Overall read
Ready for analysis
Low friction
Paste a message to see how it sounds before you send it. The analyzer runs locally in your browser.
Free Tool
Free Message Tone Analyzer
A message tone analyzer checks how your writing is likely to come across, such as friendly, formal, urgent, or passive-aggressive. This free tone analyzer scores the signals in your text and suggests clearer rewrites before you hit send.
Use this message tone checker as an email tone analyzer, communication tone detector, or text tone analyzer for support replies, follow-ups, escalations, and internal updates.
Analyze your draft instantly
Paste a customer reply, follow-up email, or internal note. The analyzer runs locally with no external API calls.
Start with one of the preset drafts below or paste your own message.
Private by default
Try a preset
Rewrite tips
Rule-based suggestions to help you tune the message before sending.
- Try a preset sample to see how the tone analyzer catches friendly, urgent, and passive-aggressive phrasing.
- Longer messages give the communication tone detector more context to score accurately.
Readability
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Paste text to score readability.
Sentence length
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Average words per sentence across the draft.
Friction
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A blend of passive-aggressive, sarcastic, and angry signals.
Tone breakdown
Each score reflects the visible signals the tone checker found.
Friendly
Warm, approachable, and considerate.
0%
Professional
Clear, respectful, and work-appropriate.
0%
Formal
Polished, restrained, and conventionally businesslike.
0%
Casual
Relaxed, conversational, and informal.
0%
Urgent
Time-sensitive and pushing for quick action.
0%
Passive-aggressive
Indirectly critical or carrying hidden frustration.
0%
Sarcastic
Ironic or dismissive in a way that can be misunderstood.
0%
Angry
Frustrated, sharp, or openly negative.
0%
Why it reads that way
The tone analyzer uses the wording, punctuation, pacing, and readability cues below.
- Paste a message to reveal the tone signals behind the score.
Suggested rewrites
Rewrite the same idea with a better tone
These versions are generated client-side from the text you pasted. Use them as a starting point, then edit the wording to match your exact context.
Paste a draft to unlock rewrite suggestions.
You will get warmer, more professional, and shorter options instantly.
How to use it
Check your tone in under a minute
This communication tone detector is built for quick reviews right before you send a message.
Step 1
Paste your draft into the tone analyzer.
Step 2
Review the detected tones, readability score, and friction signals.
Step 3
Use the rewrite suggestions to make the message warmer, clearer, or more professional.
Step 4
Copy the version that sounds right before you hit send.
Frequently asked questions
Common questions about message tone analysis, readability, and safer rewrites.
What does a message tone analyzer do?
A message tone analyzer checks the words, punctuation, sentence structure, and readability of your draft to estimate how it may come across. This tool highlights tones such as friendly, formal, urgent, passive-aggressive, sarcastic, angry, casual, and professional before you send the message.
Is this an email tone analyzer or can it check other messages too?
It works as an email tone analyzer, text tone analyzer, and general communication tone detector. You can paste support replies, Slack messages, internal notes, follow-ups, customer emails, or almost any short message you want to review.
How does the tone checker detect passive-aggressive or urgent language?
The analyzer uses rule-based scoring. It looks for phrases such as 'per my last email', repeated punctuation, all-caps words, blame-heavy wording, time-pressure words, and other signals that often make a message feel sharper or more urgent than intended.
Does ChatSpark store the message I paste here?
No. The tool runs entirely in your browser and does not make external API calls. Your message stays on your device unless you choose to copy it elsewhere yourself.
How can I improve the tone of a professional message?
Start by removing blame-heavy phrases, replacing emotionally loaded words with facts, and stating the next step clearly. A short greeting, one clear request, and a calm closing usually make a message sound more professional and easier to act on.