How to use
Select line or sentence mode, choose case handling, then find duplicates.
TextoLab · Works in your browser
Duplicate Finder
Find exact repeated lines or sentences and create a cleaned copy.
✓ Your text stays in your browser.
Result
How it works
The selected mode compares exact normalized lines or sentences. Repeated whitespace can be collapsed, while letter case remains significant unless you choose otherwise.
Understanding the result
Each group lists its occurrence positions. Cleaning keeps the first normalized occurrence.
Practical example
Find a paragraph accidentally pasted twice, repeated spreadsheet exports, or duplicate checklist lines.
Limitations
Sentence-mode cleanup joins retained sentences with spaces and may simplify original formatting.
Common question
Does it change my original text?
No. A separate cleaned result is created only when you request it.
What this tool checks and changes
- Checks exact normalized lines or sentences.
- Can ignore case and collapse spacing differences.
- Reports occurrence positions and produces an optional cleaned copy.
Practical uses
- Finding duplicated paragraphs after pasting.
- Cleaning repeated rows in a simple export.
- Checking checklists and notes for exact repeats.
Duplicate Finder
A reliable three-step workflow
The processing remains in this browser; the supplied text is not sent to an external text-processing service.
- 1
Start with the original
Paste the complete text and preserve the parts whose structure matters.
- 2
Choose only relevant options
Each option changes a specific rule. Leave unrelated settings off.
- 3
Review before using the result
Read the output in context, then copy it only after confirming the intended meaning and formatting.