Free Remove Duplicate Sentences Tool

Detect and delete repeated sentences from essays, spin-tax output or scraped content — smart Unicode sentence detection included.

Word Counter

Runs entirely in your browser — paste text and watch the results update instantly. Nothing is uploaded.

100% Client-Side — Your text stays in your browser. Nothing is uploaded.

How to use this tool

  1. 1

    Paste repetitive text

    AI-spun drafts, scraped pages, meeting notes — anything with echo sentences.

  2. 2

    Repeats disappear

    Sentences are detected by real endings (. ! ? ؟ ۔), deduplicated case-insensitively by default, and returned one per line.

  3. 3

    Review & copy

    Tick Case-sensitive if capitalization variants matter, or sort A→Z to group similar openings.

Key features

InputOutput
Same line twice.Second occurrence deleted
Same line twice. (case ON)Case differences keep both
Hello!!! Hello!One 'Hello!' — repeated marks collapse first
أهلاً! أهلاً!One أهلاً! — Arabic endings respected

Privacy: your text never leaves your browser

Every Toolflect Text Tool is 100% client-side. The moment you type or paste text, it is analyzed by JavaScript running inside this browser tab. Your text is never sent to our servers, never stored in a database, and never shared with any third party or AI service.

  • No uploads, no accounts, no sign-up
  • No cookies or tracking of your text
  • Works offline once the page has loaded
  • Close the tab and your text is gone from memory

You can even verify it yourself: open your browser's developer tools, switch to the Network tab, and type into the tool — the only requests you will ever see are this page's own static files (HTML, CSS, JavaScript). Nothing you type is ever transmitted.

Frequently asked questions

How are sentence boundaries found?
The same engine as our Sentence Counter: . ! ? … ؟ ۔ 。 endings, collapsed repeats, trailing quotes absorbed and abbreviations protected.
Why one sentence per line?
Line-per-sentence makes review and re-ordering easy; paste into any editor to reflow.
Is near-duplicate detection included?
Matching is exact per sentence (with your case preference). Fuzzy similarity analysis arrives in Group 16's Text Analysis tools.
Does anything leave my browser?
No — detection and removal are entirely local.

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