UPPER CASE:

This format turns every letter in your sentence into capital letters.
Example: “this is text” ➝ “THIS IS TEXT”

This style is bold, attention-grabbing, and perfect for titles, warnings, or headers where visibility matters. You’ll often see this in posters, email subject lines, or buttons like “SUBMIT” or “DOWNLOAD NOW”.

lower case:

Everything is converted to small letters, no matter how the original text was written.
Example: “This Is Text” ➝ “this is text”

It gives a simple, clean feel—often used for minimalist design or where shouting (all caps) isn’t appropriate. Great for subtitles, footers, or body text in informal writing.

Title Case:

In title case, the first letter of every word is capitalized, and the rest stay lowercase.
Example: “this is text” ➝ “This Is Text”

You’ll typically find this used for book titles, blog post headlines, and article headings. It adds a polished, professional touch to your content.

camelCase:

This style keeps the first word lowercase but capitalizes the first letter of every following word—without any spaces.
Example: “this is text” ➝ “thisIsText”

This is heavily used in programming, especially in JavaScript or Java, to name variables and functions like getUserInfo or isLoggedIn.

snake_case:

This one connects words using underscores and keeps all letters lowercase.
Example: “this is text” ➝ “this_is_text”

In Python, this format is common in programming languages like Python. It makes code easier to read and helps avoid errors when using names that contain spaces.

kebab-case:

Similar to snake_case, but instead of underscores, it uses hyphens (-) to separate words.
Example: “this is text” ➝ “this-is-text”

You’ll often spot this in URLs and file names. That makes it clean, SEO-friendly, and web-safe. For example: techstackfree.com/case-converter.