Increase All Digits in a Number
Add one to every digit in a number. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Increase All Digits in a Number
- 1. Paste your numbers. Enter one number per line into the input pane, including negative numbers or decimals if you have them.
- 2. Choose how 9 behaves. Turn on Wrap 9 around to 0 so a digit of 9 rolls over to 0 when increased, matching odometer-style wraparound instead of the digit simply growing past 9.
- 3. Read the digit-by-digit result. Every individual digit in the number gets incremented by one independently, so 129 becomes 230 when wraparound is on, unlike incrementing the whole number's value.
- 4. Copy the results. Copy the digit-shifted numbers into a cipher exercise, puzzle generator or pattern-based test fixture.
When to use Increase All Digits in a Number
Increase All Digits in a Number shifts each individual digit up by one, wrapping 9 back to 0 if you choose, which is a very different operation from adding one to the number's overall value. Use this tool whenever you need a digit-substitution shift rather than arithmetic addition.
- Building a simple digit-substitution cipher. A puzzle hunt wants a basic obfuscation scheme where every digit shifts up by one with wraparound, so a phone number or code becomes unreadable at a glance without a key.
- Generating a pattern-shifted test fixture. A test suite for a digit-transformation function needs input and expected-output pairs where every digit moves up by exactly one, and this tool produces the expected output reliably.
- Creating a visual number puzzle for a game. A brain-teaser mobile game shows a shifted number and asks players to reverse the digit shift to find the original, so this tool generates the shifted puzzle values.
Examples
Add one to each digit (9 wraps to 0)
Input
129 -9.9
Output
230 -0.0
Without wrapping, 9 stays 9
Input
129
Output
239
About the Increase All Digits in a Number tool
Increase All Digits in a Number does its work locally, right in the browser. Add one to every digit in a number. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the Number Tools collection on EditSafely, a set of 194 small, focused Number utilities that share the same instant, private workspace.
You can shape the output with the Wrap 9 around to 0 setting, and the result refreshes the moment you change it. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Increase All Digits in a Number cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.