RewriteBar: macOS AI Writing Assistant for Grammar, Translation & Productivity

4 min read Original article ↗

See how RewriteBar transforms your writing with AI-powered

Open Text With RewriteBar

Trigger RewriteBar with a simple keyboard shortcut. The main window will load your current selection and you can choose from available actions in a clear layout, allowing for quick navigation with either mouse or keyboard.

Command Menu Interface

Fix Grammar and Spelling

Instantly correct grammar and spelling errors before sending messages. The AI understands context and fixes all errors at once, catching mistakes that other tools might miss.

Translate to 500+ Languages

Translate text directly inside your current app. It works with words, sentences, or even code across more than 500 supported languages.

For example:

  • English -> German
  • UK English -> US English
  • English -> Yoda-style

Use Personalized Actions

Create your own actions to match your needs. Choose one of the available presets and customize them to your own needs.

Use Personalized Actions

Compare Your Changes

Review your rewritten text side by side with the original. Compare line by line or word by word to see exactly what changed.

Compare Your Changes

Run Multiple Actions in One Flow

Combine several actions to transform your text step by step — expand it, add emojis, translate, or rewrite titles, all in one smooth sequence.

PopClip Integration

Install the RewriteBar extension and trigger RewriteBar directly from the PopClip menu. RewriteBar offers multiple snippets to either trigger commands or open a selection.

Keyboard Shortcuts

Use keyboard shortcuts to trigger RewriteBar and apply actions with keyboard controls. This allows you to enhance your efficiency substantially.

Keyboard Shortcuts For Maximum Productivity

Works With Local AI Models

Use offline AI Models for maximum privacy and speed.

Supported Providers:

  • Ollama
  • LM Studio
  • Apple Intelligence
  • Osaurus

Use Local AI Models

Go beyond grammar and spelling. Create custom workflows that fit your writing style — from generating lorem ipsum text to transforming action items into clear user stories.

RewriteBar brings AI-powered improvements to any workflow — from debugging to storytelling.

Use Cases for Daily Writer

Fix Grammar & Punctuation

Editing

Highlight your draft and fix all grammar errors.

Fix grammar & SpellingCorrect punctuation

Adjust Tone for Publication

Tone

Rewrite text to match formal, conversational, or editorial tone.

Adjust toneRewrite for clarity

Expand Short Paragraphs

Expansion

Select a brief paragraph and expand it into a full section.

Expand textMaintain style

Summarize Research Notes

Summarization

Turn long reference material into a concise preparation summary.

Summarize textExtract key insights

Generate Catchy Headlines

Creativity

Select your topic or title and generate multiple headline options.

Generate title ideasMake engaging

Polish Articles & Blog Posts

Editing

Rewrite rough drafts for better flow and readability.

Polish writingSimplify phrasing

Use RewriteBar in Your Favorite Applications

You can use RewriteBar in any Application with a text input. So you can directly rewrite, edit, and improve your writing in you open application without losing focus.

Choose from 500+ models across 37+ AI providers - including local options like Ollama and Apple Intelligence.

RewriteBar complements the tools you already use — from ChatGPT and voice dictation apps to Grammarly — without switching windows or breaking your flow.

ChatGPT + RewriteBar

Refine prompts or polish AI‑generated text instantly.

Generate ideas in ChatGPT, then use RewriteBar to smooth tone, fix grammar, or rewrite entire sections with one shortcut.

Voice Dictation + RewriteBar

Turn spoken thoughts into clean, formatted writing.

Use Mac’s built‑in Dictation or tools like Whisper / MacWhisper — RewriteBar instantly formats and refines your transcribed text.

Grammarly + RewriteBar

Perfect grammar meets better flow.

Grammarly catches small mistakes live — RewriteBar improves full sentences, tone, and clarity once you’re ready to refine.

RewriteBar enhances your favorite AI tools - it doesn’t replace them.

Purchase Once. Own Forever.

All licenses include the full app. Pay once, then add extra devices or RewriteBar Gateway anytime.

Trial

Try it for free

1 device

Free

  • 1 Active Device
  • 35,000 Credits (One-Time)
  • BYOK
  • Third Party Providers

Standard

One-time license with cloud credits and API key support.

1 device

  • 1 Active Device
  • 35,000 Credits (One-Time)
  • Unlimited App Updates
  • Third Party Providers
  • BYOK
  • Local AI Providers

Best value

Pro

One-time license with RewriteBar Gateway Subscription for 1 year.

3 devicesAI Gateway included

  • 3 Active Devices
  • 3 Million Credits (Monthly)
  • Unlimited App Updates
  • Third Party Providers
  • BYOK
  • Local AI Providers
  • 1 Year RewriteBar Gateway Subscription

Optional Add-Ons

Extra devices or RewriteBar Cloud Subscription.

Extra Device

Add one Active Device to your license.

1 deviceAdd-on

  • Add 1 Active Device to your license
  • For Standard or Pro licenses

RewriteBar Gateway

Use RewriteBar Gateway as your AI provider without your own API key.

  • Access 43 AI models
  • 3 Million Credits (Monthly)
  • Premium Models Included

Loved by Those
Who Write, Build, and Create.

Discover how creators around the world use RewriteBar to write better and stay in flow.

Everything you need to write faster, clearer, and smarter — all in one place.

Portrait of the founder

About the founder

Hi — I’m Mathias. I built RewriteBar because I wanted an AI writing assistant that lives in the macOS menu bar and fits into real workflows (email, docs, tickets, and everything in-between).

  • Pragmatic focus: speed, reliability, and actions that feel like native macOS tools.
  • Built in public-ish: ship improvements fast, listen to feedback, iterate.
  • Made for people who write all day: founders, PMs, support, and developers.

Frequently Asked Questions

Your Questions, Answered

Have a question? Contact me on Twitter or by email.

Work Smarter. Write Sharper.

Download RewriteBar today and see why our users love RewriteBar over the competition. Start your free trial with no credit card required.

Get 35,000 free credits • No credit card required • App size: 25 MB