String to Lowercase Converter
Drop every letter of a string down to lowercase in one pass.
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How do you convert a string to lowercase?
Lowercasing is the usual first step before comparing strings: “[email protected]” and “[email protected]” only match once both are all small letters. This converter downcases every capital in a single pass using Unicode mappings, so “CAFÉ” turns into “café” and Greek “Σ” becomes “σ”. Digits and punctuation come through unchanged, and the output refreshes with each keystroke.
How to use the String to Lowercase
- 1 Drop your text into the left panel.
- 2 Every capital letter is downcased the moment it lands.
- 3 Scan the output — digits, symbols and spacing are untouched.
- 4 Copy the lowercase string for wherever it’s headed.
What you can use it for
- Normalising email addresses or usernames to lowercase.
- Cleaning up text that was typed in ALL CAPS.
- Preparing strings for case-insensitive comparison.
- Standardising tags or keywords before storage.
Frequently asked questions
Will it lowercase a long document in one go?
Yes. The whole input converts in a single pass, so a 50,000-character paste behaves the same as one word. There is no length limit beyond what your browser can hold.
Are accented capitals like É handled?
They are. Unicode lowercase mappings cover accented Latin, Greek and Cyrillic, so “CAFÉ” comes back as “café” rather than “cafÉ”.
Can I restore my capitals after lowercasing?
Not the original mix — lowercasing discards which letters were capitals. You can push the result through String to Uppercase for ALL CAPS, or Title Case to recapitalise word starts.
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