Free Text Case Converter

How this tool computes its result

A single tokenizer (wordsFrom) inserts a space at every lowercase-then-uppercase letter boundary, then splits on any run of non-alphanumeric characters, so input like "user_id-camelCaseValue" tokenizes into several separate words. All eight output cases (lowercase, UPPERCASE, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case) are built from that same word list except Sentence case, which skips tokenization entirely and just lowercases the whole trimmed string before capitalizing its first character.

Worked example

Entering "user_id-camelCaseValue" tokenizes to ["user","id","camel","Case","Value"] -- the lowercase-to-uppercase transition inside "camelCaseValue" gets split at that one boundary -- producing PascalCase output "UserIdCamelCaseValue" and snake_case output "user_id_camel_case_value," with the original camelCase boundary fully decomposed rather than preserved as one word.

When not to use this tool

Because the tokenizer only detects a lowercase-then-uppercase transition, runs of consecutive capitals (acronyms) are not segmented correctly -- "AIVisibilityScore" splits only where a lowercase letter is immediately followed by an uppercase one, not between each letter of "AI," so acronym-heavy identifiers often need manual cleanup after conversion.

Common mistakes

• - Converting an identifier containing an acronym (e.g. "XMLHttpRequest") and expecting the acronym preserved as a unit -- the all-caps "XML" run is not separated from "Http" the way most style guides would, since detection only fires on a lower-to-upper transition.
• - Using Sentence case on multi-sentence input expecting every sentence capitalized -- it only capitalizes the first character of the entire trimmed string; text after later periods is left exactly as typed.
• - Pasting text with digits adjacent to letters (e.g. "Q4Report") and expecting the digit to act as a word boundary -- wordsFrom only splits on non-alphanumeric characters and the lower-to-upper transition, digits do not trigger a split on their own.

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