Overview

RewriteBar is a lightweight, menu bar AI writing assistant designed specifically for macOS that brings AI-powered text enhancement to every application on your Mac. Originally created by a non-native English speaker to improve everyday writing, RewriteBar has evolved into a comprehensive writing toolkit supporting 500+ languages, 14+ AI providers with 500+ models, and powerful features like grammar correction, tone adjustment, translation, and custom workflows—all accessible via keyboard shortcuts from any app.

Pricing: Free (100 requests) | Monthly: $5/mo | Annual: $40/yr | One-time: $29 (BYOK)

Minimum macOS: 13.0 (Ventura)

Architecture: Apple Silicon, Intel

Key Features

System-wide AI writing assistance across all macOS applications
Support for 14+ AI providers (OpenAI, Anthropic, Google, DeepSeek, Mistral, Groq, Azure AI, and more)
Access to 500+ AI models with flexible provider selection
Grammar and spelling correction with context-aware AI insights
Translation across 500+ languages
Tone adjustment (professional, casual, punchy, friendly, etc.)
Text simplification and expansion capabilities
Custom actions and workflows for personalized tasks
PopClip integration for quick text editing
Keyboard shortcut customization for instant access
Side-by-side comparison of original vs. modified text
Workflow chaining to combine multiple actions sequentially
Local AI model support via Ollama, LM Studio, Apple Intelligence, and Osaurus
Pre-built templates: extract action items, create emails, generate summaries, format transcripts, convert case styles
Humanize AI-generated content to make it more natural
BYOK (Bring Your Own Key) for unlimited usage with personal API keys
Lightweight footprint at just 25 MB
Privacy-focused: direct communication with AI providers, no server storage
Compatible with Chrome, Figma, Notion, Word, Slack, VS Code, Discord, Teams, WhatsApp, and all text-based apps
Menu bar integration for seamless macOS workflow
One-time purchase option to avoid subscription fatigue