Email tone analyzer
Paste a draft email to see how it lands across seven tones: friendly, formal, neutral, assertive, aggressive, uncertain, and passive. Targeted flags suggest specific edits before you hit send.
How it works (and what it cannot do)
The analyzer uses a hand-curated lexicon of about 100 tone-indicating phrases, multi-word expressions, and punctuation patterns. It does not use a large language model, so it is fast, free, and runs entirely in your browser. The trade-off: it scores word choice, not intent. A satirical email could read as “friendly” because of the wording even if the meaning is cutting. Use the tool to catch the obvious tone drift, not to certify a complex message.
About the Email tone
The email tone analyser reads a draft and scores how it is likely to come across before you hit send. It breaks the writing into seven tones, friendly, formal, neutral, assertive, aggressive, uncertain, and passive, shows the dominant one, and flags patterns that often backfire, such as a wall of apologies or three exclamation marks in a row.
It is for the moment of doubt right before sending: does this read as confident or pushy, warm or curt? Paste your draft and the scores update live as you type, with no button to press. Use it to sanity-check a message to your manager, a reply to an annoyed customer, or a request you want taken seriously.
How to use it
- Paste your draft email into the editor. Scores recalculate as you type, so no Run button is needed.
- Read the dominant tone at the top of the panel with its short description of how that tone tends to land.
- Scan the tone breakdown bars to see the full mix, with aggressive shown in red and uncertain or passive in amber.
- Check the warnings beneath the editor for specific risks, such as aggressive cues, heavy apologising, or too many exclamation marks.
- Adjust wording and watch the bars shift, then stop when the dominant tone matches the impression you want to make.
- Load the sample email if you want to see a balanced friendly-and-assertive draft as a reference point.
Examples
Softening an angry reply
A draft full of "unacceptable", "again", and two exclamation marks scores high on aggressive and triggers the warning to soften before sending. Swapping "This is unacceptable!" for "This has happened twice now, so I want to understand why" drops the aggressive bar and lifts assertive.
Fixing an over-apologetic ask
"So sorry to bother you, no rush at all, whenever you get a chance" scores heavily passive with little assertive, and the tool warns the reader may read it as low confidence. Replacing the hedges with "Could you send this by Thursday?" rebalances toward a clear, assertive request.
Catching shouty capitals
Writing URGENT or ASAP in capitals nudges the aggressive score upward, since runs of three or more capital letters are treated as raised-voice cues. Lower-casing them to "urgent" keeps the urgency without the shout, which the live bars reflect immediately.
Frequently asked questions
- How does it decide the tone?
- It matches words and short phrases against a built-in lexicon, each tagged with a tone and a weight, then tallies the hits. Exclamation marks and all-capital words add to the aggressive count. A leading not or never flips a phrase's contribution.
- Does my email get sent anywhere?
- No. The analysis runs entirely in your browser as you type. Nothing is uploaded to a server, so you can safely paste sensitive or unfinished drafts.
- Why is the dominant tone blank?
- If the text has no words that match the lexicon, there is nothing to score, so no dominant tone shows. Add more of the email, or wording with clearer intent, and the breakdown fills in.
- What do the warnings mean?
- They flag four common send-regret patterns: aggressive cues worth softening, an apology-heavy passive tone, lots of hedging without a clear ask, and three or more exclamation marks. They are prompts to reconsider, not hard errors.
- Should I always aim for one tone?
- No. The healthiest professional emails are usually a blend, often friendly plus assertive: warm enough to keep the relationship, direct enough to get action. Use the mix as a guide, not a target to maximise.
Good to know
Tone scoring here is lexical, meaning it reacts to specific words and signals rather than understanding context. Sarcasm, inside jokes, and culturally specific politeness will not register, and a perfectly polite email about bad news may still read as neutral. Treat the output as a quick gut-check that surfaces obvious risks, not a verdict on whether the message is good.
The most useful habit it builds is noticing your own defaults. Many writers lean permanently passive, padding every request with apologies, or permanently blunt, cutting so much that they sound cold. Running a few real emails through the analyser shows your pattern, and once you can see it you can correct for it without the tool. When the stakes are high, a human read from a trusted colleague still beats any automated score.