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Case Converter: Uppercase, Lowercase and Title Case
Switch text between upper, lower, title, sentence and alternating case.
Case Converter tool
About the Case Converter
Case Converter rewrites the capitalisation of text without changing the words. Paste a paragraph that arrived in all capitals, pick the style you want, and the converted version appears below ready to copy. It is faster than retyping and avoids the typos that retyping introduces.
Six styles are available. UPPERCASE and lowercase are self-explanatory. Title Case capitalises the first letter of every significant word and leaves short joining words such as of, and and the in lower case, which is the convention most style guides use for headlines. Sentence case capitalises only the first letter after each sentence ending. Capitalized Case raises the first letter of every word without exception. Alternating case flips between lower and upper on each letter.
The original text stays in the input box, so you can try several styles against the same source and copy whichever reads best. Nothing is uploaded, which makes the tool suitable for unpublished headlines and client copy.
How to use the Case Converter
- Paste your textAdd the text you want to restyle to the input box.
- Choose a casePress one of the six case buttons. The result appears in the output box underneath.
- Compare stylesPress a different button to re-convert from the original text; the input is never overwritten.
- Copy the resultUse Copy result to take the converted text, or Download .txt to save it.
Features
- UPPERCASE and lowercase
- Title Case that respects common short words
- Sentence case across multiple sentences
- Capitalized Case for every word
- aLtErNaTiNg CaSe
- Input is preserved so you can try several styles
- Copy and download the converted text
Who uses this tool
The case converter is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:
- Fixing copy that was typed with Caps Lock on
- Formatting headlines to a house style
- Normalising imported product names before upload
- Preparing consistent headings for a document
- Converting shouty user submissions into readable sentences
Frequently asked questions
Which words stay lowercase in Title Case?
Short articles, conjunctions and prepositions such as a, an, the, and, or, of, in, on, to and for stay lowercase unless they are the first or last word of the title. This follows the convention used by most editorial style guides.
How does Sentence case decide where a sentence starts?
A new sentence begins after a full stop, question mark or exclamation mark followed by a space. The first letter of the text is always capitalised. Proper nouns are not detected, so names may need a manual fix.
Does the converter change my punctuation or spacing?
No. Only letter case changes. Punctuation, line breaks, spacing and the order of words stay exactly as you pasted them.
Does it work with accented letters and non-English text?
Yes. Conversion uses the browser's own Unicode case rules, so accented Latin characters, Greek and Cyrillic all convert correctly. Scripts without letter case, such as Arabic or Chinese, are passed through unchanged.
Can I convert a very long document?
Yes. There is no length limit, and conversion happens instantly because it runs locally in your browser.
Is alternating case useful for anything practical?
It is mostly used for informal or sarcastic emphasis in social posts and memes. It is included because people ask for it, not because it belongs in formal writing.
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