Find Repeating List Items
Find and print items that repeat. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Find Repeating List Items
- 1. Paste your list. Enter your items into the input pane, one per line. Any list you suspect has repeated values mixed in works here.
- 2. Decide whether to show occurrence counts. Turn on Show occurrence counts to see how many times each repeating item appears next to its value. Leave it off for just a plain list of which items repeat.
- 3. Copy the repeating items. The output pane lists only the items that appear more than once in your list. Copy the result wherever you need to see just the repeats.
When to use Find Repeating List Items
Find Repeating List Items prints every value that occurs more than once in a pasted list. Use Find Repeating List Items whenever you want a quick look at exactly which items repeat, without removing anything from the original list.
- Spotting recurring issues in a bug report list. A list of bug report titles has some issues reported multiple times by different people, and finding the repeats shows which bugs are getting the most complaints.
- Checking for repeated usernames during a signup review. A list of newly registered usernames is being reviewed for accidental duplicates from a signup form bug, and finding repeats surfaces exactly which usernames appeared more than once.
- Identifying words that recur in a piece of writing. A list of words pulled from an essay or script is being checked for overused terms, and finding the repeating ones highlights candidates for a rewrite.
- Counting how often a repeat occurs. Turning on occurrence counts tells you not just that an item repeats but exactly how many times, which matters when deciding whether three repeats of the same error is worth escalating.
Examples
Find repeated items
Input
cat dog cat bird dog
Output
cat dog
About the Find Repeating List Items tool
Find Repeating List Items is a free online tool that works entirely inside your web browser. Find and print items that repeat. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 114 List utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with the Show occurrence counts setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Find Repeating List Items 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.