Case Converter
Everyone has typed a paragraph with caps-lock accidentally left on, or pasted a heading from an old document that came through in all lowercase. Retyping it correctly takes a few minutes; converting it here takes one click. This tool rewrites the capitalization pattern of any text you paste in, without touching the actual words.
What each mode actually does
UPPERCASE turns every letter into a capital — useful for headers, warning labels, or acronyms. lowercase strips all capitals, which is handy when standardizing tags, filenames, or slugs. Title Case capitalizes the first letter of each word, the convention most style guides use for headlines and book titles (note it doesn't apply the more advanced rule of leaving short words like "of" or "the" lowercase mid-title — for that, a manual pass is still worth doing). Sentence case capitalizes only the first letter of each sentence, matching how normal prose is written.
Where this saves real time
A blog editor pasting in a guest author's headline that arrived in all caps from an email. A developer standardizing a list of category names before importing them into a database, where consistent casing avoids duplicate entries like "Shoes" and "shoes" being treated as different categories. A student who wrote an entire essay with caps-lock on by mistake and needs it back to normal sentence case in seconds rather than retyping.
Frequently Asked Questions
What's the real difference between title case and sentence case? Title case capitalizes most individual words (common in headlines, e.g. "The Best Way To Learn"), while sentence case only capitalizes the very first word of each sentence (e.g. "The best way to learn"), matching ordinary paragraph writing.
Will it mess up acronyms already in my text, like "NASA" or "USA"? Since the tool rewrites the whole string based on the mode you choose, acronyms will follow that mode too (e.g. "NASA" becomes "nasa" in lowercase mode) — for text full of acronyms you want preserved, a manual touch-up after conversion is worth it.
Is my text uploaded anywhere? No — the conversion runs entirely inside your browser using JavaScript, so nothing leaves your device.