Free tool
Personal Voice
Measure how you actually write, then teach your AI assistant to draft like you.
Sentence length, in orderpunch lines
- words a sentence
- 9.1
- words a sentence
- one-line paragraphs
- 25%
- one-line paragraphs
- contractions per 100 words
- 6.4
- contractions per 100 words
Sample
Two short posts by a made-up writer, measured the same way your writing would be:
Most of my week is meetings I didn't ask for. So on Fridays I close the calendar and build the thing I've been putting off. Last Friday it was the onboarding email. It took two hours and it's the best thing I shipped all month. That's the whole trick. Protect one afternoon. Use it for the work only you can do.
Their rhythm
Each bar is one sentence, in order. Gold bars are your short punch lines. Hover a bar to read it.
- words in an average sentence
- 9.1
- words in an average sentence
- of paragraphs are one sentence
- 25%
- of paragraphs are one sentence
- contractions per 100 words
- 6.4
- contractions per 100 words
- of sentences are questions
- 8%
- of sentences are questions
- semicolons per 1,000 words
- 9.2
- semicolons per 1,000 words
- long dashes per 1,000 words
- 0
- long dashes per 1,000 words
See your own rhythm
- Paste your writing and see its rhythm instantly
- A profile starter you can copy or download
- The Personal Voice skill kit, ready for Claude, Codex or any chat assistant
Set it up where you already work
- Claude app
- On a Pro, Max, Team or Enterprise plan with code execution on, open Settings, then Features, and upload the ZIP as a custom skill.
- Claude Code or Codex
- Unzip it and move the
personal-voicefolder into~/.claude/skills/for Claude Code, or into your Codex skills folder. - Any other chat assistant
- Open the paste-in file from the ZIP and paste it at the start of a chat, or into the assistant's custom instructions.