How does it detect word boundaries?

It splits on spaces, hyphens, and underscores, and also inserts a boundary between a lowercase letter and a following uppercase letter, so camelCase or PascalCase input splits into words correctly too.

What's the difference between camelCase and PascalCase here?

camelCase lowercases the first word and capitalizes the rest (helloWorld); PascalCase capitalizes every word including the first (HelloWorld).

Does it handle acronyms well?

Not specially. An all-caps acronym like "XML" is lowercased along with the rest of its word before re-casing, so results for acronym-heavy identifiers may need manual adjustment.

Case Converter Online - Title, camelCase, snake

Overview

Introduction

Different languages and style guides expect different casing conventions for identifiers, camelCase in JavaScript, snake_case in Python, kebab-case in URLs.

Converting between them by hand is tedious and easy to get wrong.

What Is Case Converter?

A case converter that splits input into words (handling spaces, hyphens, underscores, and camelCase boundaries) and re-joins them in one of seven common casing styles.

It runs entirely client-side as part of this site's String Tools collection, so nothing you paste is ever uploaded to a server.

How Case Converter Works

The tool first normalizes the input into a list of lowercase words, inserting boundaries at existing separators and at lowercase-to-uppercase transitions, then re-joins those words according to the selected style's capitalization and separator rules.

The transformation happens synchronously in JavaScript the moment you type, with no network round trip involved.

When To Use Case Converter

Use it when renaming an identifier between naming conventions, converting a database column name to a JavaScript property name, or formatting a heading.

It's a fast way to get the answer without opening a code editor, a REPL, or writing a one-off script just to check.

Often used alongside Uppercase Text Converter, Lowercase Text Converter and Slug Generator.

Features

Advantages

Covers seven common styles from one tool.
Detects camelCase word boundaries automatically, not just spaces and punctuation.

Limitations

Acronyms and initialisms aren't preserved specially and get re-cased like any other word.
Numbers adjacent to letters aren't treated as separate word boundaries.

Examples

Converting to snake_case

Input

helloWorldExample

Output

hello_world_example

camelCase boundaries are detected and the words are re-joined with underscores.

Converting to Title Case

Input

hello_world_example

Output

Hello World Example

Underscore-separated words are detected and each is capitalized.

Best Practices & Notes

Best Practices

Review acronym-heavy identifiers manually after conversion, since acronyms aren't preserved specially.
Pick PascalCase for class/type names and camelCase for variables/functions, per common JavaScript convention.

Developer Notes

Word splitting first inserts a space between a lowercase-or-digit character and a following uppercase letter (`/([a-z0-9])([A-Z])/g`) before splitting on whitespace, hyphens, and underscores, which is what allows camelCase and PascalCase input to be re-cased correctly, not just space- or punctuation-separated input.

Case Converter Use Cases

Renaming a variable between camelCase and snake_case conventions
Converting a heading to Title Case
Generating a CONSTANT_CASE name for an environment variable

Common Mistakes

Expecting acronyms like "URL" or "XML" to stay uppercase after conversion.
Assuming numbers create word boundaries the way case changes do.

Tips

For URL-safe identifiers, kebab-case is the conventional choice; for environment variables, CONSTANT_CASE.

Case Converter