[NTTP]

Tone Rewriter

Paste any email, message, paragraph, or post and shift its tone, more formal, more casual, warmer, firmer, more concise, or more diplomatic, without losing what it actually says.

Any kind of text works: an email, a message, a paragraph, a social post.

Optional

Optional. e.g. "my manager", "a client I do not know well", "a group chat with old friends".

Free to try, no sign-up needed

Your text isn't stored. It's sent to Anthropic to generate your result, then discarded. Privacy

Prefer to write it yourself? Use the free prompt.

New to this? Read the guide.

What it produces

Real output from this tool, not a mock-up.

What went in

The text to rewrite
No, we can't do that by Friday. You've asked for three extra things this week already and every time it pushes everything else back. If you want this by Friday then something else has to drop, so tell me what.
Target tone
Diplomatic
Who it is for
A colleague in another team who keeps sending last-minute requests. I want to keep the boundary but not damage the relationship.

What came back

I don't think we can make Friday work for this one. This is the third extra ask this week, and each time something gets added, it pushes the rest of our work back. If Friday's a hard deadline, we'd need to drop something else to make room, so let me know what you'd want to bump.

When to use it

Use this when the message says the right thing in the wrong register: too blunt for the recipient, too casual for the situation, or so hedged the point disappears. It changes how it lands without changing what it commits you to.

Common questions

Will making it diplomatic make it vague?
That is the failure mode it is built to avoid. Diplomatic here means the boundary survives and the edge comes off, not that the answer becomes maybe. If a rewrite has lost your actual position, it has not worked and you should run it again with the context box filled in.
What is the difference between the six tones?
Formal and casual move the register. Warmer and firmer move the relationship. Concise cuts length without dropping points, and diplomatic keeps the message while removing anything that reads as an accusation. Firmer is the one people underuse.
Does it work on things other than email?
Yes. Anything you paste: a Slack message, a paragraph of a document, a social post, a review reply. It is not email-specific, though the context box helps it judge how far to go.
Is it free?
You can run it three times a day with no account. Signing in gives you renewing monthly credits, and this tool costs one credit per run with the one-click refinements included.