Text Case Converter

Convert text to UPPERCASE, lowercase, Title Case, or sentence case. Change case or capitalize text instantly.

How to use the Text Case Converter

  1. Paste or type your text into the input box.
  2. Click one of the buttons: UPPERCASE (all caps), lowercase (all small letters), Title Case (first letter of each word), or Sentence case (first letter of each sentence only).
  3. The result appears in the output box. You can copy it from there. Changing the case again replaces the result with the new format.

All conversion runs in your browser; nothing is sent to a server. You can switch between formats as many times as you like.

When to use each case

  • UPPERCASE suits short labels, warnings, acronyms, and table headers. Long passages in capitals are hard to read, so avoid them for body text.
  • lowercase is useful for normalising text before you compare or search it, and for making filenames, tags, and URL slugs consistent.
  • Title Case fits headings, article titles, and product names, where each word starts with a capital letter.
  • Sentence case is the everyday style for paragraphs, captions, and many modern interface labels: only the first letter of each sentence is capitalised.

What to know about how it converts

The converter follows simple, predictable rules, so it helps to know where you may want to tidy the result by hand:

  • Title Case capitalises every word. Short words such as "and", "of", and "the" also get a capital letter, whereas some style guides keep them lower case. Adjust those afterwards if your style guide requires it.
  • Existing capitals are reset first. Title Case and Sentence case convert the text to lower case before applying the new style, so acronyms such as NASA become "Nasa" and names written in capitals lose them. Re-capitalise those by hand.
  • Sentence case looks for full stops. A new sentence is detected after a period, so sentences that end with a question mark or exclamation mark may need their next word capitalised manually.
  • Numbers, punctuation, and line breaks are left alone. Only letters change.

Practical tips

  • Accidentally typed with Caps Lock on? Paste the text, click Sentence case, and fix any names or acronyms afterwards.
  • Working with a list of names or keywords? Convert everything to lowercase first so that "Apple", "APPLE", and "apple" are treated as the same entry.
  • Preparing a heading? Use Title Case, then lower-case the small joining words if your style guide asks for it.

Frequently asked questions

Is my text sent to a server?
No. The conversion happens in your browser and your text stays on your device.
Does it support camelCase or snake_case?
Not at the moment. This tool covers uppercase, lowercase, Title Case, and Sentence case, which are the styles used when writing text for people.
Will it change my line breaks or punctuation?
No. Only the capitalisation of letters changes; everything else is kept as you typed it.