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Case Converter

Change text to UPPERCASE, lowercase, Title Case or Sentence case.

Convert to

When to use it

The case converter changes the capitalisation of text in one click. Use it to fix text typed with Caps Lock on, turn shouting ALL-CAPS emails into normal sentences, format headings and titles consistently, prepare product names or data for a spreadsheet, or create variable names, file names and URL slugs for code and websites.

How to change text case

  1. Paste or type into Your text, or press Example to see how it works.
  2. Under Convert to, choose a style:
    • Sentence case, lowercase, UPPERCASE
    • Title Case (headline style) or Capitalize Each Word
    • aLtErNaTiNg and iNVERSE for fun
    • camelCase, snake_case or kebab-case for code and URLs
  3. Read the Result, then press Copy result or Download .txt.
  4. Press Clear to start again.

A worked example

A colleague sends a list of blog post titles typed in all capitals: “HOW TO PLAN A WEEKEND IN THE LAKE DISTRICT”. Choose Title Case and it becomes “How to Plan a Weekend in the Lake District”, with “to”, “a” and “in” correctly in lowercase. For the page’s web address, switch to kebab-case: “how-to-plan-a-weekend-in-the-lake-district”.

Which style to use

  • Sentence case: body text, buttons, most UK and modern web headings.
  • Title Case: book, film and article titles; many US-style headlines.
  • UPPERCASE: short labels, warnings and acronyms; avoid for long text.
  • lowercase: email addresses, tags and some brand styles.
  • camelCase / snake_case / kebab-case: code, database fields, file names and URLs.

Tips

  • Check proper nouns (names, places, brands) after using Sentence case.
  • Fix acronyms like NASA or UK if a style lowercases them.
  • Pick one style for headings across a document or website and stick to it.
  • Each line is handled separately, so lists of titles convert in one go.

Programming styles at a glance

From “Order total amount”: camelCase gives orderTotalAmount, snake_case gives order_total_amount, and kebab-case gives order-total-amount.

Common mistakes

  • Using UPPERCASE for whole paragraphs, which reads like shouting and is harder to read.
  • Expecting the tool to know names. “london bridge” won’t become “London Bridge” in sentence case.
  • Using spaces in code names; use camelCase, snake_case or kebab-case instead.

Private by design

Your text is converted in your browser and never uploaded.

Count characters with the Character Counter, find and change words with Find and Replace, or make styled text with the Fancy Text Generator.

Frequently asked questions

What's the difference between Title Case and Capitalize Each Word?

Title Case follows headline style, keeping short words like "a", "and", "of" and "the" in lowercase unless they start or end the title. Capitalize Each Word capitalises every word, which some brands and websites prefer.

How does Sentence case decide where sentences start?

It capitalises the first letter of the text, of each new line, and after a full stop, question mark or exclamation mark, lowercases the rest, and turns a lone "i" into "I". Check names and places afterwards, because the tool can't know which words are proper nouns.

What are camelCase, snake_case and kebab-case for?

They're naming styles used in programming and web addresses. camelCase (myVariableName) is common in JavaScript, snake_case (my_variable_name) in Python and databases, and kebab-case (my-page-name) in URLs and CSS classes.

Will it work with accented letters and other languages?

Yes. It uses your browser's language rules, so letters like é, ß and İ change case correctly in most languages.

Is my text saved or uploaded?

It's never uploaded. Everything happens in your browser.

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