Case Converter
Change text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more.
Paste text, click a style and copy the result. It covers the cases writers need (uppercase, lowercase, sentence case and title case) and the ones programmers use for names (camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE).
It is quick for fixing text typed with caps lock on, tidying headlines and renaming variables.
How case converter works
Sentence case capitalises the first letter of each sentence and lowercases the rest. Title case capitalises the main words and leaves short articles, conjunctions and prepositions lowercase, except at the start and end. Code cases split the text into words and join them with the chosen convention.
Title case rules differ between style guides, so check the result against the guide you follow. Proper nouns and acronyms in sentence case usually need a manual touch.
Worked example: one phrase, many cases
Input: the quick brown fox jumps over the lazy dog
Title Case: The Quick Brown Fox Jumps Over the Lazy Dog
camelCase: theQuickBrownFoxJumpsOverTheLazyDog
snake_case: the_quick_brown_fox_jumps_over_the_lazy_dog
kebab-case: the-quick-brown-fox-jumps-over-the-lazy-dog
When to use this tool
- Rescuing text typed in all capitals.
- Formatting headlines and titles consistently.
- Converting phrases into variable names, file names and URL slugs.
- Normalising imported lists.
Common mistakes to avoid
- Trusting automatic title case for names, brands and acronyms. Check them by hand.
- Using spaces or capitals in URLs. Lowercase kebab-case is the safe choice for slugs.
- Converting code with a different naming convention without checking what the language expects.
Frequently asked questions
- What is the difference between title case and sentence case?
- Title case capitalises most words, as in a headline. Sentence case capitalises only the first word and proper nouns, as in normal writing.
- What is camelCase?
- A style with no separators where each word after the first starts with a capital, such as userAccountName.
- Which case should I use for URLs?
- Lowercase with hyphens (kebab-case) is the usual convention because URLs can be case-sensitive and hyphens read as word separators.
- Is my text uploaded?
- No. The conversion runs in your browser.
Learn more
Related tools
- Word CounterCount words, characters, sentences and paragraphs, with reading and speaking time.
- Character CounterCount characters with and without spaces, and check text against common length limits.
- Reading Time CalculatorEstimate how long a text takes to read or say aloud from its word count.
- Lorem Ipsum GeneratorGenerate placeholder text by paragraphs, sentences or words.
- Text CleanerRemove extra spaces, blank lines, duplicates and stray characters from pasted text.
- Password GeneratorCreate strong random passwords in your browser, with adjustable length and character sets.
Results are for information only and are not financial, legal or medical advice. The calculation logic is covered by automated tests, and examples on this page are worked out and re-checked before publishing. Spotted a mistake? Tell us.