Sentence Case Converter
Convert text to Sentence case — the output updates automatically as you type.
Processed locally in your browser — nothing is sent to a server.
Keeps known mixed-case terms (like "iPhone") correctly cased regardless of the transform applied.
One per line. Each entry overrides the built-in casing for that term.
Input
1 lines58 charsValid
Sentence case output
1 lines58 charsValid
About this tool
Paste text and the Sentence case version appears on the right automatically — first letter of each sentence capitalized, the rest lowercased, and a standalone "i" corrected to "I".
Frequently asked questions
- What does Sentence case do exactly?
- It capitalizes the first letter of each sentence and lowercases everything else, including a standalone lowercase "i" which becomes "I" — matching normal prose conventions.
- Does it capitalize proper nouns and places?
- Not automatically — Sentence case only capitalizes sentence starts. Turn on "Auto-correct proper nouns and abbreviations" below and add your own terms to keep brand names and known terms correctly cased no matter what.
- How are sentence boundaries detected?
- A period, question mark, or exclamation mark followed by whitespace starts a new sentence, whose first letter is then capitalized.
- Is my text sent to your servers?
- No. The conversion runs entirely in your browser. Nothing you paste here is sent to WebCodeIn's servers, logged, or stored.
Privacy
Every conversion runs in your browser. Nothing you paste here is sent to WebCodeIn’s servers, logged, or stored.
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