Skip to main content
Every Tools

Remove Duplicate Sentences

Remove duplicate sentences from any text instantly in your browser.

Tool workspace

Deduplication runs in your browser. Nothing you paste is sent to our servers.

How it works

Paste or type text into the input. The tool splits text into sentences with the same simple .?! heuristic as the Sentence Counter, keeps the first occurrence of each sentence, and drops later duplicates while preserving order.

Comparison is case-insensitive after trimming leading/trailing whitespace on each sentence; the first original wording (including its terminator) is kept. Remaining sentences are rejoined with a single space.

Limits: abbreviations like `Mr.` or `e.g.` can create false sentence boundaries. This is not NLP—no grammar rewriting or abbreviation dictionaries.

Results update as you type (light debounce) or when you press Convert. Empty input produces an empty result—no error. Processing runs entirely in your browser.

Examples

  • Hello. How are you? Hello. Bye! → Hello. How are you? Bye!
  • Hello there. hello there. HELLO THERE. → Hello there.
  • Café ouvert. café ouvert. Done. → Café ouvert. Done.
  • (empty or spaces only) → (empty)

Privacy

Privacy: this tool processes text locally in your browser. We do not log or store what you paste. Login is not required.

FAQ

Is my text uploaded to a server?

No. Duplicate-sentence removal runs entirely in your browser. Pasted content is not sent to Nova Engine.

Do I need an account?

No. All published tools work for guests without login.

How are sentences compared?

Each sentence is trimmed, then compared case-insensitively. The first original sentence text is kept; later matches are dropped.

How are sentence boundaries detected?

The same .?! heuristic as the Sentence Counter: terminators followed by whitespace or end of text. Abbreviations can inflate splits.

Related tools