How to Use the Duplicate Line Remover & Occurrence Frequency Counter
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1
Paste your list of emails, IP addresses, keywords, or log lines.
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2
Choose whether comparison should be Case-Sensitive and whether to Trim Whitespace.
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3
View the frequency table showing unique items and their exact count.
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4
Click "Copy Deduplicated Lines" or export the complete frequency report.
Practical Example & Use Case
Common Real-World Scenario
Deduplicating a marketing newsletter list of 10,000 email addresses and seeing which domains appear most frequently.
Technical Notes & Limitations
Browser Engine Architecture
Fast in-memory hashing handles lists of over 100,000 lines without freezing.
Frequently Asked Questions
Is my data sent to any cloud server?
No! Your lists and confidential logs are parsed entirely in your browser memory.