Can it handle large files?

lockProcessed entirely in your browser. Your input is not uploaded.

Remove Duplicate Lines

Deduplicate lists, email lists, CSV rows, and arrays with trim, case-sensitivity, and empty-line filters.

Original Lines9

Unique Lines6

Duplicates Removed3

Original List (Input)

Deduplicated Result6 lines

apple
banana
orange
grape
pineapple
mango

Trim WhitespaceCase SensitiveIgnore Empty Lines

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verified_user

TaskKit Client-Side Security Guarantee

100% in-browser processing. Zero telemetry. Support independent open web tools.

Paste rows of data, emails, or IDs.

Toggle Trim Whitespace, Case Sensitive, or Ignore Empty Lines.

Copy clean deduplicated list or download as TXT.

verifiedInstant Deduplication

Processes lists with tens of thousands of lines in milliseconds.

verifiedDeduplication Telemetry

Displays original line count, unique count, and total duplicates removed.

Yes, modern browsers can process hundreds of thousands of lines in memory without freezing.

Text Utilities

Clean up messy text by removing extra spaces, trailing tabs, redundant blank lines, and broken line wraps.

Compare two text versions side-by-side or stacked. Highlight additions, removals, and unchanged lines instantly.

verified_user100% Client-Side Guarantee

TaskKit never records, stores, or transmits the contents of your tool workspaces. Your data stays securely on your machine.