you want a different outcome.
What does this tool do?
Reverses the digits of each integer it finds: 12345 becomes 54321 and 1200 becomes 0021. Handy for palindrome checks, number puzzles and programming exercises.
Everything runs in your browser, so nothing you enter is uploaded or stored.
Why use it?
- Free, with no sign-up and no limits.
- Instant results as you type.
- Private — your data stays on your device.
Example
Input: 123 4056
Result: 321 6504
Privacy
Everything you type is processed in your browser. Nothing you enter is sent to our servers or stored by us. There's no account to create and nothing to install.
Frequently asked questions
What happens to trailing zeros?
They move to the front, so 1200 becomes 0021. The result is shown as text so those zeros are kept.
Is the Reverse Integer Digits free to use?
Yes. It is free, needs no account and has no daily limit.
Last reviewed by the M2Toolkit team.