Clean lists by detecting and removing duplicate lines from text. Case-sensitive or insensitive, trim whitespace, keep or discard order — done instantly.
✓ Free · No UploadUnlimited TextCase Options · Trim · Sort100% Client-Side
🔁 Deduplicate
0 lines · 0 duplicates
Input0 lines
Lines: 0Characters: 0Words: 0
Output—
Kept: 0Removed: 0Output lines: 0
⚙️ Options
Comparison
Case-insensitive
Trim whitespace
Ignore blank lines
Output Order
Duplicate Handling
Output
Add line numbers
Show duplicate count
ℹ️ Info
💡
All processing happens in your browser — your text never leaves your device.
How it works
Paste any text with one item per line. The tool scans each line and removes any that have already appeared above (or below, if "keep last" is selected). Results update instantly.