Case converter
Paste some text and switch it to UPPERCASE, lowercase or Sentence case without typing it again. Accented letters such as é or ü are kept intact.
- Free
- No sign-up
- In your browser
Convert to
How to use this tool
- Type or paste the text into the first box.
- Press the conversion you need: UPPERCASE, lowercase, Sentence case, Title Case, aLtErNaTiNg or iNVERSE.
- The result appears in the second box and updates if you keep editing the original text.
- Copy it with “Copy” or download it as a .txt file.
What each option does
Conversions follow Unicode case rules for your language, so accented letters keep their accents: “café” becomes “CAFÉ”.
- UPPERCASE: the whole text in capitals. Handy for signs, labels or acronyms.
- lowercase: everything in small letters. Useful for fixing text typed with Caps Lock on.
- Sentence case: lowercase except the first letter of each sentence and each line, so “HELLO. HOW ARE YOU?” becomes “Hello. How are you?”.
- Title Case: the first letter of every word in capitals and the rest in lowercase.
- aLtErNaTiNg: alternates lowercase and uppercase letter by letter, skipping spaces and punctuation. It's a decorative effect.
- iNVERSE: swaps every capital for a small letter and vice versa. Useful if you typed a text with Caps Lock on by mistake.
Title case and style guides
English titles are often written in title case, but style guides don't capitalize every word. The Chicago Manual of Style and AP style, for example, keep short articles, conjunctions and prepositions in lowercase unless they come first: “The Lord of the Rings”, not “The Lord Of The Rings”. The exact list of lowercase words differs between guides.
This tool's Title Case capitalizes every word, which is fine for labels, file names or buttons. For a headline that has to follow a style guide, convert it and then lowercase the short words by hand. Many publications simply use sentence case for headlines instead.
Names and acronyms to check
When converting to lowercase or sentence case, proper nouns and acronyms are converted too (“London” becomes “london” if it isn't at the start of a sentence, and “NASA” becomes “nasa”). The tool can't tell them apart from other words, so it's worth reviewing them afterwards.
Examples
Text typed with Caps Lock on
“hELLO, HOW ARE YOU?” with iNVERSE becomes “Hello, how are you?”, and with Sentence case you get the same.
A headline in all caps
“TEN TIPS FOR BETTER SLEEP” with Sentence case becomes “Ten tips for better sleep”; with Title Case, “Ten Tips For Better Sleep” (then lowercase “for” if your style guide requires it).
A sign or heading
“important notice” with UPPERCASE becomes “IMPORTANT NOTICE”.
Frequently asked questions
Does Title Case follow AP or Chicago style?
No. It capitalizes the first letter of every word. Style guides keep some short words in lowercase, and their lists differ, so adjust those words by hand if you need to follow a specific guide.
Why did Sentence case lowercase a name?
Because the conversion first lowercases everything and then capitalizes the start of each sentence. It can't know which words are proper nouns or acronyms, so you need to fix them by hand.
Are accents and special letters preserved?
Yes. Conversions use your browser's Unicode case rules, so é, ü, ñ or ç keep their accents and become É, Ü, Ñ or Ç in uppercase.
Is my text sent to a server?
No. The conversion happens in your browser and the text isn't sent to any server or stored.
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