Text tools
Case Converter
Fifteen conversions in one place — the everyday ones like sentence and title case, the programming ones like camelCase and snake_case, and the useful oddities like URL slugs and inverse case. Paste, click, copy.
All fifteen conversions
| Conversion | “hello world example” | Typical use |
|---|---|---|
| UPPER CASE | HELLO WORLD EXAMPLE | Headings, emphasis, labels |
| lower case | hello world example | Normalising input |
| Sentence case | Hello world example | Body copy, descriptions |
| Capitalise Each Word | Hello World Example | Names, form labels |
| Title Case | Hello World Example | Article and page titles |
| camelCase | helloWorldExample | JS / Java variables |
| PascalCase | HelloWorldExample | Classes, React components |
| snake_case | hello_world_example | Python, SQL columns |
| CONSTANT_CASE | HELLO_WORLD_EXAMPLE | Env vars, constants |
| kebab-case | hello-world-example | CSS classes, filenames |
| dot.case | hello.world.example | Config keys, namespaces |
| url-slug | hello-world-example | Page URLs |
| aLtErNaTiNg | hElLo WoRlD eXaMpLe | Memes, emphasis |
| iNVERSE cASE | HELLO WORLD EXAMPLE | Fixing caps-lock mistakes |
| Reversed | elpmaxe dlrow olleh | Puzzles, testing |
Title case is not one rule
Style guides disagree about which words stay lowercase. The convention used here is close to AP style: articles, coordinating conjunctions and short prepositions stay lowercase unless they are the first or last word. Chicago style capitalises all prepositions of five letters or more, so “Through” would be capitalised there but not here. Pick one and apply it consistently — the inconsistency is far more visible than the choice.
Slugs and why they matter for SEO
A URL slug should be short, readable and stable. Strip stop words where they add nothing, keep the primary keyword, and never change a slug after publishing without redirecting the old one. Accented characters and spaces get percent-encoded into unreadable escapes, which is why the slug converter strips them.
- Good:
/printable-graph-paper/ - Bad:
/page?id=8842&cat=17 - Bad:
/the-ultimate-complete-guide-to-printable-graph-paper-in-2026/
Fixing a caps-lock accident
If you typed a whole paragraph with caps lock on and shift held down, every letter is inverted — lowercase where it should be capital and vice versa. That is exactly what iNVERSE cASE repairs in one click, rather than retyping the paragraph.
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Answers
Frequently asked questions
camelCase for JavaScript and Java variables, PascalCase for classes and React components, snake_case for Python and SQL, CONSTANT_CASE for environment variables and constants, and kebab-case for CSS classes, HTML attributes and file names.cafe-bar-menu-2026, which is safe in a URL and readable in a search result.