Remove Duplicate Lines Online
Paste one value per line, remove duplicate entries in original order, and copy a clean list for code, configs, or spreadsheet cleanup.
Quick answer
This page removes repeated lines from copied text while keeping the first occurrence of each value.
It works well for IDs, emails, tag lists, config keys, and any text export that needs a stable unique list.
InputText with repeated lines
OutputUnique lines in original order
How to use
- Paste your values into the input box.
- Keep trim or skip-empty enabled if the copied data is messy.
- Copy the deduplicated result.
Common questions this page answers
- How do I remove duplicate lines online?
- How do I keep only the first occurrence of each value?
- How do I clean repeated IDs or emails before pasting into code?
Example input and output
Input
apple
banana
apple
cherry
bananaOutput with duplicate lines removed
apple
banana
cherryFAQ
Does it keep the original order?
Yes. The tool keeps the first occurrence of each value and preserves that order in the output.
Can I ignore empty lines?
Yes. Leave skip-empty enabled to drop blank rows before deduplication.
Can I trim whitespace before comparing values?
Yes. Turn on trim to normalize copied values like ` apple ` and `apple` before removing duplicates.