Sentence Case Converter
Turn messy, all caps or randomly cased text into clean sentence case, where only the first letter of each sentence is capitalized and everything else is lowercase. This is exactly what you want when you paste something written IN ALL CAPS, fix a shouty comment, or normalize text that came in with inconsistent casing. The converter detects sentence boundaries at periods, question marks and exclamation points, capitalizes the letter that starts each new sentence, and also capitalizes the standalone word I so it reads naturally. It processes your text line by line and paragraph by paragraph so the structure is preserved. Everything runs locally in your browser, so even long or sensitive passages are converted instantly and are never uploaded to a server.
How to use Sentence Case Converter
- Paste text with wrong capitalization.
- Convert to sentence case.
- Review proper nouns and fix any that were lowercased.
- Copy the result.
Frequently asked questions
What does sentence case do?
It capitalizes the first letter of each sentence and lowercases the rest, fixing text that is in all caps or random casing.
How does it know where a sentence starts?
It detects sentence boundaries at periods, question marks and exclamation points, then capitalizes the letter that begins the next sentence.
Will it lowercase proper nouns?
Because it lowercases everything except sentence starts, proper nouns may be lowercased, so review names after converting.
What is Sentence Case Converter?
Turn messy, all caps or randomly cased text into clean sentence case, where only the first letter of each sentence is capitalized and everything else is lowercase. This is exactly what you want when you paste something written IN ALL CAPS, fix a shouty comment, or normalize text that came in with inconsistent casing.
Is Sentence Case Converter free to use?
Yes. Sentence Case Converter is completely free, with no sign-up and no usage limits.
Does Sentence Case Converter work in a web browser?
Yes. Sentence Case Converter runs in any modern web browser. There is nothing to download or install.
Is my data private with Sentence Case Converter?
Yes. Sentence Case Converter runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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