Uppercase Converter
Paste any text and every letter turns into a capital as you type: "pay by Friday" becomes "PAY BY FRIDAY". Digits, punctuation and emoji stay as they are.
Lowercase Converter
Paste text written in capitals and every letter becomes lowercase as you type: "PLEASE READ THE NDA" becomes "please read the nda". Numbers, punctuation and emoji are left alone.
The preview is shortened. Copy and Download include the whole result.
Your text never leaves your device.
How to use
- Paste the text you want to convert into the box.
- Read the lowercase result below. It updates on every keystroke.
- Copy it with one click or download it as a .txt file.
Examples
- Before
- PLEASE READ THE ATTACHED NDA BEFORE MONDAY
- After
- please read the attached nda before monday
- Before
- Hello From NASA And IKEA
- After
- hello from nasa and ikea
- Before
- SKU-4471 BLUE SKU-4472 RED
- After
- sku-4471 blue sku-4472 red
When lowercase is the right fix
The most common reason to convert to lowercase is text that arrived in capitals by accident or by habit: an email typed with Caps Lock on, a spreadsheet exported from an old system that stores everything in capitals, product names copied from a supplier catalogue. Turning it all into lowercase gives you a clean, neutral starting point.
Lowercase is also the standard for many technical values. Email addresses are case-insensitive in practice, so lists are usually stored in lowercase to avoid duplicates like “Anna@Example.com” and “anna@example.com”. Web addresses, hashtags in some tools, file names on Linux servers and CSS class names all work best in lowercase, because “Logo.png” and “logo.png” can be different files.
What it does and does not change
Every capital letter becomes its small form, in Latin, Cyrillic, Greek, Armenian and other scripts with case. Accents stay on their letter, including accents typed as separate combining marks. Digits, punctuation, symbols and emoji are unchanged, and so is the layout: line breaks, tabs and spaces stay where they were.
The converter does not guess which words should keep their capital. Sentence starts, the pronoun “I”, names, brands and acronyms all become lowercase. That is exactly what you want for data cleanup, and not what you want for prose.
Common mistakes
- Lowercasing prose and sending it as is. “i met john in paris” looks careless. For readable sentences use sentence case, which restores capitals after each period, then check proper nouns.
- Lowercasing passwords, codes or IDs. Many systems treat “Ab3xK” and “ab3xk” as different values. Only convert codes when you know they are case-insensitive.
- Fixing Caps Lock text the slow way. If someone typed “hELLO tHERE” with Caps Lock on, lowercase gives “hello there”, and the case converter’s iNVERSE cASE gives “Hello There” in one step.
- Forgetting about German nouns. German capitalizes every noun, so lowercased German text is wrong rather than casual. Use sentence case only for languages that capitalize sentence starts alone.
Frequently asked questions
How do I change capital letters to lowercase?
Paste the text into the box above and the lowercase version appears right away. Copy it back to where it came from. It works for a single word, a list of thousands of lines or a whole document.
Why did names and acronyms become lowercase too?
Lowercase converts every letter, so it cannot keep "NASA" or "London" capitalized. If you want normal sentences with a capital at the start, use the sentence case converter instead, then fix names by hand.
How do I convert to lowercase in Excel or Google Sheets?
Type =LOWER(A1) in an empty column, fill it down, then copy the column and paste it back as values only. For text in Word, select it and press Shift+F3 until it is lowercase, or use Home → Change Case → lowercase.
What happens to the Turkish letter İ?
On this English page, the Unicode default rule applies: İ becomes a lowercase i followed by a combining dot above, so no information is lost. Under Turkish rules it would become a plain i, and the dotless capital I would become ı instead of i.
Does it work for Cyrillic, Greek and accented letters?
Yes. Any alphabet with capital and small letters is converted: ÉCOLE becomes école, ПРИВЕТ becomes привет. Scripts without case, such as Chinese, Arabic or Hebrew, stay as they are.