Convert text to Sentence case
Paste or type your text and convert it to Sentence case with one click. It runs entirely in your browser, so nothing is uploaded — just copy the result when you're done.
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How to convert text to Sentence case
- Paste or type your text into the box above — it stays in your browser and is never sent anywhere.
- Press the Sentence case button to transform the text instantly.
- Copy the result, or keep transforming with the other case buttons.
About Sentence case
Converting text to Sentence case reformats your words without changing their meaning — handy for headings, code, data and tidying up pasted text.
Everything runs locally in your browser, with no upload, no limit and no sign-up, and you can chain conversions on the same text.
Sentence case is the default style of natural prose: capitalise the first letter of each sentence and any proper nouns, and leave everything else lowercase. It's the right choice for body copy, descriptions, error messages, tooltips and button labels — modern UI style guides (Google, Apple, GitHub) all favour it because it reads faster and feels less shouty than Title Case. Reach for it when you've pasted in an ALL-CAPS heading or a Title-Cased paragraph and want it to read like an ordinary sentence again.
Frequently asked questions
How do I convert text to Sentence case?
Paste your text into the box and press the Sentence case button. The text is converted instantly and you can copy it — all in your browser.
Is my text uploaded anywhere?
No. The conversion happens entirely in your browser, so your text never leaves your device and nothing is stored online.
Can I switch to another case?
Yes. The other options (UPPERCASE, lowercase, Title Case, Sentence case and more) are right there, so you can transform the same text again.
Is there a limit on how much text I can convert?
No. You can convert as much text as you like — it runs locally and instantly, with no sign-up.
Will Sentence case lowercase acronyms and names like NASA, iPhone or John?
Sentence case only knows where sentences begin (after . ! ?), so it can't reliably tell a proper noun or acronym from an ordinary word and will tend to lowercase mid-sentence ones — fix names, brands like iPhone, and acronyms like NASA by hand afterwards.