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Case Converter Tool

Convert your text to camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, lower case and UPPER case simultaneously. Enter multiple lines to convert each line individually. Results update in real time and every format can be copied with one click. All processing happens in your browser.

Last updated: 2026/10/16 Developer Feedback & bug reports
Your text is never sent to a server
Results
camelCase Lower camel case
PascalCase Upper camel case
snake_case Lowercase with underscores
kebab-case Lowercase with hyphens
CONSTANT_CASE Uppercase with underscores
Title Case First letter of each word capitalized
lower case All lowercase
UPPER CASE All uppercase
Sentence case First letter of each sentence capitalized
tOGGLE cASE Inverts the case of each letter

How to Use

1

Enter Text

Type or paste the word or phrase you want to convert. Multiple lines are supported.

2

View Results

As you type, the text is converted into 10 formats such as camelCase, snake_case, Sentence case and tOGGLE cASE. Each line is converted individually.

3

Copy and Use

Press the "Copy" button next to the format you need to copy that result to your clipboard.

About the Case Converter

A web tool that converts text into the naming conventions (cases) commonly used for variables, functions, constants, URL slugs and more — with a single click. Convert between camelCase and snake_case, or join space-separated words into PascalCase in an instant. It also supports Sentence case and tOGGLE cASE, so it is handy for formatting headings and reworking text too. All processing happens in your browser, so the text you enter is never sent to any server.

For how to choose between naming conventions, see our guide to naming cases. Depending on your needs, you may also like the Naming Case Converter for English-word cases, the Full-width / Half-width Converter to normalize character width, and the Text Replace tool for bulk string replacement.

Features

  • Convert to 10 FormatsSee camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, lower and UPPER case, plus Sentence case and tOGGLE cASE at once.
  • Real-time ConversionConverts instantly as you type — no button press required.
  • Batch Line ConversionEnter multiple lines and each line is converted individually. Great for converting lists.
  • Privacy ProtectedAll processing happens in your browser. Your text is never sent to a server.

Use Cases

  • Standardize naming for variables, functions and classes
  • Convert API/JSON keys between camelCase and snake_case
  • Generate constant names (CONSTANT_CASE) and env var names
  • Create URL slugs (kebab-case) and CSS class names
  • Format headings and titles into Title Case

FAQ

Is this tool free to use?
Yes, it is completely free. No registration or installation is required — just open it in your browser and start using it.
Is my text sent to a server?
No. All conversion happens locally in your browser via JavaScript, so your input is never sent anywhere. You can use it with peace of mind.
What is the difference between camelCase and snake_case?
camelCase joins words by capitalizing each word and keeping the first letter lowercase, e.g. "userName". snake_case joins words with underscores in all lowercase, e.g. "user_name". JavaScript commonly uses camelCase, while Python and database columns often use snake_case.
Can I convert multiple words or lines at once?
Yes. Enter multiple lines and each line is converted individually. Within a line, spaces, underscores, hyphens and uppercase boundaries are detected as word separators and reassembled into the chosen format.
Does it work with non-English characters or symbols?
It is optimized for alphanumeric text. Non-English characters and some symbols are preserved, but only the English-word parts are reformatted as naming conventions. For program identifiers, alphanumeric input is recommended.
When should I use CONSTANT_CASE and Title Case?
CONSTANT_CASE (e.g. MAX_COUNT) is used for constants and environment variables, while Title Case (e.g. Max Count) is used for human-readable text such as headings and button labels.
What is Sentence case?
Sentence case lowercases the entire text and then capitalizes only the first letter of each sentence (e.g. "Hello world. This is a test."). Periods, exclamation marks and question marks are treated as sentence boundaries, which makes it handy for formatting English body text and descriptions.
When would I use tOGGLE cASE?
Toggle case inverts the case of every letter (e.g. "Hello" becomes "hELLO"). It is useful for fixing text that was typed with Caps Lock left on by mistake, or for creating decorative text effects.

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