The same message lands differently depending on its tone. A blunt note to a colleague needs softening; a rambling paragraph needs tightening; a casual draft needs polishing before it goes to a client. This tool rewrites any text into the tone you choose using your own OpenAI or Anthropic key, entirely in your browser.
How it works
Pick a provider and model, paste your API key, drop in your text, and choose one of six target tones. The tool constructs a rewrite prompt that names the exact register you want and instructs the model to keep your meaning, facts, names, and numbers intact — only the voice changes. It sends one direct request to the provider and returns the rewritten text to copy.
For Anthropic, the request includes the official direct-browser-access header so it works straight from the page.
The six tones
- Formal — no contractions, complete sentences, ceremonial.
- Casual — relaxed, contractions, like writing to a friend.
- Friendly — warm, positive, approachable.
- Persuasive — benefit-led with a clear call to action.
- Professional — clear, courteous, confident; ideal for work email.
- Concise — same meaning, fewer words, no filler.
Tips
- Rewrite in two passes for tricky messages: tighten with Concise first, then shift register.
- Keep the original handy and compare — tone rewrites occasionally drop a caveat you wanted to keep.
- Cheaper models handle tone rewriting easily, so cost per rewrite is negligible.