RewriteCmd

RewriteCmd is a macOS application that lets you rewrite text anywhere on your computer using AI. Instead of copying and pasting into a browser tab, you simply select text in any application—whether it's email, Slack, Notion, or your code editor—and press a keyboard shortcut (⌘⇧R by default). The tool instantly replaces your selected text with an AI-corrected version, fixing spelling, grammar, and improving clarity without disrupting your workflow.

The tool works with your own API keys from major AI providers including Claude, OpenAI, and Mistral, ensuring your data doesn't pass through any third-party servers. API keys are stored securely in macOS Keychain with system-level encryption. Beyond basic correction, RewriteCmd supports custom instructions that you can assign to specific keyboard shortcuts—like translating to English, making text more formal, adding emojis, or converting to bullet points.

RewriteCmd is ideal for Mac users who write regularly across different applications and want to improve their writing without context switching. It's particularly useful for professionals crafting emails, content creators refining social media posts, and anyone who needs quick text transformation without leaving their current application. The free version includes basic functionality, while paid tiers unlock more custom instruction shortcuts and advanced features.