Remove repeated lines while keeping order
Keep the first occurrence of each line and optionally trim surrounding spaces, distinguish case or remove empty lines.
All tools
Clean repeated text lines
Text Deduplicator
Remove repeated lines while preserving the first occurrence and the original line order.
Runs locally in your browserClean a list
Paste one item per line, choose the matching options, run deduplication, review the removed count and copy the cleaned result.
Method and sources
The transformation is implemented in Zituo's local JavaScript modules. Inputs are parsed and processed in memory, with automated tests covering common syntax and boundary cases.
Frequently asked questions
What can Text Deduplicator do?
Keep the first occurrence of each line and optionally trim surrounding spaces, distinguish case or remove empty lines.
How do I use Text Deduplicator?
Paste one item per line, choose the matching options, run deduplication, review the removed count and copy the cleaned result.
Does Text Deduplicator upload my data?
The tool runs in your browser. Your selected files, entered content and generated results are not sent to Zituo Tools.