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Fluentsmith

AI Tone Changer

Rewrite any text in the tone you need — Formal, Casual, Direct, Persuasive, or Summary — powered by AI.

AI Tone Changer

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Tone

Polished and structured. Example: “Hello, I sent the document yesterday. Could you please confirm that you received it?”

Free rewrites come back in English.

No draft history stored

Fluentsmith does not save your drafts in its application database.

Paddle handles payment

Our reseller and merchant of record charges you.

14-day refund

On every purchase, no questions asked.

No account, no password

The free plan needs no email and no sign-up.

Worked example

One rewrite, before and after

A demonstration of the rewrite this page is set up for. It is an illustration of the tool, not a customer quote.

Tone: Formal

Before

cant make the call tomorrow, something came up, sorry!!

After

I am sorry, but I will not be able to join tomorrow's call because something has come up.

Why this page

Three things it does well

Five tones, one text

Run the same draft through Formal, Casual, Direct, Persuasive and Summary and keep the version that fits the reader.

Your facts stay put

The instructions prioritize preserving dates, numbers, names, and commitments. Review the output before using it.

Grammar fixed on the way

Subject–verb agreement, articles, and tense are corrected as part of every rewrite, in every tone.

When people use it

Typical moments

  • Softening a message you wrote while annoyed
  • Turning notes into something you can send
  • Making a long update short enough to read
  • Matching the tone your team uses in writing

Questions about this tool

What is the difference between the five tones?
Formal is polished and structured. Casual is warm and conversational. Direct leads with the point and cuts unnecessary wording while preserving uncertainty. Persuasive highlights the facts you gave as proof. Summary is shorter: it keeps the facts and cuts repetition and filler.
Can I change the tone of text that is not an email?
Yes. Slack messages, LinkedIn posts, text messages, business letters, and captions all work — there are dedicated pages for each under Tools.
How much does Fluentsmith cost?
1 rewrite a day is free, in English, with no sign-up. Fluentsmith Pro is $19 a month, with unlimited rewrites in 6 languages and a 14-day refund.