Unique Lines
Remove duplicate lines (with options to trim and keep order).
Informational only; verify critical results independently.
How to use
- Paste a line-based list: emails, IDs, URLs, or log keys.
- Enable trim if spaces cause “duplicate” lines that look identical.
- Run Unique; the first occurrence of each line is kept in order.
- Copy the deduped list into a spreadsheet, SQL IN clause, or config.
- Pair with Sort Lines if you also need alphabetical order.
- For case-insensitive uniqueness, normalize case in Case Converter first.
Examples
- Dedupe a pasted email invite list
- Remove repeated order IDs from a CSV column
- Clean up duplicate paths from a find command
- Unique Git remote URLs after a merge mistake
- Shrink a survey export with repeated respondent tokens
- Prep keywords for a tag cloud without duplicates
FAQ
- Is order preserved?
- Yes—the first seen line wins; later copies are dropped.
- Case sensitivity?
- hello and Hello differ unless you normalize case first.
- Empty lines?
- Multiple blank lines count as duplicates of each other.
- Windows vs Unix newlines?
- Paste from either source; the tool splits on line breaks it recognizes.
- Performance on huge files?
- Very large inputs may be slow; consider chunking for million-line logs.
- Privacy?
- Processing stays in your browser.
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Last updated: 2025-09-15