A text case converter instantly changes the capitalization of any text - all caps, all lowercase, title case, or sentence case - without manually retyping anything. Whether you are fixing a caps-lock accident, formatting headings, or normalizing data, our free online case converter handles it in one click.
What is Text Case Conversion?
Text case refers to the capitalization pattern applied to letters in a string. Different contexts require different cases:
- UPPERCASE - all letters are capitalized. Used for acronyms, shouting in text, and some legal or formal documents.
- lowercase - all letters are small. Common in programming identifiers, URLs, and casual messaging.
- Title Case - the first letter of each significant word is capitalized. Used for headlines, book titles, and headings.
- Sentence case - only the first letter of the sentence is capitalized, like a regular English sentence. Used for normal prose and UI labels.
- aLtErNaTiNg CaSe - letters alternate between upper and lower. Used for mocking or stylistic effect in social media.
How to Use the Case Converter
- Paste your text - type or paste any text into the input field. There is no character limit.
- Select the case - click the button for the output style you want: UPPERCASE, lowercase, Title Case, Sentence Case, or Alternating.
- Copy the result - the converted text appears instantly in the output area. Click "Copy" to copy it to your clipboard with one click.
Common Use Cases
- Fixing text accidentally typed with Caps Lock on
- Converting article titles to proper Title Case for publications
- Normalizing imported data where inconsistent casing causes issues
- Formatting database column names or code variable names
- Preparing social media posts in all caps for emphasis
- Converting paragraph text to sentence case for UI strings
Frequently Asked Questions
Does Title Case capitalize every word? Most title case conventions capitalize all major words but leave short prepositions, articles, and conjunctions (like "a," "the," "and," "of") in lowercase - unless they are the first word. The tool follows common English title case rules.
Can it handle accented characters like é or ü?
Yes. The converter uses JavaScript's built-in Unicode-aware case mapping, so accented letters like é → É and ü → Ü are handled correctly.
What is the difference between Sentence case and Title Case? Sentence case capitalizes only the first word of a sentence (and proper nouns), treating the rest as lowercase. Title Case capitalizes the first letter of every significant word throughout.
Is there a length limit for the text I can convert? No. The tool processes text of any length entirely in your browser with no server round trip.
Use the Case Converter free, no sign-up required.