Case Converter
Turn any text into UPPERCASE, lowercase, Title Case or sentence case with one click.
What is this tool?
Caps lock accidents, headlines pasted in all caps, article titles that need to follow AP style — text arrives in the wrong case all the time. This case converter fixes it in one click: shouting ALL-CAPS paragraphs become readable sentence case, plain phrases become properly capitalized Title Case for headlines, and anything becomes uniform lowercase for emails or usernames.
Title Case capitalizes the first letter of every word, the style used for headlines, book titles and presentation slides across US media. Sentence case capitalizes only the first letter of each sentence, which is the easiest style to read in body text. The alternating case option creates the playful sPoNgEbOb-style text popular on social media.
How to use it
- Paste or type your text into the box.
- Click the style you want: Uppercase, Lowercase, Title Case, Sentence case or Alternating.
- Click Copy to grab the converted text.
Formula & method
Worked example
'the quick brown fox jumps over the lazy dog' becomes 'The Quick Brown Fox Jumps Over The Lazy Dog' in Title Case, 'THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG' in uppercase, and 'The quick brown fox jumps over the lazy dog' in sentence case.
Frequently asked questions
When should I use Title Case?
For headlines, article titles, book and movie titles, and slide headings. Most US style guides (AP, Chicago) base headline style on Title Case, with short articles and prepositions sometimes left lowercase.
Can it fix text typed with caps lock on?
Yes. Paste the text and click Sentence case or Lowercase. Letters typed as capitals because caps lock was on will be normalized instantly.
Does it work on long documents?
Yes — conversion happens in your browser and handles book-length text without uploading anything.