🧹 Text Deduplicator
Remove duplicate lines from text, with case-insensitive and order-preserving options
✓ Runs entirely in your browser — your data never leaves this device
About This Tool
This deduplicator removes repeated lines from text in one click. It is commonly used to clean logs, tidy keyword lists, dedupe mailing lists and normalize imported data. It supports case-insensitive comparison, automatic trimming, and preserves the order of first occurrences.
How to Use
- Paste your text into the input box on the left
- Tick "Ignore case" or "Trim lines" as needed
- The deduplicated result appears on the right in real time — click Copy to use it
FAQ
Will the order change?
No. The order of first occurrences is preserved. Use the Line Sorter tool if you also need sorting.
Can it ignore case?
Yes. With "Ignore case" enabled, ABC and abc are treated as one line and only the first occurrence is kept.
Is my data uploaded?
No. Everything runs locally in your browser; your text never leaves the device.