Speaking naturally is fast, but raw dictation often needs polish. Filler words, run-on sentences, and informal phrasing are normal when speaking — but not ideal for professional writing. Whisperer's AI post-processing fixes this automatically, and it runs entirely on your Mac.
What Is AI Post-Processing?#
After Whisperer transcribes your speech, the text passes through an optional AI step before being inserted into your app. An on-device LLM transforms your raw dictation into polished, professional text.
The entire pipeline is offline. No API keys, no per-word charges, no cloud latency, no privacy concerns.
The 10 Built-In Modes#
Rewrite#
Cleans up transcribed speech into professional written text. Removes filler words, fixes sentence structure, and improves clarity.
Before: "so basically what I was thinking is that we should probably go ahead and implement the new caching layer because it would make things faster"
After: "We should implement the new caching layer to improve performance."
Translate#
Translates dictation to any target language, entirely offline. Speak in English, get German. Or any other language combination.
Before: "Please send me the quarterly report by Friday afternoon."
After: "Bitte senden Sie mir den Quartalsbericht bis Freitagnachmittag."
Format#
Applies Markdown formatting with headers, bullets, and structure.
Before: "the project has three phases first research second development third deployment each phase takes about two weeks"
After:
# Project Phases
1. **Research** - 2 weeks
2. **Development** - 2 weeks
3. **Deployment** - 2 weeks
Summarize#
Condenses long dictation into concise key points.
Grammar#
Fixes grammar and punctuation without changing meaning. Perfect for quick notes that need light cleanup.
List Format#
Detects spoken enumerations and formats them as proper lists.
Coding#
Rewrites dictation as technical documentation or code comments. Great for dictating function descriptions.
Email#
Formats as a professional email with greeting and sign-off. Dictate the content, get a polished email.
Creative#
Enhances with vivid, engaging language. Useful for marketing copy or creative writing.
Custom#
Write your own system prompt for any transformation. The LLM follows your instructions to transform the text however you need.
Rewrite Mode — Beyond Dictation#
Rewrite Mode goes further than post-processing new dictation. Press Option+Shift+Tab to rewrite any text on your clipboard through the active AI mode — no recording needed.
- Select text in any app
- Copy it (Cmd+C)
- Press Option+Shift+Tab
- The AI-processed version replaces your clipboard
This is perfect for cleaning up quick notes, reformatting existing text, or translating passages you've already written.
AI Enhancement History#
Every AI transformation is stored with before/after text in your transcription history. Made a mistake? Undo any AI enhancement and revert to the original transcription with one click.
Privacy First#
The on-device LLM runs entirely on your Mac. Your text never leaves your device. No API keys to manage, no subscription fees, no cloud latency. The same privacy guarantee as Whisperer's transcription engine.
Getting Started#
- Download Whisperer from the Mac App Store
- Open Settings and enable AI Post-Processing
- Choose your preferred AI mode
- Dictate and let the AI handle the polish
Learn more about all AI modes on the AI Writing feature page.