Lowercase converter
Letter case is changed using language-neutral rules.
Convert text to lowercase.
About this tool
The lowercase converter changes letters to lowercase while leaving numbers, punctuation, spacing, and line breaks in place. Use it to normalize usernames, clean imported labels, or prepare text for case-insensitive comparison. Language-neutral rules keep the result predictable for code and data work. Paste a sentence, list, or block of text, then copy the converted version from the result field.