When to Use camelCase, snake_case, kebab-case, and Title Case

Text case conventions aren't just stylistic preference — different contexts expect different formats, and using the wrong one can cause an actual error, not just look inconsistent.

camelCase

camelCase capitalizes the first letter of every word except the first, with no spaces or separators — myVariableName. It's the standard convention for variable and function names in JavaScript, Java, and many other languages, largely because it's compact and doesn't require typing an extra separator character between words.

PascalCase

A close relative of camelCase, PascalCase capitalizes the first letter of every word including the first — MyClassName. It's the standard convention for class and component names in most object-oriented and component-based languages, which makes it easy to visually distinguish a class or component from a regular variable at a glance.

snake_case

snake_case separates words with underscores and uses all lowercase — my_variable_name. It's the standard convention in Python and Ruby for variable and function names, and it's also common for database column and table names, where underscores read more clearly than camelCase in a query result or a SQL editor.

kebab-case

kebab-case separates words with hyphens — my-page-title. It's the standard for URLs and file names, since spaces in a URL cause encoding issues and most web servers and CDNs handle hyphens more predictably than underscores. It's also the convention for CSS class names and custom HTML element names.

Title Case and sentence case

Outside of code, Title Case capitalizes the first letter of most words, excluding minor words like "and" or "the" — used for headings and titles. Sentence case only capitalizes the first word and proper nouns — used for regular body text and most UI labels, since capitalizing every word in a button label or paragraph reads as shouting rather than emphasis.

Why mixing them up causes real bugs, not just inconsistency

Using the wrong case isn't always just a style violation — a database column named user_id won't be found if code queries for userId instead, and a URL slug with a stray underscore instead of a hyphen might not match what a routing configuration expects. Case conventions are often load-bearing, not decorative, particularly at the boundary between systems that each expect their own default — a JavaScript frontend calling a Python backend's API, for instance, where camelCase and snake_case commonly meet and need explicit translation.

Converting between formats quickly

Renaming a variable, retitling a page, or converting an existing dataset's column names between conventions is tedious to do by hand, especially across many instances in a large file. The Text Case Converter converts text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case all at once, so you can see every option side by side rather than converting one format at a time.

Turning any text into a clean URL slug

For the specific case of turning a page title or business name into a URL, the Slug Generator goes a step further than kebab-case conversion alone — it also strips punctuation and special characters that a plain case converter wouldn't necessarily handle, producing a URL that's guaranteed to be clean and valid.

Try them

Convert between naming conventions with the Text Case Converter, or generate a clean URL slug specifically with the Slug Generator.