Case converter
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How to change the case of a text
Paste the text, then choose a case. Vietnamese letters keep their marks in every mode except “Remove diacritics”, which turns them into plain Latin letters.
- Paste the text
One word or a whole page.
- Choose a case
UPPERCASE, lowercase, Sentence case, Title Case, or Remove diacritics. The result shows at once, and changes as you type.
- Check the result
Sentence case capitalises after . ! ? and a line break; Title Case capitalises every word. Words in capitals, like “RINPOCHE”, become “Rinpoche” in both.
- Copy
Press Copy: it copies the result, and says Copied.
Frequently asked questions
Not answered here? Ask Yangopen
How is Title Case different from Sentence case?
Sentence case capitalises the first letter of each sentence. Title Case capitalises every word, which is how Vietnamese titles are often written.
Does it keep Vietnamese letters correct?
Yes. Uppercase and lowercase use Vietnamese rules, so “đ” becomes “Đ”, and the result is composed Unicode (NFC).
What does Remove diacritics do?
It turns “Tiếng Việt” into “Tieng Viet” and “đ” into “d”. Use it for a file name or a system that does not accept Vietnamese letters.
Is my text uploaded?
No. The conversion runs in your browser; the text is not sent anywhere.
Can I copy the result?
Yes. The copy button copies the result, not the original.