Guides
Sentence Case vs Title Case: Which Should You Use?
CaseSwitch Team · 2026-02-18 · 5 min
Same words, different capitalization. A practical guide to picking sentence case or title case for emails, headings, buttons, and social posts.
Sentence case and title case are the two capitalization styles people mix up most often. Both are valid; they serve different jobs. Picking the wrong one is usually what makes text feel awkward, not the tool you used to convert it.
Quick decision guide
- Writing a paragraph, email, or chat message → sentence case.
- Writing a heading, article title, or slide title → title case (or your org's heading style).
- Writing a button or short label → check your design system; often sentence case or capitalized case, not full title case.
- Fixing text typed with Caps Lock on → sentence case for prose; lowercase for tags, slugs, and identifiers.
The same line in both styles
Source phrase: how to fix accidental caps lock text
- Sentence case: How to fix accidental caps lock text.
- Title case: How to Fix Accidental Caps Lock Text.
Sentence case reads like normal writing. Title case reads like a headline. Neither is wrong — the context decides.
Examples by context
Email to a colleague
Use sentence case in the subject line if your workplace does (Re: quarterly report draft is common). Use sentence case in the body. A title-cased email body looks like every sentence is shouting a headline.
Blog post
Title case (or your CMS heading style) for the post title. Sentence case for the excerpt and every paragraph below. Readers expect the title to look different from the body.
Landing page hero
The main hero line is often title case: Switch Text Case Instantly. Supporting copy underneath is sentence case: Convert, clean, and format text in your browser. Mixing them on purpose creates hierarchy.
Common mistakes
- Title case in Slack or Teams messages — makes casual updates feel like press releases.
- Sentence case for a document H1 when the template expects title case — looks unfinished in print layouts.
- Running title case on names and brands — converters may lowercase iPhone or miss McDonald's; check proper nouns by hand.
Convert without retyping
Use the Sentence Case Converter for emails, notes, and body copy.
Use the Title Case Converter for headings and article titles.
For text typed with Caps Lock on, see how to fix accidental Caps Lock text.
Related tools
Title Case Converter
Format blog post titles, slide decks, README headings, newsletter subject lines that your brand treats as titles, documentation section names, and book or article titles in English. It is faster than retouching twenty headings by hand after a draft in sentence case. Convert the heading list; leave the article body in sentence case.
Sentence Case Converter
Use it on emails typed with Caps Lock, meeting notes from a phone, support tickets, OCR from a PDF, and blog drafts that went through an uppercase filter. It is the right tool when the destination is a paragraph, a message, or a UI sentence — not a headline. Product copy, error messages, and documentation body text almost always belong in sentence case because it is easier to scan than a wall of capitals.
Capitalized Case Converter
Button and menu labels in a design system that specifies Start Case (“Save Changes”), spreadsheet column headers, form legends, short display names, and feature lists copied in lowercase. It is a fast way to make every word look intentional when title case would leave “of” and “the” small and you do not want that.