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TextText tools
Remove Duplicate Lines
Keep the first occurrence of each line in your text.
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How to use remove duplicate lines
- Paste the line-based list into Your text.
- Optionally enable Ignore case when comparing lines, then select Process text.
- Review the lines removed and compare the retained list before copying it.
Work through an example
Remove repeated whole lines, decide whether case matters, and understand how spaces and blank lines affect the result.
Deduplicate a line list while keeping its first entries →Formats, privacy, and practical limits
This tool processes the values you enter in your browser. No account or upload to ERITHRA is required.
Files and generated results exist only for this tab session. Download any result you want to keep before leaving the page. Browsers may use temporary memory or disk cache while processing.
Frequently asked questions
Which occurrence is kept?
The first matching line is retained, preserving the original order of unique lines.
Are surrounding spaces ignored?
No. Lines are compared as entered, except for optional case folding. Clean unintended whitespace separately if that is appropriate.