Lowercase Converter

Make any text lowercase — free, instant, runs in your browser.

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What is lowercase?

lowercase converts every capital letter to its small form. Digits, spaces and punctuation stay untouched — only cased letters change.

lowercase examples

Hello World EXAMPLE → hello world example
User@Example.COM → user@example.com
MixedCase Input → mixedcase input

Where is lowercase used?

Lowercasing is the standard cleanup step before comparing or storing text: email addresses and usernames are normalized to lowercase, URLs and slugs avoid capitals, and tags, search keywords and product SKUs are often stored in lowercase so duplicates collapse into a single value.

lowercase and other styles

Lowercase is also the raw material for the coding styles: snake_case and kebab-case are lowercase words with separators, and camelCase starts with a lowercase word. Sentence case is lowercase plus a capital at the start of each sentence — see the sibling converters below.

Common mistakes when converting case

Expecting editorial Title Case. The Title Case button capitalizes every word, including short ones: "the lord of the rings" becomes "The Lord Of The Rings". Style guides like AP and Chicago keep words such as "of", "the" and "and" lowercase, so adjust those by hand afterward.
Losing apostrophes. Word-based styles (Title Case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE) split on anything that is not a letter or digit, so "don't stop" turns into "Don T Stop" or "don_t_stop". Remove or restore apostrophes after converting.
Sentence case and proper nouns. Sentence case lowercases the whole text, then capitalizes only the first letter of each sentence, so "i visited NASA in june. it was fun." becomes "I visited nasa in june. It was fun." Re-capitalize names and acronyms yourself.

Pro tips

Rescue a Caps Lock accident with InVeRsE CaSe. Text typed as "hELLO wORLD" while Caps Lock inverted your Shift key flips back to "Hello World" in one click.
Acronyms split cleanly. "HTMLParser" converts to "htmlParser" with camelCase and "html_parser" with snake_case, because the word splitter detects where an acronym ends and the next word begins.
Only letters alternate. In aLtErNaTiNg CaSe, digits, spaces and punctuation stay in place and do not break the pattern: "abc 123 def" becomes "aBc 123 dEf".

Frequently asked questions

Does lowercase change numbers or punctuation?

No. Only cased letters are converted; digits, spaces, punctuation and symbols pass through unchanged, so 'User@Example.COM' becomes 'user@example.com'.

What is the difference between lowercase and Sentence case?

lowercase removes every capital, while Sentence case keeps the first letter of each sentence capitalized: 'HELLO WORLD. BYE NOW.' becomes 'hello world. bye now.' in lowercase but 'Hello world. Bye now.' in Sentence case.

Does it handle accented and non-Latin letters?

Yes. Conversion is Unicode-aware, so accented capitals like É become é and Greek or Cyrillic capitals are lowercased correctly. Scripts without letter case pass through unchanged.

Other case converters

Or switch between every style in one place on the Case Converter homepage.