Formality Checker
Analyze how formal or informal your writing is. Get a formality score and detailed breakdown.
Your Text
Formality is analyzed in real-time
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What Is Formality Checker?
A formality checker analyzes the tone and register of your writing, scoring it on a scale from casual to very formal. It measures linguistic signals — contraction usage, passive voice frequency, average word length, sentence complexity, and informal vocabulary — to determine whether your text matches the formality level your audience expects.
Tone mismatches are one of the most common writing problems and one of the hardest to self-diagnose. An email to your CEO that reads like a text to a friend, or an academic paper peppered with conversational filler words, creates friction with readers even when the content is solid. A formality checker makes this invisible dimension of writing visible and measurable.
Our formality checker processes your text in real-time as you type, giving you an instant formality score from 0 (very casual) to 100 (very formal), along with a detailed breakdown of the linguistic features driving that score — including specific informal words found in your text.
How Formality Checker Works
Step 1: Type or Paste Your Text
Enter the text you want to analyze — an email draft, essay, cover letter, or any writing where tone matters. The analysis updates in real-time as you type, so you can see the formality score change as you edit.
Step 2: Read Your Formality Score
The tool assigns a score from 0 to 100 and classifies your text as Casual, Conversational, Neutral, Formal, or Very Formal. The score reflects a weighted combination of linguistic formality signals in your text.
Step 3: Review the Breakdown
Four metric cards show contraction count, passive voice instances, average word length, and average sentence length. Below them, any informal words found in your text are highlighted as tags so you can decide which to replace.
Step 4: Adjust Your Writing
Edit your text directly in the tool to raise or lower formality. Remove contractions and informal words to increase formality; shorten sentences and use simpler vocabulary to make text more conversational. Watch the score update in real-time.
Key Features
Real-Time Tone Scoring
The formality score updates instantly as you type — no button clicks needed. This lets you experiment with word choices and see their immediate impact on tone, making it a live editing tool rather than a batch analyzer.
Register Classification
Text is classified into five register levels: Casual, Conversational, Neutral, Formal, and Very Formal. Each level corresponds to a score range and maps to real-world contexts — casual for texts, formal for business correspondence, very formal for legal or academic writing.
Informal Word Detection
Identifies specific informal words and phrases in your text — slang like "gonna" and "kinda," filler words like "basically" and "literally," and text speak like "btw" and "tbh." Each flagged word is shown as a tag you can address individually.
Linguistic Feature Breakdown
Shows the four key metrics that drive formality: contraction count (contractions lower formality), passive voice usage (passive raises formality), average word length (longer words signal formality), and average sentence length (longer sentences signal complexity).
Who Should Use This
Anyone who writes for different audiences needs to calibrate tone. A formality checker turns an intuitive judgment into a measurable score.
Students & Academics
Academic writing requires formal register — no contractions, no slang, measured sentence structures. Run your essay through the formality checker to verify it meets academic tone expectations before submission.
Business Professionals
The right formality level for an email to your team is different from a proposal to a client. Use the checker to calibrate tone for each audience — conversational for internal comms, formal for external stakeholders.
Content Writers & Marketers
Brand voice guidelines often specify a target tone. A formality checker gives you a quantitative measure to ensure every piece of content hits the right register, whether that is friendly-casual for social media or authoritative-formal for whitepapers.
Non-Native English Speakers
Formality registers in English are subtle and hard to learn from textbooks alone. A formality checker provides instant feedback on whether your writing matches the tone expected in professional, academic, or casual English contexts.
Formality Checker vs Guessing Your Tone
Most writers judge their own tone by feel — and most overestimate how formal their writing sounds. Contractions, filler words, and casual phrasing creep into professional writing without the writer noticing, because those patterns feel natural in everyday speech. A formality checker measures what your text actually contains, not what you think it contains.
Browser tools and basic grammar checkers don't analyze formality at all. They check whether your words are spelled correctly and your sentences are grammatically valid, but a grammatically perfect sentence can still be inappropriately casual for its context. Formality analysis fills a gap that other writing tools ignore entirely.
The real-time scoring makes this tool especially useful during editing. Instead of writing a draft and then wondering if the tone is right, you can watch the formality score shift as you replace "gonna" with "going to" or expand a contraction. This immediate feedback loop helps you develop an intuition for register that carries over into all your writing.
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