Hamsoo (هم‌سو) by NaxonM

RTL and Persian typography helper for AI chat sites (ChatGPT, Claude, Gemini, DeepSeek, Perplexity, and more). Fixes RTL alignment, converts digits, and adds custom Persian fonts.

5 (1 review)

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About this extension

Hamsoo (همسو) is a free, open-source, and privacy-first browser extension designed to bring beautiful Persian & RTL typography to modern AI chat interfaces.

↔ Smart Automatic RTL & Bidi Alignment: Automatically detects Persian text direction without messing up code blocks or English words.
✒ 6 Built-in Open Source Persian Fonts: Vazirmatn, Estedad, Sahel, Shabnam, Samim, and Gandom.
🎨 Custom Font Uploads: Load any .woff2, .ttf, or .otf font directly from your computer.
🔍 Readability Controls: Customize font size, line height, font weight, letter spacing, text alignment (right/justify), and line measure per site.
🔢 Persian Digits & Punctuation: Option to convert numbers to Persian (۱۲۳) and fix punctuation orientation while typing.
🔒 100% Private & Local: Processing is done strictly inside your browser. No remote servers, analytics, or tracking.
⌨ Keyboard Shortcut: Quickly toggle on/off using Alt+Shift+R.

ChatGPT, Claude, Gemini, DeepSeek, Grok, Perplexity, Copilot, Google AI Studio, Qwen, Kimi, Poe, NotebookLM — plus any custom site you add via the popup.

Source code & Documentation: https://github.com/NaxonM/hamsoo

Rated 5 by 1 reviewer

Permissions and data

Required permissions:

Access your data for chatgpt.com
Access your data for claude.ai
Access your data for gemini.google.com
Access your data for chat.deepseek.com
Access your data for grok.com
Access your data for www.perplexity.ai
Access your data for perplexity.ai
Access your data for copilot.microsoft.com
Access your data for aistudio.google.com
Access your data for chat.qwen.ai
Access your data for www.kimi.com
Access your data for kimi.moonshot.cn
Access your data for poe.com
Access your data for notebooklm.google.com

Data collection:

The developer says this extension doesn't require data collection.