How to convert lowercase to uppercase
Make sure UPPERCASE is selected (it is the default on this page), then paste the text you want to capitalize. Every letter is converted to its capital form instantly, while numbers, spaces and punctuation are left untouched. Click Copy result to grab the all-caps text. Need to go the other way? Pick lowercase from the buttons above.
When all caps is the right choice
- Acronyms and codes: NASA, HTML, SKU numbers and license plates are conventionally uppercase.
- Emphasis in plain-text channels: when bold is unavailable (some chats, terminals, code comments), caps signal importance.
- Legal disclaimers: contracts often require certain clauses in capitals for conspicuousness.
- Design and branding: headlines, logos and buttons frequently use uppercase for impact.
A word of caution: long passages in all caps are harder to read and are widely interpreted as "shouting" in email and social media. Reserve caps for short labels and emphasis.
The conversion modes on this page
| Mode | Example output |
|---|---|
| UPPERCASE | HELLO WORLD |
| lowercase | hello world |
| Sentence case | Hello world. Nice day. |
| Capitalize Each Word | Hello World |
| aLtErNaTiNg | hElLo wOrLd |
FAQ
- Does uppercasing change numbers or symbols?
- No. Only alphabetic letters are affected. Digits, punctuation and spacing stay exactly as you typed them.
- How do I undo all caps back to normal text?
- Switch to lowercase to flatten everything, or Sentence case to restore readable capitalization.
- Is there a character limit?
- No practical limit. Everything runs locally, so large blocks convert instantly and privately.