Text Case Converter

How the case converter works

The text case converter transforms your text instantly as you type, switching between ten different formatting styles. Each case serves a different purpose: some are used in code (like camelCase and snake_case), others in everyday writing (like Title Case and Sentence case), and a few for emphasis (like UPPERCASE and aLtErNaTiNg). Everything runs in your browser—your text is never uploaded.

The ten cases explained

• UPPERCASE – All letters become capital. Example: HELLO WORLD EXAMPLE
• lowercase – All letters become lowercase. Example: hello world example
• Title Case – First letter of each word is capitalized. Example: Hello World Example
• Sentence case – Only the first letter and letters after sentence-ending punctuation are capitalized. Example: Hello world example.
• camelCase – Words are joined with no spaces, first word lowercase, rest capitalized. Example: helloWorldExample
• PascalCase – Like camelCase but all words capitalized including the first. Example: HelloWorldExample
• snake_case – Words joined with underscores, all lowercase. Example: hello_world_example
• kebab-case – Words joined with hyphens, all lowercase. Example: hello-world-example
• CONSTANT_CASE – Words joined with underscores, all uppercase. Example: HELLO_WORLD_EXAMPLE
• aLtErNaTiNg – Every other letter alternates between lowercase and uppercase, starting lowercase. Example: hElLo WoRlD eXaMpLe

Title case rules

Title Case follows English-language style conventions where small words stay lowercase unless they appear first or last in the text. This tool treats these words as small: a, an, the, and, but, or, nor, for, so, yet, at, by, in, of, on, to, up, as, if, per, via.

Different style guides have different rules. AP Style and Chicago Manual of Style differ on which words to capitalize, so your style guide of choice may produce slightly different results. This tool uses a common convention suitable for most contexts.

Developer cases

The programmatic cases (camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE) break input into tokens by splitting on spaces, punctuation, and case transitions. This means camelCase input like 'myVariableName' correctly tokenizes into 'my', 'Variable', 'Name' and can be converted to any other format.

These cases are standard in different programming languages and contexts: camelCase and PascalCase in JavaScript and Java; snake_case in Python and SQL; kebab-case in CSS and URLs; CONSTANT_CASE for global constants and environment variables.

For multi-line text, each line is converted independently and line breaks are preserved, making the converter suitable for batch transformations of code comments, variable lists, or similar text blocks.

Frequently asked questions

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