Claude RTL Responder is a Firefox extension designed to improve the usability of Claude.ai for Arabic-speaking users. This tool automatically detects Arabic text and applies the correct right-to-left (RTL) formatting, ensuring that mixed content, including Arabic, English, and code, is handled intelligently. The extension preserves left-to-right (LTR) formatting for technical content and code blocks, making it versatile for various applications.

Users can fully customize their experience with options for font size, line spacing, and visual indicators. Keyboard shortcuts enhance accessibility, while a bilingual interface supports both Arabic and English. Additionally, the extension prioritizes user privacy by employing local storage and no tracking. Claude RTL Responder requires Firefox version 109 or higher and is open-source, allowing for community contributions and transparency.