Remove Duplicate Lines
Clean up any list by removing repeated lines, with case and whitespace options.
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About the Remove Duplicate Lines
Remove Duplicate Lines deletes repeated entries from any list — emails, URLs, SKUs, log rows or names — so every value appears exactly once. The tool works entirely in your browser, supports case-insensitive matching, ignores whitespace and can sort the cleaned list alphabetically in a single step.
How to use
- Paste your list into the input box (one item per line).
- Toggle Case-insensitive, Trim whitespace and Remove empty lines to match how you want duplicates detected.
- Click Remove duplicates — the tool keeps the first occurrence of each unique line and shows how many were removed.
Benefits & key features
- Perfect for tidying exported CSVs, customer lists and scraped URLs in seconds.
- Two toggles cover 95% of real-world use cases (case + whitespace).
- Optional alphabetical sort produces a canonical, diff-friendly output.
- Nothing is uploaded — safe for confidential business data.
Pro tip
Combine Case-insensitive with Sort alphabetically to turn messy raw input into a clean, canonical list ready to paste into a spreadsheet or database.
Why choose toolsfy for Text & Document tools?
Writing tools on the web typically lean toward either "blog-post-assistant with an AI upsell" or "plain counter with zero insight". toolsfy aims for the middle ground: a collection of sharp, single-purpose text utilities that run inline while you draft, with no usage cap and no sign-up. Because every tool is client-side, you can happily paste confidential paragraphs, leaked transcripts or half-finished blog drafts without second-guessing where they end up.
Common use cases
- Students counting words against strict assignment limits while the essay is still being edited, not after it has been submitted.
- Copywriters A/B-testing two versions of a landing page paragraph and checking whether one reads at a different grade level than the other.
- Journalists cleaning up a pasted transcript — removing line breaks, converting case, stripping extra whitespace — before a Ctrl-F search.
Frequently asked questions
Is my text saved anywhere after I leave the tab?
Only if the tool explicitly offers a localStorage auto-save (Essay Structure Checker, Plagiarism Self-Check, Online Notepad). Everything else is gone the moment the tab closes.
Can I use non-English text?
Yes. Counts are Unicode-aware (Devanagari, CJK, emoji). Readability metrics are tuned for English but still useful as a relative score for other languages.
Does it handle very large essays?
The tools have been tested up to ~100,000 words in a single paste. Past that, browsers slow down because of memory, not toolsfy.