Free Sentence Case Converter

🟢 Runs Locally — verified: your files are processed in this browser. No uploads.

Turn messy capitalization into calm sentence case — only the first letter of each sentence gets a capital.

Word Counter

Runs entirely in your browser — paste text and watch the results update instantly. Nothing is uploaded.

100% Client-Side — Your text stays in your browser. Nothing is uploaded.

How to use this tool

  1. 1

    Paste your text

    Ideal for notes written in caps lock, imported subtitles or inconsistently cased drafts.

  2. 2

    Automatic sentence starts

    The tool lowercases everything, then capitalizes the first letter after each . ! ? ؟ ۔ ending — including new lines.

  3. 3

    Copy or download

    Take the cleaned paragraphs straight into your document.

Key features

InputOutput
hello there. HOW ARE YOU?Hello there. How are you?
FIRST LINE then second lineFirst line / Second line — new lines start sentences
wait... REALLY?!Wait... Really?! — repeated marks handled
أهلاً! مرحباArabic ؟ ! endings respected

Privacy: your text never leaves your browser

Every Toolflect Text Tool is 100% client-side. The moment you type or paste text, it is analyzed by JavaScript running inside this browser tab. Your text is never sent to our servers, never stored in a database, and never shared with any third party or AI service. Visit counting (see the note at the foot of this page) is separate from your text and never receives it.

  • No uploads, no accounts, no sign-up
  • Your text is processed locally in your browser and never stored.
  • Works offline once the page has loaded
  • Close the tab and your text is gone from memory

You can even verify it yourself: open your browser's developer tools, switch to the Network tab, and type into the tool — no request ever carries your text. You will also see the Google Analytics request that counts the visit; it carries a page view and never anything you typed, and no cookie or identifier is stored until you accept analytics.

Frequently asked questions

Will it keep acronyms like NASA?
No — sentence case intentionally lowercases everything except sentence starts. Convert first, then re-uppercase special names if needed.
How are sentence ends detected?
Using the same smart engine as our Sentence Counter: punctuation endings, repeated-mark collapsing and abbreviation awareness.
Does a new paragraph get a capital?
Yes — line breaks act as sentence boundaries for capitalization.
Is anything uploaded?
Never; all processing stays in this tab.

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Your text stays in your browser and is not uploaded. We use Google Analytics to count visits; until you choose it runs without cookies and stores nothing on your device. · Privacy Policy