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🧹 Remove Empty & Duplicate Lines

Clean up your text instantly — remove blank lines, duplicate lines, trim whitespace, and more. 100% private, runs in your browser.

Input Text
Drop a text file here or click to upload .txt, .csv, .log, .md, .json, and more
Lines: 0 · Chars: 0 · Words: 0 Size: 0 B
Processing Options
Processing Log
; TechOreo — Remove Empty & Duplicate Lines
; Browser-based · No upload · 100% private
; ──────────────────────────────────────
; Paste text or upload a file to get started
Settings
Keep Occurrence
Empty Lines
Sort Order
Line Ending
"Keep Occurrence" controls which copy of a duplicate line is kept. "Remove All" removes every occurrence.
Keyboard Shortcuts
Ctrl+↵ Clean text
Alt+C Copy output
Alt+D Download output
Alt+S Swap input ↔ output
Alt+X Clear all
Alt+O Open file
Quick Analysis
Enter text to see analysis
What This Tool Does
Remove Empty Lines — Deletes blank lines or lines containing only whitespace characters.
Remove Duplicates — Finds and removes repeated lines, keeping the first (or last) occurrence.
Trim Whitespace — Strips leading/trailing spaces and tabs from every line.
Normalize Spaces — Collapses multiple consecutive spaces into a single space.
Sort Lines — Alphabetically sort remaining lines in ascending or descending order.
Privacy
🔒 100% Client-Side
All text processing happens entirely in your browser. Nothing is sent to any server.
Your text never leaves your device.

About Removing Empty & Duplicate Lines

Why Clean Text?

Messy text with extra blank lines and duplicates wastes space and makes data hard to read. Cleaning up text files, CSV data, email lists, and code improves readability and reduces file sizes.

Common Use Cases

Clean up email lists, remove duplicate entries from databases, tidy up log files, normalize configuration files, or prepare data for import into spreadsheets and other tools.

Case Sensitivity

By default, duplicate detection is case-sensitive ("Hello" ≠ "hello"). Enable case-insensitive mode to treat lines with different capitalization as duplicates.

Preserving Order

This tool preserves the original order of your lines by default. Use "Keep First" to retain the earliest occurrence or "Keep Last" for the latest. Enable sorting for alphabetical output.