RTL Extension by Ali Bahadori
Change direction of textAutomatically applies right-to-left text direction and the Vazirmatn Persian font to Claude, ChatGPT, and Gemini — keeping Persian text readable and consistent without affecting English text or code blocks.
Extension Metadata
About this extension
Rastnevis is a lightweight Firefox extension that improves the experience of reading and writing Persian in AI chatbots.
When you open Claude.ai, ChatGPT, or Gemini, the extension automatically:
Renders Persian and Arabic text using the Vazirmatn font with right-to-left (RTL) direction, significantly improving readability for Persian content.
Leaves English text within the same message untouched, preserving the site's original font for Latin characters, so you don't need to manually switch between languages.
Keeps code blocks and monospace content always left-to-right (LTR), since code should always be read LTR even in the middle of a Persian response.
Lets you toggle the extension on or off at any time from the toolbar icon, with the state persisted across browser restarts.
This extension does not collect, store, or transmit any user data or browsing activity; all changes are applied locally to the page's display only.
When you open Claude.ai, ChatGPT, or Gemini, the extension automatically:
Renders Persian and Arabic text using the Vazirmatn font with right-to-left (RTL) direction, significantly improving readability for Persian content.
Leaves English text within the same message untouched, preserving the site's original font for Latin characters, so you don't need to manually switch between languages.
Keeps code blocks and monospace content always left-to-right (LTR), since code should always be read LTR even in the middle of a Persian response.
Lets you toggle the extension on or off at any time from the toolbar icon, with the state persisted across browser restarts.
This extension does not collect, store, or transmit any user data or browsing activity; all changes are applied locally to the page's display only.
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Permissions and data
Required permissions:
- Access your data for gemini.google.com
- Access your data for chatgpt.com
- Access your data for claude.ai
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.2
- Size
- 13.18 KB
- Last updated
- 5 days ago (Jun 17, 2026)
- Related Categories
- License
- MIT License
- Version History
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