Sentence case capitalizes only the first word and proper nouns. Title case capitalizes the principal words and lowercases short articles, conjunctions and prepositions. Start case capitalizes every word, including the short ones. The sentence case vs title case question matters because it decides how your headings, buttons and title tags read, and most brands ship all three by accident.
Summary
- Sentence case: “How we build brand systems that scale”
- Title case: “How We Build Brand Systems That Scale”
- Start case: “How We Build Brand Systems That Scale” with every short word capitalized too, so “A”, “Of” and “The” go up as well
- Sentence case is the safe default for interfaces, product copy and most modern brands. Title case still owns editorial headlines and North American book and article titles.
- Capitalization does not change Google rankings, but it changes pixel width and click-through rate, which is a real ranking input downstream.
Table of Contents
- What is the difference between sentence case, title case and start case?
- What other text cases will you run into?
- Which case should you use where?
- What the major style guides actually say
- Case, SEO and accessibility
- How to enforce case consistency across a brand
- Frequently asked questions
What is the difference between sentence case, title case and start case?
The three styles differ only in how many words get a capital letter. Sentence case capitalizes one word. Title case capitalizes the important ones. Start case capitalizes all of them.
| Case style | Rule | Example |
|---|---|---|
| Sentence case | Capitalize the first word and proper nouns only | The best way to run a brand refresh in Canada |
| Title case | Capitalize principal words, lowercase short articles, conjunctions and prepositions | The Best Way to Run a Brand Refresh in Canada |
| Start case | Capitalize every word regardless of length or function | The Best Way To Run A Brand Refresh In Canada |
| All caps (upper case) | Every letter capitalized | THE BEST WAY TO RUN A BRAND REFRESH IN CANADA |
| Lower case | No capitals at all | the best way to run a brand refresh in canada |
The rule most people get wrong
Title case and start case are not synonyms, and almost every online “title case converter” quietly gives you start case. True title case requires knowing a word’s grammatical function. “Off” is capitalized when it is an adverb in “Turn Off the Lights” and lowercased when it is a short preposition in some style guides. No simple script can resolve that reliably, which is why automated converters default to the crude rule of capitalizing everything over three letters.
The practical consequence is that if you rely on a converter, you are choosing start case whether you meant to or not. That is fine if you decide it deliberately and apply it everywhere. It is not fine when half your site is hand-written title case and the other half is machine-generated start case.
What counts as a “principal word” in title case
- Always capitalized: nouns, pronouns, verbs (including “Is” and “Be”), adjectives, adverbs, subordinating conjunctions
- Usually lowercased: articles (a, an, the), coordinating conjunctions (and, but, or, nor, for, so, yet), short prepositions (of, in, on, to, at, by)
- Always capitalized regardless: the first and last word of the title, and the first word after a colon
What other text cases will you run into?
Beyond the three editorial styles, there are programmatic cases you will meet in URLs, file names and code. Knowing the names saves a lot of confusion in handoff conversations between designers and developers.
| Case | Example | Where it belongs |
|---|---|---|
| camelCase | brandStyleGuide | JavaScript variables and functions |
| PascalCase | BrandStyleGuide | Class names, React components |
| snake_case | brand_style_guide | Database columns, Python |
| kebab-case | brand-style-guide | URLs, CSS classes, file names |
| SCREAMING_SNAKE_CASE | BRAND_STYLE_GUIDE | Environment variables, constants |
| Toggle or alternating case | bRaNd StYlE gUiDe | Nowhere in professional work |
The one that touches marketing directly is kebab-case. Every clean URL slug on this site uses it, because hyphens are read as word separators by search engines while underscores historically were not. If you are naming a page, name it in kebab-case and keep it short.
Which case should you use where?
Use sentence case for anything a person reads as an instruction, and title case for anything a person reads as a title. That single rule resolves about 80 percent of cases. The table below covers the rest.
| Context | Recommended case | Why |
|---|---|---|
| H1 page heading | Sentence case or title case, pick one and never mix | Consistency matters more than the choice itself |
| H2 and H3 subheadings | Sentence case | Easier to scan, reads faster, handles long questions gracefully |
| Buttons and calls to action | Sentence case | Buttons are instructions, not titles. “Get a quote” beats “Get A Quote” |
| Navigation items | Title case or sentence case, consistently | Short labels look fine either way, so follow the brand default |
| Form labels and helper text | Sentence case | Reduces visual noise on data-entry screens |
| Error and success messages | Sentence case | These are full sentences, so treat them as sentences |
| Title tag (SEO) | Title case, usually | Slightly higher perceived authority in the SERP, but test it |
| Meta description | Sentence case | It is prose, not a heading |
| Email subject lines | Sentence case | Reads as a personal message rather than a broadcast |
| Product and feature names | Title case | They are proper nouns in your product vocabulary |
| Table headers and data labels | Sentence case | Dense layouts get harder to read with extra capitals |
| Legal, footer and utility links | Sentence case | Low-emphasis text should look low-emphasis |
Buttons deserve their own rule
A button is a verb phrase telling someone what will happen when they click. “Book a call” reads like a person talking. “Book A Call” reads like a form from 2004. When Wise Media rebuilds an interface, buttons go to sentence case first, because it is the change that most reliably makes a page feel current without touching a single pixel of layout.
The exception: all caps as a design element
All caps works for eyebrow labels, small category tags, and short overline text of one to three words, usually paired with generous letter spacing. It fails for anything longer, because readers identify words partly by their outline shape, and all caps flattens every word into the same rectangle. If your paragraph is in all caps, you have made it slower to read in exchange for looking loud.
What the major style guides actually say
There is no single correct answer, which is exactly why brands need to pick one and write it down. Here is where the main guides land.
| Style guide | Headline and title convention | Common in |
|---|---|---|
| Associated Press (AP) | Title case, capitalizing the first word and principal words, lowercasing short articles, conjunctions and prepositions | US news and PR writing |
| Chicago Manual of Style | Title case, with prepositions lowercased regardless of length, and first and last words always capitalized | Books, long-form publishing |
| APA | Title case for headings within a paper, sentence case for article titles in reference lists | Academic and research writing |
| Canadian Press (CP) | Sentence case headlines, often called “down style” | Canadian journalism |
| Microsoft Writing Style Guide | Sentence case for nearly everything, including titles, headings and UI | Software and documentation |
| Apple Human Interface Guidelines | Title-style capitalization for short controls like buttons and menu items, sentence style for longer labels | Apple platform apps |
| Google Material Design | Sentence case across UI text | Android and web products |
The Canadian angle nobody mentions
If you have ever noticed that Canadian news headlines look softer than American ones, this is why. Canadian Press style favours sentence case headlines while most US outlets follow AP title case. For Canadian brands this is a small but genuine positioning lever: sentence case reads as local and modern, title case reads as North American editorial authority. Neither is wrong, but the choice communicates something before anyone reads a word.
If you publish in French, the rules change
French does not use title case. French titles and headings take sentence case, capitalizing only the first word and proper nouns, so an English page titled “Our Web Design Services” becomes “Nos services de conception web” rather than “Nos Services De Conception Web”. Days of the week, months and language names are also lowercased in French where English capitalizes them.
This matters for any Canadian brand running a bilingual site. If your English pages are in title case and your French pages were translated by someone applying English capitalization habits, the French side reads as machine-translated to a francophone visitor before they finish the first heading. The fix is simple but has to be written down: sentence case is the standard on all French pages, with no exceptions for headings or buttons. Add that line to your style guide alongside the spacing rules for French punctuation, which also differ.
Which one should your brand pick?
- Pick sentence case if you are a software product, a service business with a modern voice, or anything with a lot of interface text.
- Pick title case if you are a publication, a professional services firm trading on authority, or you publish a lot of long-form editorial.
- Never pick start case as a formal standard. It is what you get by accident, not by decision.
- Whichever you pick, allow one documented exception for title tags, because SERP behaviour is worth testing independently.
Case, SEO and accessibility
Capitalization has no direct effect on rankings. Search engines treat queries and content as case-insensitive, so “brand style guide” and “Brand Style Guide” are the same string to a crawler. Case still matters for three indirect reasons: pixel width, click-through rate, and screen reader behaviour.
Does capitalization affect your title tag?
Not for ranking, but yes for display. Search results are truncated by pixel width, not character count, and capital letters are wider than lowercase ones. A title in start case can be cut off in the SERP while the same title in sentence case fits. If your titles are getting truncated, dropping unnecessary capitals buys you a few characters before you start deleting words.
ALL CAPS and screen readers
Depending on the screen reader and the specific word, an all-caps string can be announced letter by letter as though it were an acronym. “SALE” may be read as “S, A, L, E”. This is inconsistent across readers, which is exactly the problem: you cannot predict it. The safe approach is to type text in normal case and apply capitals visually with CSS.
CSS text-transform versus typed case
text-transform: uppercasechanges appearance only. The underlying text stays as typed, so assistive technology and copy-paste both get the original.text-transform: capitalizeproduces start case, not title case. It capitalizes the letter after every space, which is why it breaks on hyphenated names and words following apostrophes.- There is no CSS value that produces correct title case, because correct title case needs grammar, not string rules.
- Typed all caps is permanent. If a stakeholder later wants mixed case, someone edits every string by hand.
How to enforce case consistency across a brand
Consistency is a systems problem, not a willpower problem. Write the rule down, put it where people work, and give them a tool that makes following it faster than ignoring it.
Implementation checklist
- Choose one default case for headings and one for UI elements. Write both into the brand style guide.
- Document the exception list: product names, acronyms, legal entity names, and title tags.
- Encode it in the design system so component text styles carry the rule, not individual designers.
- Audit existing pages. Export every H1, H2 and button label to a sheet and scan the column.
- Convert in bulk using a converter, then read the output. Machines produce start case, so a human still fixes the short words.
- Add case to the content review checklist so it is caught before publish, not after.
Our free text case converter handles the bulk conversion step in one paste, including sentence case, title case, start case, upper, lower and the programmatic cases. It is the fastest way to clean up a spreadsheet of headings before they go into a CMS.
Common mistakes
- Mixing case styles within one page. The most common version is title case H2s with sentence case H3s, which reads as an accident because it is one.
- Capitalizing internal jargon. Your “Onboarding Process” is not a proper noun. Lowercase it.
- All caps navigation on mobile. Wider letters plus a narrow viewport equals wrapped menu items.
- Trusting a converter blindly. Run the output past a human before it ships.
- Leaving the rule out of the style guide. If it is not written down, it will drift within a quarter.
Case rules belong in the same document as your colour values and type scale. If you do not have that document yet, start with what a brand style guide is and why every business needs one, then look at how we scope identity work in our branding packages or ongoing creative work in our design packages. For budget context, our Canadian branding cost guide covers what a full identity system runs in 2026.
Frequently asked questions
What is the difference between title case and start case?
Title case capitalizes principal words and lowercases short articles, conjunctions and prepositions, so you get “The Best Way to Start a Business”. Start case capitalizes every word regardless of function, giving “The Best Way To Start A Business”. Most automated converters produce start case even when they are labelled title case.
Should headings be sentence case or title case?
Sentence case is the better default for H2 and H3 subheadings because it scans faster and handles long, question-style headings without looking cluttered. Title case remains appropriate for H1s and editorial headlines. The only rule that is not negotiable is picking one and applying it consistently.
Does capitalization affect SEO?
Not directly. Search engines treat text as case-insensitive, so capitalization does not change how a page matches a query. It affects SEO indirectly through pixel width in search results, since capital letters are wider and cause earlier truncation, and through click-through rate, which varies by audience and is worth testing.
What case should buttons and calls to action use?
Sentence case. Buttons are instructions rather than titles, so “Request a quote” reads more naturally than “Request A Quote”. Apple is the main exception, using title-style capitalization for short controls on its own platforms, so match the platform convention when you are building a native app.
Is it bad to use ALL CAPS on a website?
All caps is fine for one to three word labels, eyebrow text and small category tags. It becomes a problem in longer strings because it slows reading and can cause some screen readers to announce words letter by letter. Apply it with CSS rather than typing it, so the underlying text stays readable to assistive technology.
Why does CSS text-transform: capitalize give the wrong result?
Because it applies a string rule, not a grammar rule. It capitalizes the character after every space, which produces start case and mishandles hyphenated words and contractions. There is no CSS value that produces true title case, so title case has to be typed or generated before the text reaches the browser.
The bottom line
Sentence case for things people do, title case for things people read as titles, start case never on purpose. Write the decision into your style guide, encode it in your components, and audit it once a quarter. It is a small rule, but case inconsistency is one of the fastest ways a brand starts to look assembled rather than designed.
If your site is carrying three case styles and no documented standard, that is usually a symptom of a missing design system rather than a copywriting problem. Tell us what you are working with through our intake form and we will tell you what it would take to fix it properly.