Sentence Case Converter
Sentence case capitalizes only the first word of a sentence (and proper nouns), with everything else lowercase. It is the standard for body copy, email subject lines, and UI text — and this converter cleans up ALL-CAPS or mixed text instantly.
When to use sentence case
Email subject lines, article body text, form labels, and most interface copy. Sentence case reads naturally and feels less shouty than ALL CAPS.
What the converter does
It lowercases everything, then capitalizes the first letter of each sentence, detects sentence boundaries, and preserves proper nouns you mark.
From ALL CAPS to clean copy
Paste a paragraph typed in caps lock and get properly cased sentences back in one click — no retyping.
Frequently asked questions
Does sentence case affect proper nouns?
The converter preserves capitalized proper nouns where it can detect them, and lets you flag names and brands for protection.
Is sentence case better than title case?
It depends on context — sentence case for paragraphs and UI text, title case for headlines and titles. Most style guides recommend sentence case for body copy.
Is this converter free?
Yes — free, unlimited, private, and runs entirely in your browser.
Free · No sign-up · Works in your browser