Tone Changer

How to use the tone changer

Paste the message, pick the tone you want the reader to hear, and run it. The rewrite keeps every fact, name, date and request from your original and changes only how it is said. If the result overshoots, run it again or pick the neighbouring tone (Professional instead of Formal, Friendly instead of Casual).

Each request takes about 1,000 words and the free quota is 5 rewrites a day. Text is processed in memory and returned; nothing is stored.

Choosing a tone

Professional is the safe default for anything sent at work. Formal is stricter than most people need; use it when you would address the reader as “Sir/Madam”.

Worked example

Original, from a freelancer to a late-paying client:

Hi, the invoice from last month is still not paid. This is the third time I’m asking. I need the payment by Friday or I’ll have to stop work on the project.

Professional:

Hi Priya, I wanted to follow up on last month’s invoice, which is still outstanding. I have raised this twice before, so I would appreciate payment by Friday. If it is not received by then, I will need to pause work on the project until the account is settled. Thanks for your understanding.

Empathetic:

Hi Priya, I know things have been busy on your side, so I wanted to check in about last month’s invoice, which is still unpaid. I have mentioned it a couple of times and would be grateful if it could be cleared by Friday. If that is not possible, I will need to pause the project until it is settled, which I would rather avoid. Let me know if anything is holding it up.

Confident:

Hi Priya, last month’s invoice remains unpaid despite two reminders. Please arrange payment by Friday. Work on the project will pause after that date until the invoice is settled.

Same facts, same deadline, same consequence; a completely different experience for the reader.

When to use it, and when not to

Use it when you know what to say but not how to say it: replying to an angry customer, asking a professor for an extension, or turning bullet notes into a polite email. Non-native writers often find the Professional and Formal tones useful for learning the conventional phrasing of English business email.

Do not use it to disguise the content of a message. A threat rewritten as Friendly is still a threat, and readers notice when warmth is not backed by substance. Do not use it on someone else’s words, such as a quotation or a legal notice.

Tips

• State who the reader is at the top of your input (“To my manager:”) if it is not obvious; the rewrite pitches itself accordingly.
• Keep the input short. A long email in a single tone can become monotonous.
• If the output is too long, try Casual or Confident; both tend to trim.
• Check greetings and sign-offs. The model may add “Best regards” where your team writes “Cheers”.

Limitations

Changing tone changes nuance, and nuance is where meaning lives. Empathetic mode can soften a firm deadline into a suggestion; Confident mode can remove a hedge you included on purpose. Politeness conventions differ across regions, so a Friendly email calibrated for one country may read as too familiar in another. Always re-read the output as if you were the recipient and restore any wording that mattered. The tool cannot judge whether a tone is appropriate for your situation; that decision stays with you.

Read next

• How to Write a Professional Email With AI (Not Like a Bot) — A four-step workflow for drafting emails with ChatGPT and fixing the tone, with before/after templates for follow-ups, complaints and requests.

Frequently asked questions