Does it work in every Mac app?

Yes, Echoo works system-wide in any app that supports text selection - Mail, Slack, Notes, VS Code, Chrome, and more.

Echoo is 100% free and open source. You only need an API key from your preferred AI provider (Google Gemini has a free tier).

Does my text leave my Mac?

Your text goes directly to your configured AI provider (OpenAI, Anthropic, Google, etc.). Echoo never sees or stores your text.

Can I use local AI models?

Yes! Echoo supports Ollama, LocalAI, and LiteLLM for 100% offline grammar fixing.

Fix Grammar on Mac with AI Shortcuts

Select text, press a shortcut, and your grammar is fixed instantly - right where you're working.

How It Works

Download Echoo

Install Echoo on your Mac. It runs in your menu bar and works system-wide.

Select your text

Highlight the text you want to fix in any app - Mail, Slack, Notes, or anywhere else.

Press your shortcut

Hit your configured keyboard shortcut (e.g., ⌥G) to trigger the grammar fix command.

Text is corrected instantly

Echoo sends your text to the AI provider, gets the corrected version, and replaces it in place.

Commands for This Use Case

Professional Tone

Rewrite for professional context - emails, Slack, docs.

AnthropicHaiku 4.5

Casual Tone

Rewrite in natural everyday English that doesn't feel AI-edited.

OpenAIGPT 5.2

Frequently Asked Questions

Why I Built This

Since the AI revolution began, my workflow changed completely - but not entirely for the better. Here is why I built Echoo.

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OpenAI Integration

Connect Echoo to OpenAI GPT models for powerful AI text transformation on macOS. Use GPT-4, GPT-5, and more with keyboard shortcuts.

Anthropic Integration

Connect Echoo to Anthropic Claude models for thoughtful, nuanced AI text transformation on macOS. Claude Opus, Sonnet, and Haiku.

Google Gemini Integration

Connect Echoo to Google Gemini AI for free, fast text transformation on macOS. Gemini Flash Lite offers a generous free tier.

All use cases All comparisons For your role

Ready to Try It?

Download Echoo for free and start transforming text with AI shortcuts.

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