Find and Replace Integers
Swap every occurrence of one integer for another. 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 Find and Replace Integers
- 1. Paste your integers. Enter the list of integers you want to edit, in whatever spacing or line breaks you already have. The tool locates every matching value regardless of formatting.
- 2. Set the integer to find. Enter the exact number in Find integer that you want swapped out, such as 1. Every occurrence of that exact value in the list is targeted.
- 3. Set the replacement value. Enter Replace with to specify what each match becomes, such as 9. This can be any integer, including a negative number or zero.
- 4. Copy the updated list. Copy the result, where every matched integer has been swapped for your replacement and every other number is left untouched in its original position.
When to use Find and Replace Integers
Find and Replace Integers swaps one specific whole number for another everywhere it appears in a list, without touching anything else. It behaves like text find-and-replace but works on numeric values instead of substrings. Reach for it when a single number needs a global correction.
- Correcting a repeated data entry mistake. A spreadsheet export used the placeholder value 1 for a missing category everywhere, but it should have been 9. Replace every 1 with 9 across the exported column in one pass.
- Remapping a status code. An old API returned status code 0 for success, and a new system expects 1. Find and replace 0 with 1 across a batch of logged responses before reprocessing them.
- Updating a version number in a list. A configuration list repeats the number 2 as a build flag that needs to become 3 everywhere it shows up. Run the swap once instead of editing each line by hand.
- Anonymizing a specific ID. You need to replace every instance of a particular customer ID, say 1, with a placeholder like 9 before sharing a dataset externally.
Examples
Replace 1 with 9
Input
1 2 1 3
Output
9 2 9 3
Separators are preserved
Input
4 5 4
Output
0 5 0
About the Find and Replace Integers tool
Find and Replace Integers runs as plain JavaScript in your browser tab, with no server behind it. Swap every occurrence of one integer for another. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Integer Tools section, 133 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 2 settings, including Find integer and Replace with, and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Find and Replace Integers free to use?
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?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
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?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
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.