Sentence Case Converter - Fix Messy Text
Repair pasted copy and format interface text with one capital at the start of each sentence.
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Sentence Case vs. Title Case in UI/UX
Sentence case has become the default for interface writing because it is faster to scan and sounds like a person talking. Apple and Google both recommend sentence case for buttons, menus, labels, and notifications—“Create account”, “Send message”, “Settings”—reserving capitals for proper nouns. Readers process the shape of a sentence-case phrase instantly, while Title Case forces a small pause at every word boundary.
Title case still has its place: it is conventional for publication-style headings, article titles, and formal documents, and some brands keep it on buttons for visual weight. The modern rule of thumb is that sentence case is the neutral, friendly default for software, and title case is the dressier option for editorial headlines. A sentence case converter fixes text to that first convention in seconds—one capital per sentence, everything else small.
Consistency matters more than it sounds. Mixed casing inside one app—a “Sign in” button next to an ALL CAPS screen heading—reads as unfinished design. Running your interface strings through a sentence case converter keeps the voice uniform, and a human pass afterward protects the product names and trademarks no rules can know.
Fixing Copy-Paste Formatting
Copy-paste is where capitalization breaks most often. Text pulled from a PDF can arrive in ALL CAPS, text exported from a database may have lost its sentence boundaries, and headings copied from a website land in the middle of a paragraph still wearing their title case. The result is prose that looks shouted or sloppy before a single word has been edited.
A sentence case converter repairs the common pattern: it lowers the running text and capitalizes the letter that follows a period, question mark, or exclamation point, giving you a clean baseline in one pass. The finishing touches still need your eyes—and sometimes the Title Case converter—because product names, acronyms, and unusual terms are exactly the words an automatic tool is most likely to get wrong.
Writers use this before publishing, editors use it when normalizing submissions, and developers paste log lines or error output through it to make stack traces readable in reports. If the pasted text also carries double spaces, smart quotes, or hidden characters, run it through a text cleaner first and fix the capitalization here second.
Frequently asked questions
Does sentence case capitalize proper nouns like names and cities?
Only by luck. Basic automated sentence casing detects sentence boundaries, not meaning, so it capitalizes the start of each sentence and leaves mid-sentence words alone—“we visited paris in june” would need a manual fix, and a name that begins a sentence is capitalized for the wrong reason. After converting, scan the output for names, cities, product names, and acronyms and restore them by hand.
Your text never leaves your browser
Every tool runs locally on your device. Nothing you paste is uploaded, stored, or tracked.