Email Tone Checker
Know exactly how your email will land before you send it
Analyze the emotional tone of any email draft before it leaves your inbox. The Email Tone Checker scores your message on clarity, warmth, directness, and professionalism — and suggests edits if something sounds harsher than you intended.
How it works
Write your email
Compose as normal in any email client. Copy the text or use the inline checker (Pro).
Run the analysis
Paste into the extension panel or click Analyze. Scores across Clarity, Warmth, Directness, and Professionalism in ~3 seconds.
Fix flagged phrases
See which phrases drag your scores down. Pro users can auto-rewrite problem sentences.
Free vs Pro
Free
$0
5 checks/day
- Tone score analysis
Get a score for clarity, warmth, directness, and professionalism.
- 5 checks per day
Analyze up to 5 emails daily on the free tier.
- Problematic phrase flagging
Highlights specific words or phrases that are contributing to a negative tone.
Pro
$5/mo
Cancel anytime
Everything in Free, plus:
- Unlimited checks
Check every email you write without a daily cap.
- One-click rewrites
Automatically rewrite flagged sentences to improve tone while keeping your meaning.
- Gmail & Outlook integration
Tone scores appear directly in your compose window as you type.
Who this is for
Managers & Leaders
Catch passive-aggressive phrasing before it damages team morale. Send feedback that motivates, not deflates.
Client-Facing Professionals
Ensure every client email strikes the right balance of friendly and professional, especially in difficult conversations.
Remote Workers
Written communication carries all the weight of tone in remote teams. Make sure your messages read the way you mean them.
Non-Native English Speakers
Avoid accidentally rude or awkward phrasing when writing in English as a second language.
FAQ
Does it work in Gmail and Outlook?
Free tier works as a pop-up you paste your email into. Pro adds a live overlay inside Gmail and Outlook compose windows.
What does the tone score actually measure?
The AI rates your email on a 1-10 scale across four dimensions: Clarity (is it easy to understand?), Warmth (does it feel friendly?), Directness (is the ask clear?), and Professionalism (is the register appropriate?).
Does it store the emails I check?
No. Your email text is sent to the AI API for analysis and immediately discarded. We have no access to your email content.
Can I check emails I received, not just ones I'm writing?
Yes. Some users check incoming emails to understand if a terse reply was intended to be harsh or is just someone's writing style.
Is it useful for non-work emails?
Many users check important personal emails — to landlords, doctors, or family members — to make sure they communicate exactly what they intend.