Zokilos

Text Case Converter

Convert text between UPPERCASE, camelCase, snake_case & more

What Is a Text Case Converter?

A text case converter switches text between different capitalization styles — from plain sentences to the naming conventions used in code, like camelCase or snake_case — without you retyping anything.

How to Convert Text Case

1

Pick a case style.

2

Type or paste your text.

3

Copy the output.

Is This Case Converter Free?

Yes — there's no paywall, no watermark, and no sign-up required.

The Ten Case Styles Explained

  • UPPERCASE / lowercase — every letter forced one way
  • Title Case — first letter of each word capitalized
  • Sentence case — only the first letter of each sentence capitalized
  • camelCase — first word lowercase, each following word capitalized, no separators
  • PascalCase — every word capitalized, no separators
  • snake_case — lowercase words joined with underscores
  • kebab-case — lowercase words joined with hyphens
  • CONSTANT_CASE — uppercase words joined with underscores
  • aLtErNaTiNg — case flips with every letter

Converting Between Programming Case Styles

This detects existing camelCase or PascalCase word boundaries, not just spaces — so pasting myVariableName and switching to snake_case correctly produces my_variable_name, rather than treating the whole thing as one long word. That makes it useful for converting identifiers between naming conventions, not just formatting plain text.

How Sentence Case Handles Abbreviations

Sentence case capitalizes the letter after a period, question mark, or exclamation point followed by a space. That means an abbreviation like "Mr. Smith" can come out with "Smith" wrongly capitalized as if it started a new sentence — a known limitation of detecting sentence boundaries this way.

Copying and Swapping Output

"Copy Output" grabs the result to your clipboard. "Swap Input/Output" moves the converted text back into the input box, handy for stacking conversions — like Title Case first, then kebab-case on the result.

Is My Text Saved Anywhere?

No — everything happens in your browser. Nothing you type is ever uploaded or sent anywhere.

Text Case Converter for Coding and Writing

Useful any time text needs to match a specific format, whether that's a coding convention or just proper capitalization.

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Variable & file naming

Convert a name idea into camelCase, snake_case, or kebab-case for code or filenames.

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Headlines & titles

Get consistent Title Case for headings without doing it by hand.

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Constants & config keys

Turn a phrase into CONSTANT_CASE for an environment variable or config key.

Limitations of This Text Case Converter

  • Sentence case can misfire on abbreviations and initials
  • No Excel formula or spreadsheet add-in integration
  • No batch processing — one block of text at a time

Benefits of Using This Tool

  • Ten case styles in one tool, including programming conventions
  • Detects camelCase/PascalCase boundaries, not just spaces
  • Nothing ever uploaded — runs entirely in your browser
  • Free, with no sign-up required

Frequently Asked Questions About Text Case Conversion

Is this case converter actually free?

Yes — there's no paywall, no watermark, and no sign-up required.

Can it convert between programming case styles, like camelCase to snake_case?

Yes. It detects existing camelCase or PascalCase word boundaries, not just spaces, so converting myVariableName to snake_case correctly produces my_variable_name rather than treating it as one long word.

Is Sentence case perfect with abbreviations?

Not always. It capitalizes the letter after a period, question mark, or exclamation point followed by a space, so an abbreviation like "Mr. Smith" can end up with the next word wrongly capitalized as if it started a new sentence.

Does this work as an Excel formula or add-in?

No, this is a standalone web page, not an Excel integration. Paste text in and out manually if you're working in a spreadsheet.

Is my text saved anywhere?

No. Everything happens in your browser — nothing you type is ever uploaded or sent anywhere.

What case styles are available?

UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and aLtErNaTiNg case.