Claude RTL — Hebrew Text Fixer

A lightweight Chrome extension that auto-detects Hebrew text in Claude's chat interface and applies right-to-left (RTL) alignment.

What it does

When Claude responds in Hebrew, the text displays left-aligned (LTR) by default. This extension fixes that by:

1. Scanning the page for Hebrew text using a TreeWalker
2. Applying dir="rtl" and text-align: right to Hebrew text containers
3. Watching for new messages (including streaming responses) via MutationObserver
4. Properly handling bullet lists in RTL mode

The extension only targets text content in the chat area — it does not touch the sidebar, navigation, buttons, or input fields.

Installation

1. Download or clone this repository
2. Open chrome://extensions in Chrome
3. Enable "Developer mode" (top right toggle)
4. Click "Load unpacked"
5. Select the claude-rtl folder
6. Open claude.ai and start chatting in Hebrew

Security

This extension has been audited and is fully transparent:

Check	Result
Network calls (fetch, XHR, WebSocket)	None
Data storage (cookies, localStorage)	None
Sensitive data access (passwords, tokens)	None
Code injection (eval, innerHTML)	None
External script loading	None
Chrome API usage	None
Permissions	activeTab only
Runs on	claude.ai only

Total codebase: 208 lines across 3 files. You can read every line in under 5 minutes.

The extension:

• Does NOT send any data anywhere
• Does NOT read passwords, cookies, or personal information
• Does NOT inject external scripts
• Does NOT access other tabs or websites
• Uses the minimal activeTab permission only

Files

claude-rtl/
├── manifest.json    (23 lines — extension config, permissions)
├── content.js       (149 lines — Hebrew detection + RTL application)
├── rtl-fix.css      (36 lines — bullet list fixes for RTL)
└── icons/
    ├── icon-16.png
    ├── icon-48.png
    └── icon-128.png

How it works

The extension uses a TreeWalker to find text nodes containing Hebrew characters (Unicode range \u0590-\u05FF). When found, it applies RTL direction to the nearest block-level parent element.

Elements that are skipped:

• Sidebar and navigation (nav, aside, elements positioned < 100px from left)
• Buttons, inputs, and editable areas
• Code blocks (pre, code)
• Script and style tags

A MutationObserver watches for new content (streaming responses) and re-scans automatically.

License

MIT

Author

Built by Liraz Gershon — UX/UI Designer