Case Converter

What is a case converter?

A case converter is a small tool that changes the capitalisation of your text without you having to retype it. Instead of holding Shift or deleting and rewriting words, you paste your text once and switch between styles — UPPERCASE, lowercase, Title Case and Sentence case — with a single click.

It sounds simple, but fixing capitalisation by hand is one of those tiny, repetitive tasks that quietly eats your time: a heading that came in all caps, a sentence that lost its capital letter, a list pasted from a spreadsheet in the wrong style. This tool turns all of that into one click, and because it runs locally in your browser, your text stays private and the result is instant.

How to use it

1. Paste or type your text into the box above.
2. Pick the case you want: UPPERCASE, lowercase, Title Case or Sentence case.
3. The text updates in place. Repeat with another button if you change your mind.
4. Hit Copy to put the result on your clipboard, or Clear to start over.

As you type, the tool also shows a live count of characters, words, sentences and lines, so it doubles as a quick Word & Character Counter while you work.

Which case should you use?

Choosing the right case is mostly about context and readability:

• UPPERCASE draws maximum attention — good for short labels, warnings or acronyms, but hard to read in long blocks and often reads as shouting.
• lowercase feels casual and modern. It works for stylistic branding or quick notes, but can look unpolished in formal writing.
• Title Case capitalises the first letter of each word and is the standard for headlines, titles, button labels and navigation. It signals "this is a heading" at a glance.
• Sentence case capitalises only the first word of each sentence (and names). It is the most natural style for body text, UI copy and emails, and modern style guides increasingly prefer it even for headings because it is easier to read.

A reliable rule of thumb: use Title Case for headings, Sentence case for everything you actually read in full, and reserve UPPERCASE for rare emphasis.

Tips and common mistakes

• Title Case is not the same as ALL CAPS. If a heading arrives in UPPERCASE, convert it to Title Case rather than leaving it shouting.
• Watch acronyms. Automatic Title Case will lower the rest of a word, so "NASA" can become "Nasa". After converting, scan for names and acronyms and fix any that matter.
• Sentence case respects punctuation. This tool re-capitalises after each full stop, question mark or exclamation mark, so quotes and lists get sensible capitals too.
• Keep accessibility in mind. Long runs of UPPERCASE are harder to read for everyone and especially for people with dyslexia — prefer sentence case for anything longer than a label.

Because the converter is free, needs no account and processes everything on your own device, it is a safe, fast helper to keep open in a tab whenever you are writing, editing or cleaning up text. Once the capitalisation is right, our Readability Checker tells you whether the writing itself is easy to read.