List Deduplicator
Clean copied email lists, IDs, tags, names, or spreadsheet columns. Empty entries are removed, surrounding whitespace is trimmed, and comparison can be case-sensitive or case-insensitive.
Local text workbenchBrowser local
Processed output will appear here.
Processed output will appear here.
Data handling notes
- The first occurrence keeps its original spelling and position.
- Input is split by new lines, commas, semicolons, and common Chinese separators.
- The list stays in the browser and is never uploaded.
Before you rely on the result
This tool is intended for fast inspection and routine preparation. It can save time, but it does not replace review when the result affects production systems, security settings, business data, or legal obligations.
- Check representative inputs instead of assuming one example covers every edge case.
- Do not paste secrets, private customer data, or credentials unless you have confirmed the page processes that data locally and the use is allowed by your organization.
- Copy the output into your own workflow only after checking formatting, timezone, encoding, or syntax assumptions.
- Encoding tools transform representation, not trust. Decoded text can still be unsafe, misleading, or unsuitable for direct execution.
FAQ
Is the list sorted?No. The original order is preserved and only later duplicates are removed.
What happens to `Ada` and `ada`?They merge in case-insensitive mode and remain separate in case-sensitive mode.