Duplicate Sentences in Text

Detect repeated sentences quickly with the Duplicate Sentences in Text Tool. Scan any text for recurring lines with options for punctuation stripping, whitespace normalization, and case sensitivity. Includes live preview, import/export, and output count.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total duplicate sentences: 0
Options
Case sensitive
Normalize whitespace
Ignore punctuation

How to Use:

  1. Paste or import your text into the Input Text box.
  2. Choose your options:
    • Case sensitive
    • Normalize whitespace
    • Ignore punctuation
  3. View the live list in Duplicate Sentences Output.
  4. Use Copy Output or Export to File to save.
  5. Click Clear All to reset the tool.

What Duplicate Sentences in Text Tool Can Do:

  • Finds duplicate full sentences in text
  • Options to clean formatting before comparison
  • Tracks how many times each sentence occurs
  • Displays count and formatted list instantly
  • Supports file import, live updates, and exports

Example:

Input:

The bird flew away. It was a sunny day. The bird flew away. The cat purred. It was a sunny day.

Options: Case Sensitive: Off, Normalize Whitespace: On, Ignore Punctuation: Off

Output:

The bird flew away. (2)
It was a sunny day. (2)

Common Use Cases:

Ideal for identifying repeated ideas or redundant lines in articles, stories, chat logs, and copied content. Helps streamline editing, avoid repetition, and ensure clarity in both professional and creative writing.

Useful Tools & Suggestions:

If you’re duplicating sentences, Duplicate Paragraphs in Text is a helpful follow-up if you want to scale up and repeat entire blocks instead. To keep things readable after duplication, Normalize Text Spacing can clean up any irregular breaks or formatting issues. It’s great for generating test content, mockups, or just experimenting with sentence structure.

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