Case Converter
Instantly change text case — UPPERCASE, lowercase, Title Case, Sentence case, alternating and inverse.
How to Use the Case Converter in 3 Steps
- Paste or type your text into the input box.
- Click the case style you want — UPPERCASE, lowercase, Title Case, Sentence case, or alternating.
- Copy the converted text with one click and use it anywhere.
Frequently Asked Questions
Is it really free?
Yes, 100% free with no limits on text length or the number of conversions. Convert a single sentence or paste an entire document — every case style, from UPPERCASE to alternating case, is available without paying anything at all. Use it as often as you like.
Do I need to sign up?
No signup, no login, and no email required. The converter is ready the instant the page opens, with every case style available immediately. There is simply nothing to register for — just paste your text and convert. It works anonymously, every time.
Is my text private?
Yes. Conversion runs entirely in your browser, so your text never leaves your device or touches a server. Paste confidential emails, personal messages, or work documents with full confidence — nothing is uploaded, saved, or logged anywhere. Your text stays yours, always.
What is Title Case used for?
Title Case capitalizes the first letter of each major word and is the standard style for headlines, article titles, book names, and video titles — for example 'The Quick Brown Fox Jumps'. Our converter applies correct Title Case to any text instantly.
What is Sentence case?
Sentence case capitalizes only the first letter of each sentence, exactly like normal writing. It is the fastest way to fix text that was accidentally typed in ALL CAPS, or to normalize headings pasted from other sources. One click restores proper formatting.
Does it work with non-English text?
Yes, for most Latin-based alphabets. Accented characters such as é, ü, and ñ are handled correctly during conversion. Languages with different capitalization rules, like German nouns or Turkish dotted letters, may need a quick manual review afterwards. The core conversion still works reliably.
Related Tools
(function(){
var inp=document.getElementById('csIn'),out=document.getElementById('csOut');
function titleCase(s){return s.replace(/\w\S*/g,function(w){return w.charAt(0).toUpperCase()+w.slice(1).toLowerCase();});}
function sentCase(s){s=s.toLowerCase();return s.replace(/(^\s*[a-z])|([.!?]\s*[a-z])/g,function(m){return m.toUpperCase();});}
function altCase(s){var r='',u=true;for(var i=0;i