Case Converter
Paste your text and instantly convert it to UPPERCASE, lowercase, Title Case, or Sentence case — pick the format you need.
How to Use This Tool
Paste your text
Any length of text — a single word or a full paragraph.
Click your target case
Choose UPPERCASE, lowercase, Title Case, or Sentence case.
Review the result
Check it below the buttons instantly.
Copy the converted text
Grab the result ready to paste elsewhere.
About the Case Converter
Changing text case by hand is tedious for anything longer than a few words — retyping a paragraph that was accidentally left in all-caps, or fixing a heading that needs consistent Title Case formatting, eats up time that a simple conversion tool can save instantly.
This tool covers the four cases used most often in everyday writing: UPPERCASE (all capital letters, often used for emphasis or acronyms), lowercase (all small letters), Title Case (capitalizing the first letter of every word, common in headings), and Sentence case (capitalizing only the first letter of each sentence, standard for regular prose).
It's especially useful for cleaning up text that was pasted from a source with inconsistent or unwanted capitalization — like a heading that came through in all-caps from a PDF, or a form field submitted entirely in lowercase.
Frequently Asked Questions
What's the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word, commonly used for headlines and titles ("This Is A Heading"). Sentence case capitalizes only the first letter of the sentence and any proper nouns, matching normal prose writing ("This is a sentence.").
Does Title Case lowercase small words like "a", "the", and "of"?
This tool's Title Case capitalizes every word for simplicity and consistency. Professional style guides (like APA or Chicago) often lowercase minor words such as articles and short prepositions — if you need that specific style, review and manually adjust those words after conversion.
Will Sentence case correctly capitalize proper nouns in the middle of a sentence?
No — Sentence case only capitalizes the very first letter of each sentence based on punctuation, not proper nouns throughout the text, since reliably detecting proper nouns requires more advanced language understanding than a simple case converter provides.
Can I convert just part of my text, not the whole thing?
This tool converts the entire content of the text box at once. To convert only part of a larger document, paste just that specific section into the tool, convert it, then paste the result back into your original document.
Does converting case affect numbers or punctuation?
No — case conversion only affects letters. Numbers, punctuation marks, and symbols remain completely unchanged through any of the four conversion options.
Is my text uploaded anywhere during conversion?
No — case conversion happens entirely in your browser using JavaScript's built-in text methods. Nothing is uploaded or stored.