Sentence Case Converter

Sentence case capitalizes only the first letter of each sentence and keeps the rest lowercase — the natural, readable style for body copy, product descriptions, emails, and most prose. It is also the fastest way to repair text that was typed in ALL CAPS or in random, inconsistent casing. Paste your paragraph and press Run. Detection is based on sentence-ending punctuation (period, exclamation mark, question mark), so it works for standard English text and recovers a sane capitalization after the worst SHOUTING. The conversion happens entirely in your browser, so the text never leaves the visitor's device — useful when you are fixing customer-submitted content or private drafts. Practical scenarios: you copied OCR output from a scanned PDF and every line is uppercase; a colleague pasted a block in random case; an AI draft came back with odd capitals. Sentence case normalizes all of it in a click. After that, if you need headings, switch to title case; if you need URLs, use slugify. One limitation to be honest about: the tool keys off punctuation, so a missing period at the end of a paragraph may leave the next sentence lowercase. For most everyday text this is a non-issue, and a quick edit fixes it. If your audience writes in languages with different sentence conventions, note that in your expanded copy. For AdSense, treat this as a mini-guide: define sentence case, contrast it with title case, show examples, and include a short FAQ ("What about brand names? They may need manual fixing"). Genuinely useful, original content is the strategy behind every page in this toolbox, and it is what earns approval and rankings.