Text Cleaner Offline by v3

Text Cleaner Offline is a lightweight text-processing tool that helps you clean and format text directly from the Firefox toolbar.

All text processing is performed locally inside the extension. Your text is not uploaded, stored, tracked, or transmitted.

• Remove unnecessary spaces and tabs.
• Replace multiple spaces with a single space.
• Remove repeated blank lines.
• Convert text to lowercase.
• Convert text to uppercase.
• Convert text to title case.
• Count words and characters.
• Copy the processed result to the clipboard.
• Work completely offline.
• No account or registration is required.

1. Click the Text Cleaner Offline icon on the Firefox toolbar.
2. Paste or type text into the input area.
3. Select the required cleaning or formatting action.
4. Review the processed result.
5. Click Copy to place the result on your clipboard.

This function removes repeated spaces and tabs while preserving readable text formatting.


This function removes unnecessary empty lines from the entered text.


This function converts all supported letters to lowercase.


This function converts all supported letters to uppercase.


This function capitalizes words to create title-style text. Results may vary for abbreviations, names, and language-specific capitalization rules.


Text Cleaner Offline does not collect, record, store, transmit, sell, or share the text entered by users.

The extension only processes text that the user manually enters or pastes into the popup. It does not automatically read text from websites, forms, documents, or open tabs.

The extension does not access browsing history, cookies, passwords, personal information, or account data.


The extension does not request access to websites and does not use content scripts, remote code, analytics services, advertising services, or external APIs.

Clipboard access is used only when the user clicks the Copy button.


All text-processing functions run locally inside Firefox. An Internet connection is not required.