Guides/Title case vs sentence case

Title case vs sentence case

Capitalization changes how professional or casual a headline feels. Two everyday styles cover most writing: title case and sentence case. Code and URLs often need snake_case or kebab-case instead.

What each style looks like

• Title Case: Each Major Word Starts With A Capital — e.g. How to Calculate Percentage Increase
• Sentence case: Only the first word (and proper nouns) capitalized — e.g. How to calculate percentage increase
• UPPER CASE: ALL CAPS — use sparingly (shouting / acronyms)
• lower case: everything lower — drafts, tags, usernames

When to use which

• Title case — book titles, many US magazine headlines, some UI labels.
• Sentence case — body copy, many modern product UIs, UK-style headlines, email subjects in some style guides.
• Follow your house style guide when one exists; consistency beats perfection.

Worked examples

1. Input: hello world example text
   Title → Hello World Example Text
   Sentence → Hello world example text
2. Headline draft: “the ultimate guide to tipping in the us” → Title:The Ultimate Guide To Tipping In The Us(you may still manually lowercase short words like “to” / “in” / “the” per AP/Chicago rules — automated tools usually capitalize every word).
3. Code / URLs: snake_case → hello_world_example_text; kebab-case → hello-world-example-text.

Common mistakes

• Mixing title and sentence case in the same navigation menu.
• Using ALL CAPS for long headlines (harder to read).
• Putting spaces in URLs instead of kebab-case hyphens.

Convert instantly

Paste into the freeCase Converterfor UPPER, lower, Title, Sentence, snake_case, and kebab-case. Pair with theWord Counterwhen length matters too.

Related:Word count & reading time·Snake vs kebab case·Title Case in headlines·Checklist Generator

Converting shouty paste:ALL CAPS to Title Case.