Duplicate Sentences
Free online sentence duplicator. Repeat each sentence in your text a specified number of times.
About the Duplicate Sentences
Our free sentence duplicator repeats every sentence in your text a number of times you choose, producing an expanded block where each sentence appears multiple times in sequence. Paste your text, set how many copies you want, and the tool generates the repeated output instantly. It is useful for creating practice and dictation material, generating filler or placeholder content, stress-testing layouts and text fields, building repetition-based learning exercises, and preparing sample data. Because it works sentence by sentence, the structure of your original text is preserved while the volume grows predictably. You can copy the full result with one click. Everything runs in your browser as soon as you enter your text, so the output is immediate, there is no signup, and nothing you type leaves your device.
Features
- Duplicate each sentence a custom number of times
- Sentence detection at . ! ? boundaries
- Customizable repetition separator
- Real-time preview
How to use this tool
The Duplicate Sentences works right in your browser — no signup, no installation. Follow these steps:
- Paste or type text containing sentences to duplicate.
- Set the number of repetitions per sentence.
- Choose the separator between repetitions.
- Copy the duplicated result.
Frequently asked questions
How are sentences detected?
The shared sentence splitter recognizes ending punctuation and some common abbreviations. Trailing text without punctuation is preserved and repeated too.
How is spacing handled?
Sentence edges are trimmed. The selected separator joins repeated copies, and a space joins the sentence groups.
Using the results
Bulk text edits that would take ages by hand happen in one step with the Duplicate Sentences. It applies your changes the moment you make them, entirely in the browser, so your content stays on your device and the result is ready to copy immediately.