Remove Duplicate Lines.
Deduplicate lines without uploading text or silently changing normalization rules. Remove duplicate UTF-8 lines locally while preserving first occurrence order and making trim, case and line-ending policies explicit.
- ✓Runs in your browser
- ✓No account required
- ✓Verified output
Use Remove Duplicate Lines
Private in this browser. Text, filenames, options, derived facts and output stay in this browser.
No file selected.
Verified result
Download resultHow it works
- 01
Paste text or choose a UTF-8 file up to 5 MB.
- 02
Choose trimming, case sensitivity, empty-line and line-ending behavior.
- 03
Download output only after uniqueness and strict UTF-8 checks pass.
Frequently asked questions
Is my text uploaded?
No. Processing and independent verification stay local in this browser.
Does Remove Duplicate Lines upload my data?
Remove Duplicate Lines runs locally in your browser. Text, filenames, options, derived facts and output stay in this browser.
What output does Remove Duplicate Lines create?
Remove Duplicate Lines creates Txt output after the result passes its local verification checks.