Will it change the order of my lines?
By default, it preserves the exact original order of first occurrence.
How to Use Remove Duplicate Lines
Step 1: Paste Text List
Paste any list of lines, keywords, emails, or data rows.
Step 2: Set Options
Toggle Case Sensitive matching and Trim Whitespace before comparing.
Step 3: Copy Unique List
View exact duplicate count removed and copy your clean list.
Key Features & Capabilities
- Instant Set-based O(N) deduplication algorithm
- Option to ignore letter case and leading/trailing spaces
- Displays exact duplicate lines removed and remaining unique rows
Specifications & Limits
- Supported Formats: .txt, .csv
- Max File Size: 10 MB
- Batch Processing: Single Item
- Free Tier Limit: Deduplicate up to 100,000 lines in-memory
Frequently Asked Questions
Can I ignore case differences when finding duplicates?
Yes, toggling case insensitivity treats 'Apple' and 'apple' as identical entries.
Related Tools
- Sort Text Lines — Sort lines alphabetically (A-Z, Z-A), numerically, by length, or randomly shuffle.
- Text Cleaner & Formatter — Strip extra whitespace, remove HTML tags, deduplicate lines, and format text.
- Character Frequency Counter — Analyze letter and word frequency distributions with visual bar charts.