toololis
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Case Converter

UPPERCASE, lowercase, Title Case, camelCase & more

Input: 0 chars Output: 0 chars

Free text case converter — 12 styles in one tool

Toololis Case Converter converts text between 12 case styles instantly — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, and aLtErNaTiNg. Built for writers, developers, and marketers who need fast, accurate case transformation.

All 12 case styles at a glance

  • UPPERCASE — All characters capitalized
  • lowercase — All characters lowercased
  • Title Case — First letter of each word capitalized
  • Sentence case — First letter of each sentence capitalized
  • camelCase — firstNameLastName (JavaScript variables)
  • PascalCase — FirstNameLastName (classes, React components)
  • snake_case — first_name_last_name (Python, SQL)
  • kebab-case — first-name-last-name (URLs, CSS classes)
  • CONSTANT_CASE — FIRST_NAME_LAST_NAME (environment variables)
  • dot.case — first.name.last.name (config keys)
  • path/case — first/name/last/name (file paths)
  • aLtErNaTiNg — Every other character flipped (memes, sarcasm)

How to use this tool

  1. 1

    Paste your text

    Enter or paste any text into the input area. You can change or re-type at any time — conversions happen live.

  2. 2

    Choose a case style

    Tap one of the 12 case buttons: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, or aLtErNaTiNg.

  3. 3

    Copy the converted output

    The converted text appears instantly. Click Copy to send it to your clipboard, or switch to a different case style to compare options.

Who uses text case converters?

  • Developers converting between naming conventions when refactoring or porting code
  • Writers fixing ALL-CAPS pastes, creating proper book titles, normalizing headlines
  • Marketers standardizing campaign names, URL slugs, and social captions
  • SEO specialists creating URL-friendly kebab-case slugs from titles
  • Data analysts normalizing column names for database imports

Frequently Asked Questions

What is Title Case exactly?
Title Case capitalizes the first letter of each word. Note: strict AP/Chicago style keeps short articles and prepositions (a, the, of) lowercase — this tool capitalizes every word for simplicity. For headline style, review the output manually.
What is camelCase vs PascalCase?
camelCase starts with a lowercase letter and capitalizes each subsequent word: firstName. PascalCase capitalizes the first letter too: FirstName. JavaScript variables typically use camelCase; class names use PascalCase.
When should I use snake_case vs kebab-case?
Use snake_case for Python variables, database column names, and environment variable file names. Use kebab-case for URLs, HTML attributes, CSS class names, and CLI flags.
Does the converter handle special characters?
Yes. Accented letters (é, ñ, ü), emojis, numbers, and punctuation are preserved. Only letter case and separators are changed. For camelCase / kebab-case conversions, spaces and underscores are treated as word boundaries.
Is my text private?
Completely. The entire conversion runs in your browser using JavaScript string methods. Nothing is sent to any server, nothing is logged.
Can I convert very long text?
Yes — the tool handles text up to several megabytes without lag. Conversion is O(n) complexity, meaning a 10 MB document converts in under a second on modern devices.

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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.