Case Style Converter

Convert identifiers between camelCase, snake_case, PascalCase, kebab-case and other programming case styles instantly. No signup. Ideal for developers and clean code.

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Result

camelCase
PascalCase
snake_case
kebab-case
CONSTANT_CASE

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This case style converter transforms text between programming case styles, camelCase, snake_case, PascalCase, kebab-case and more, directly in your browser. Paste an identifier or phrase, choose the target style, and copy the result. No account, no install, so developers keeping naming consistent across languages and conventions can convert on any device in seconds.

On this page

How to Convert Case Styles Step by Step
What the Programming Case Styles Are
When Each Case Style Is Used
Who Needs a Case Style Converter
Pro Tips for Consistent Naming
Common Case Style Mistakes to Avoid
Related Tools You May Need Next
Frequently Asked Questions

How to Convert Case Styles Step by Step

Paste your text. Drop the identifier or phrase you want to convert into the input box. It can be in any case style, or plain words, and the converter will reformat it.
Choose the target style. Select the case style you need: camelCase, snake_case, PascalCase, kebab-case, or another, depending on the convention you are following.
Convert. The tool splits the input into its component words and reassembles them in the chosen style, applying the right capitalisation and separators.
Check the result. Confirm the converted identifier looks right in the target style, with the correct word boundaries recognised from your input.
Copy the identifier. Copy the converted text into your code, configuration, or wherever the naming convention requires that specific case style.

Case style converter transforming an identifier between styles

What the Programming Case Styles Are

Programming case styles are conventions for combining multiple words into a single identifier, since most languages do not allow spaces in names. Each style handles the joining differently. camelCase joins words with the first lowercase and each subsequent word capitalised. PascalCase capitalises every word including the first. snake_case joins words with underscores in lowercase. kebab-case joins them with hyphens. These conventions let a multi word name be a single valid identifier.

Different styles dominate in different languages and contexts, which is why conversion is needed. camelCase is common for variables in languages like JavaScript and Java. PascalCase typically names classes and types. snake_case is standard in Python and for database columns. kebab-case appears in URLs, CSS classes and file names. A developer working across languages or systems constantly encounters different conventions and needs to translate names between them.

Word boundaries are the key. Case conversion is more than text replacement: the tool must correctly identify where each word starts and ends, whether separated by capitals, underscores, hyphens or spaces, then reassemble them in the target style. Getting these boundaries right is what makes the conversion accurate.

The key to case conversion is correctly identifying the word boundaries in the input, which is what makes it more than simple text replacement. The converter must recognise where one word ends and the next begins, whether they are separated by capitals, underscores, hyphens or spaces, then reassemble them in the target style. Getting these boundaries right is essential, since it determines how the words are split and rejoined in the new convention.

Consistent naming conventions matter for code quality and collaboration. Following the expected case style for a language or project makes code readable and predictable, helps tools and teammates understand names, and avoids the confusion of mixed conventions. Converting names to the correct style, rather than guessing or doing it manually, keeps a codebase consistent and professional, which is why a reliable converter is a genuinely useful developer tool.

When Each Case Style Is Used

Style	Example form	Typically used for
camelCase	firstSecondThird	Variables in JavaScript, Java
PascalCase	FirstSecondThird	Classes and types
snake_case	first_second_third	Python, database columns
kebab-case	first-second-third	URLs, CSS classes, file names

Who Needs a Case Style Converter

Developers working across languagesSomeone moving code or names between languages with different conventions converts identifiers to the correct style for each, keeping every codebase consistent.

People naming database and code fieldsA developer translating between database column names in snake_case and code variables in camelCase converts between the two conventions accurately.

Front end developersSomeone converting between JavaScript variable names, CSS class names and URL slugs uses the converter to move between camelCase, kebab-case and others.

Developers refactoring codeA person cleaning up inconsistent naming in a codebase converts identifiers to the project's standard style, restoring consistency.

Anyone following a naming conventionA developer who needs a name in a specific case style, but has it in another form or as plain words, converts it to the required convention instantly.

Developer converting names between camelCase and snake_case

Pro Tips for Consistent Naming

Follow your language's convention. Each language and framework has expected case styles, camelCase for JavaScript variables, snake_case for Python, and so on. Convert names to the convention your language expects for readable, idiomatic code.

Use PascalCase for classes, camelCase for variables. A common pattern across many languages is PascalCase for class and type names and camelCase for variables and functions. Keeping this distinction consistent makes code easier to read and understand.

Use kebab-case for URLs and CSS. For URL slugs, CSS class names and file names, kebab-case with hyphens is the standard, since it is readable and valid in those contexts where underscores or capitals are less suitable.

Check word boundaries in tricky inputs. For inputs with numbers, acronyms, or unusual capitalisation, check that the converter split the words as you intended, since these edge cases can be interpreted in more than one way.

Keep naming consistent across a project. Apply the same case conventions throughout a codebase, so names are predictable. Converting inconsistent names to the standard style during refactoring improves the whole project's readability.

Combine with find and replace for bulk changes. When renaming across many places, our Find and Replace Text tool helps apply the converted names throughout your code consistently.

Common Case Style Mistakes to Avoid

Using the wrong style for the language. Applying a case style that does not match the language's convention, like snake_case for JavaScript variables, produces unidiomatic code that looks out of place. Convert to the style your language and framework actually expect.

Misidentifying word boundaries. If the input has ambiguous boundaries, from numbers, acronyms or odd capitalisation, the split may not match your intent. Check the converted result for these tricky cases to ensure the words were separated correctly.

Mixing conventions within a project. Using different case styles inconsistently for the same kind of identifier makes a codebase confusing. Pick the standard style for each identifier type and apply it consistently, converting any that do not conform.

Manually converting error prone names. Converting case styles by hand, especially for long or many identifiers, invites typos and inconsistency. Using a converter ensures the transformation is accurate and consistent every time, which matters when names must exactly match across a codebase.

To apply converted names across your code, our Find and Replace Text tool helps, and the Title Case Converter handles prose capitalisation. For URL slugs specifically, a slug tool formats text into kebab-case.

Identifier shown in multiple programming case styles

Frequently Asked Questions

How do I convert between case styles?

Paste your identifier or phrase into the input box, choose the target style such as camelCase, snake_case, PascalCase or kebab-case, and the tool splits the input into its component words and reassembles them in the chosen style with the correct capitalisation and separators. Copy the result into your code. This keeps naming consistent when moving between languages and conventions, without the errors of converting identifiers by hand.

What are the different programming case styles?

The main ones are camelCase, where words are joined with the first lowercase and each later word capitalised; PascalCase, where every word including the first is capitalised; snake_case, where words are joined by underscores in lowercase; and kebab-case, where words are joined by hyphens. Each is a convention for combining multiple words into a single identifier, since most programming languages do not allow spaces in names, and each dominates in different contexts.

When should I use camelCase versus snake_case?

camelCase is common for variables and functions in languages like JavaScript and Java, while snake_case is standard in Python and for database column names. Which to use depends on the language and context you are working in, since each community has its expected convention. Following the convention your language and framework expect makes your code idiomatic, readable and consistent with what other developers and tools anticipate seeing.

What is kebab-case used for?

kebab-case, which joins words with hyphens in lowercase, is the standard for URL slugs, CSS class names and often file names. Hyphens are readable and valid in these contexts, where underscores or capital letters are less suitable, such as in URLs where kebab-case is conventional and search engine friendly. So when you need a name for a URL, a CSS class, or a file, converting it to kebab-case follows the established convention for those uses.

How does the converter know where the words are?

The converter identifies word boundaries in your input by recognising the separators used, whether that is capital letters as in camelCase and PascalCase, underscores as in snake_case, hyphens as in kebab-case, or spaces in plain text. It splits the input into words at these boundaries, then reassembles them in the target style. Correctly identifying these boundaries is the key part of the conversion, and it handles the common separators automatically.

What is the difference between camelCase and PascalCase?

Both join words together with each word capitalised, but they differ in the first word: camelCase leaves the first word lowercase, so it starts with a small letter, while PascalCase capitalises the first word too, so it starts with a capital. A common convention uses PascalCase for class and type names and camelCase for variables and functions, so the distinction, though small, carries meaning about what kind of identifier a name represents.

Why does consistent naming matter?

Consistent naming conventions make code readable, predictable and easier to work with. Following the expected case style for a language or project helps tools, teammates and your future self understand names quickly, and avoids the confusion of mixed conventions within a codebase. Converting names to the correct, consistent style, rather than mixing styles or converting by hand with errors, keeps a codebase professional and maintainable, which is why reliable case conversion is a useful developer tool.

Is the case style converter free?

Yes, it is completely free with no account and no usage limit. You can convert as many identifiers between case styles as you like, as often as you like, at no cost. It runs entirely in your browser on any device, so your text is processed locally and there is nothing to download or install, and the converted identifier is ready to copy the moment you choose a target style.