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Case Converter – Title Case, Sentence Case & URL Slug
Convert any text or headline between smart Title Case, Sentence case, UPPERCASE, lowercase, and clean SEO URL slugs in one click.
Instant SEO URL slug:
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Title Case, Sentence case, and URL slugs explained
When to use each capitalization style in articles, headlines, and code.
Smart Title Case vs. Capitalized Case
Most basic word processors capitalize every single word when you select “Title Case.” Proper editorial Title Case (used by APA, MLA, AP, and the Chicago Manual of Style) capitalizes major words — nouns, verbs, adjectives, adverbs, and pronouns — while keeping short minor words lowercase unless they are the first or last word of the headline or follow a colon.
| Word Category | Rule in Smart Title Case | Examples |
|---|---|---|
| First & Last Word | Always capitalized | How to Write a Guide to SEO |
| Major Words | Always capitalized | Nouns, verbs (including Is, Are, Be), adjectives, adverbs, pronouns |
| Articles | Lowercase (unless first/last) | a, an, the |
| Coordinating Conjunctions | Lowercase (unless first/last) | and, but, for, nor, or, so, yet |
| Short Prepositions | Lowercase (unless first/last) | at, by, for, from, in, into, of, off, on, onto, over, to, up, with |
When to use Sentence case for headings
Many modern publications, UX style guides, and technical blogs use Sentence case for H2 and H3 subheadings because it reads more naturally and makes proper nouns stand out clearly. If you copied an ALL-CAPS heading from a PDF or slide deck, click Sentence case to restore natural capitalization across multiple sentences at once.
How to generate an SEO-friendly URL slug
Search engines prefer clean, readable URLs in kebab-case (lowercase words separated by hyphens). Whenever you type a headline above, the tool automatically generates an instant SEO URL slug by stripping punctuation, converting spaces to hyphens, and removing trailing dashes.
| Case Format | Example Output | Common Use Case |
|---|---|---|
| Title Case (Smart) | How to Write Better Headlines for SEO | Blog titles, H1 tags, book & video titles, email subject lines |
| Sentence case | How to write better headlines for seo | Subheadings (H2/H3), UI labels, body paragraphs |
| SEO URL Slug (kebab-case) | how-to-write-better-headlines-for-seo | Web page URLs, blog permalinks, CSS class names |
| camelCase | howToWriteBetterHeadlinesForSeo | JavaScript variables, JSON keys, function names |
| snake_case | how_to_write_better_headlines_for_seo | Python variables, database column names, file names |
Once your title is formatted in Title Case, click Check in Headline Checker above to preview how it renders inside Google’s 600px desktop search results, or analyze your full article in the text analyzer.
Frequently asked questions
What is the difference between Title Case and Capitalized Case?
Title Case follows editorial style rules (like APA and Chicago) by capitalizing major words while keeping short articles, conjunctions, and prepositions (such as a, an, the, in, on, and, of) lowercase unless they start or end the title. Capitalized Case capitalizes the first letter of every single word.
Which words are not capitalized in Title Case?
Articles (a, an, the), coordinating conjunctions (and, but, for, nor, or, so, yet), and short prepositions (at, by, for, from, in, into, of, off, on, onto, out, over, to, up, with) remain lowercase in Title Case unless they appear as the first or last word of the headline.
What makes a good SEO URL slug?
A good SEO URL slug is all lowercase, uses hyphens (-) instead of spaces or underscores, removes punctuation and special characters, and keeps the primary keyword concise (typically 3 to 6 words).
How does Sentence case conversion work?
Sentence case converts your text to lowercase and automatically capitalizes the first letter of every sentence (following a period, question mark, exclamation mark, or new line) as well as the standalone pronoun “I”.
Is my text uploaded to a server when I convert case?
No. All text conversions run 100% locally in your browser using JavaScript, so your drafts remain completely private.