Idiomatic AI

Instantly rephrase any sentence into natural, native-speaker expressions. Perfect for non-native writers & language learners.

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