Idiomatic AI

About

Does your writing sometimes sound a little… off?

Non-native speakers often know what they want to say — but the sentence comes out technically correct yet awkwardly phrased. Idiomatic AI fixes that instantly.

How it works:

Select any text on a webpage and right-click → "Idiomatic AI – Make it Native", or click the toolbar icon and paste your sentence directly. In seconds, you get 3 natural rewrites:

✅ Natural (Recommended) — Everyday fluent phrasing, the way a native would actually say it
📝 Formal / Professional — Polished language for emails, reports, and business writing
💬 Casual / Conversational — Relaxed and friendly, perfect for chats and social posts
Each suggestion includes a brief explanation of why it sounds more natural — so you actually learn, not just copy.

Why install Idiomatic AI?

🌍 Works in any language — Auto-detects your input language, or lock to English, Chinese, Japanese, Korean, French, German, or Spanish
⚡ Works anywhere you type — Popup, right-click menu, or the floating inline trigger button that appears on any text field
🔒 Your API key stays local — Never stored on our servers. All requests go directly from your browser to your chosen AI provider
🤖 Your AI, your cost — Bring your own OpenAI or Anthropic key, or point it at any OpenAI-compatible custom endpoint
🎯 Zero clutter — No signup, no account, no tracking. Just open it and use it.
Supported AI Providers:

OpenAI (GPT-4o-mini) — fast and affordable
Anthropic (Claude Haiku) — great for nuanced language tasks
Custom endpoint — point to any OpenAI-compatible API (self-hosted, LiteLLM proxy, etc.)
Perfect for:

Non-native English writers (or any language)
Students writing essays or emails in a second language
Professionals crafting important messages
Anyone who wants to sound more fluent and natural