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Free AI-powered grammar checker & translator. Grammarly alternative with Claude & OpenAI. 15+ languages, instant corrections. GrammarPeace -- Free Open Source Grammar Checker (Grammarly Alternative) Why pay $15/month for Grammarly? GrammarPeace does the same thing -- grammar checking, tone rewriting, and translation -- powered by AI models like Claude, GPT, and Llama. Completely free to use. Fully open source. ✨ Why people switch to GrammarPeace 💰 It's free. Use OpenRouter or Groq at no cost, no credit card needed. Or bring your own API key for pennies a month. 🤖 Pick your AI. Works with Claude, OpenAI, Groq, Cerebras, Ollama, or any OpenAI-compatible provider. 🔒 Your writing stays private. No accounts, no tracking, no data collection. API keys are stored locally on your device. 📖 Fully open source. Every line of code is on GitHub. See exactly what it does. 🛠️ What it does ✅ Check grammar -- Fix spelling, grammar, and punctuation instantly ✍️ Improve your writing -- Make text clearer without changing your voice 🎭 Rewrite by tone -- Switch between Professional, Casual, Friendly, Formal, or Concise 🌍 Translate -- Convert between 15+ languages in one click 💬 Works in 15+ languages -- Not just English 🌐 Works almost everywhere -- Gmail, Slack, Twitter, LinkedIn, and any website ⚡ How it works 1️⃣ Select any text on a webpage 2️⃣ Click the peace sign button 3️⃣ Pick Check, Improve, or Translate 4️⃣ One click to apply 🔌 Supported AI providers ☁️ OpenRouter (free, no credit card needed) ⚡ Groq (free, ultra-fast Llama models) 🚀 Cerebras (free, lightning-fast inference) 🧠 OpenAI (GPT models) 🟠 Anthropic Claude (Haiku 4.5) 💻 Ollama (run locally, 100% offline) 🔧 Any OpenAI-compatible API 🌎 Supported languages English, Spanish, French, German, Italian, Portuguese, Russian, Japanese, Korean, Chinese, Arabic, Hindi, Turkish, Dutch, Polish 💸 What it actually costs (heavy user, 100 checks/day) ❌ Grammarly: $180/year ✅ GrammarPeace + OpenRouter or Groq: $0/year ✅ GrammarPeace + OpenAI: ~$1/year ✅ GrammarPeace + Claude: ~$11/year 🚀 Get started in 30 seconds. Install the extension, choose a free provider (or add your API key), and you're done.