Sentence Case Converter
Lowercase text and capitalize the first letter of each sentence ending with a period, exclamation mark or question mark.
Description
Lowercase text and capitalize ASCII sentence starts after ., !, or ?.
Sentence case can clean all-caps drafts and simple interface copy, but this converter follows punctuation rules rather than grammatical or named-entity analysis.
When to use Sentence Case Converter
- Convert an all-caps draft
- Normalize simple sentence-delimited copy
- Prepare short text for manual review
How the calculation works
The input is lowercased, then the first ASCII letter at the beginning and after `.`, `!`, or `?` plus optional whitespace is uppercased.
Interpreting the result
Proper nouns, acronyms, brands, abbreviations, and the pronoun ‘I’ may require manual restoration after the mechanical conversion.
Important limitations
- Only ASCII sentence starts are capitalized.
- Periods in abbreviations can create false boundaries.
- Original intentional capitalization is lost.