Case Converter Guide: Title Case, camelCase, snake_case

A case converter changes the capital letters of your text in one click, so you never have to retype a heading again. The free PHL Tools Case Converter offers eleven styles: UPPERCASE, lowercase, Title Case, Sentence case, Capitalized Words, tOGGLE cASE, Slugify, camelCase, PascalCase, snake_case and CONSTANT_CASE. This complete guide shows what each style does with a real example, when to use it, and how to use the buttons. It runs in your browser, so your text stays private.

What a Case Converter Is For

Capital letters matter more than most people think. A headline in the wrong case looks careless, a variable name in the wrong style breaks code, and text typed with Caps Lock on has to be fixed by hand. A case converter does this in a second.

Typical jobs include fixing a heading, preparing blog titles, cleaning a pasted list, writing code names, and making URL-friendly text. You do not need to learn any rules. You choose a style and the result appears.

Step by Step: Change Text Case

1. Open the Case Converter.
2. Type or paste your text into Your text.
3. Click one of the eleven style buttons at the top. The result appears immediately in Converted text.
4. Press Copy result, or Download .txt to save a file.

Under the style buttons a short note explains the selected style, so you always know what it will do.

All 11 Styles With the Same Example

These results use the input the quick brown fox. it jumps over the lazy dog! is it fast?

tOGGLE cASE flips every letter: Hello World becomes hELLO wORLD. It is mostly for fun, or for fixing text typed with Caps Lock on by mistake.

Writing Styles: When to Use Each

UPPERCASE and lowercase

Use UPPERCASE for warnings, labels and short emphasis. Use lowercase to fix text typed with Caps Lock, or to prepare text for tools that ignore case.

Title Case

Best for headlines and blog titles. Every word starts with a capital except short words such as a, an, the, and, but, or, for, of, in, on, to, with, unless they are the first or last word. There is no single universal rule: AP, Chicago, APA and MLA differ, so check your style guide for formal titles.

Sentence case

Normal writing. The text is lowercased, then the first letter of each sentence gets a capital (after the start, after . ! ? and after a line break). It cannot know names or acronyms, so fix words like Lahore or PHL by hand.

Capitalized Words

Every word starts with a capital, including short words. Good for names and simple lists.

Coding Styles: camelCase, PascalCase, snake_case, CONSTANT_CASE

Programmers use these styles to write names without spaces.

• camelCase: first word lowercase, later words capitalised. Common for variables and functions in JavaScript.
• PascalCase: every word capitalised. Common for class and component names.
• snake_case: lowercase words joined with underscores. Common in Python and databases.
• CONSTANT_CASE: uppercase with underscores. Common for constants.

These four styles treat each line as a separate name, so you can convert a whole list at once. They split words at spaces, punctuation, underscores, hyphens and lower-to-upper changes, so userID becomes user and ID before joining.

Slugify: Web-Friendly Text

Slugify makes lowercase text with hyphens between words, like how-to-learn-english-fast. It keeps accented and non-English letters. If you need to choose the separator, remove small words or limit the length, use the dedicated Slug Generator.

The Buttons

• Copy result: copies the converted text. Shortcut: Ctrl + Enter (Cmd + Enter on Mac).
• Select result: highlights the output so you can copy it yourself.
• Download .txt: saves the result as a text file.
• Use result as input: moves the converted text into the input box, so you can chain two conversions. For example, run Sentence case, then Title Case.
• Paste: pastes from your clipboard.
• Try an example: fills the box with sample text.
• Clear all: empties both boxes.

Other Languages and Special Letters

The converter follows Unicode rules, so accented Latin, Greek and Cyrillic letters change correctly (é becomes É, and ß becomes SS in uppercase). Scripts without capital letters, such as Urdu, Arabic, Hindi and Chinese, stay unchanged. For Urdu text, use the Roman Urdu Converter instead.

Tips for Better Results

• Run Sentence case first on shouting text, then fix names by hand.
• For blog titles, use Title Case and read it once; adjust small words to match your style guide.
• For code, put each name on its own line and convert them all together.
• Use Use result as input to combine steps.

FAQ

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