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Case Converter Tool

Instantly convert text between different letter cases: lower case, UPPER CASE, Sentence case, Capitalized Case, and more.

INPUT TEXT

CONVERSION OPTIONS

RESULTS

45 characters, 9 words
The quick brown fox jumps over the lazy dog.

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Quick Actions

How to Convert Text Case

  1. Type or paste your text in the input box
  2. Select your desired case option (Sentence, UPPER, lower, etc.)
  3. Click "Convert Text" to see the result
  4. Copy the result or download as a text file
  5. Use Clear to start fresh or Load Example for a sample

All conversions happen instantly in your browser - no data is sent to any server.

Understanding Case Types

  • Sentence case: First letter of sentence capitalized, rest lowercase
  • lower case: All letters lowercase
  • UPPER CASE: All letters uppercase
  • Capitalized Case: First letter of each word capitalized
  • alternating case: Alternates between upper and lowercase
  • Title Case: Major words capitalized (articles and prepositions lowercase)

Choose the style that fits your needs - from formal documents to creative text.

Frequently Asked Questions

Is this case converter free?
Yes, completely free! No hidden costs, no registration. Convert unlimited text instantly.
Is my text data stored?
No. All conversions happen locally in your browser. We do not store, log, or transmit any text you enter. Your privacy is fully protected.
What is Title Case vs Capitalized Case?
Capitalized Case capitalizes every word (e.g., "The Quick Brown Fox"). Title Case follows style guides - articles (a, an, the), coordinating conjunctions (and, but, or), and prepositions (in, on, at) are lowercase unless they are the first or last word.
Does it handle accented characters?
Yes! The converter works with all Unicode characters, including accented letters (é, ü, ñ), emojis, and special symbols.
What is alternating case used for?
Alternating case (also called "mock case" or "spongebob case") is often used for memes, social media posts, or to convey sarcasm. It alternates between uppercase and lowercase letters.
Can I use this for commercial purposes?
Yes, you own the converted text. Use it for any purpose, personal or commercial. No attribution required.