Case Converter

The Case Converter instantly transforms your text between every capitalization style — UPPERCASE, lowercase, Title Case, Sentence case, and developer formats like camelCase and snake_case. Paste your text, click a format, and copy the result. No more retyping or fixing capitalization by hand. Free, instant, and private in your browser.

Every Case, One Click

Whether you're polishing a headline, fixing an email typed in caps lock, or naming a variable in code, switching capitalization manually is tedious and error-prone. This tool does it instantly and perfectly, covering the standard writing cases and the specialized conventions developers need.

How to Use It

1. Paste your text into the box.
2. Choose a case from the buttons.
3. Copy the instantly converted result.

The Writing Cases

• UPPERCASE — every letter capitalized, for acronyms and emphasis.
• lowercase — every letter small, for URLs, emails, and a clean look.
• Title Case — major words capitalized, for headlines and titles.
• Sentence case — first letter of each sentence capitalized, for body text.
• Capitalized Case — the first letter of every word capitalized.

The Developer Cases (and Where They Belong)

Programming languages each have naming conventions, and using the wrong one breaks style or even code. Here's the quick reference:

Title Case Done Right

Proper Title Case isn't just capitalizing every word. The editorial rule capitalizes major words while leaving minor words — short articles, conjunctions, and prepositions such as "a", "an", "the", "and", and "or" — in lowercase, unless one starts the title. So "the art of writing clean code" becomes "The Art of Writing Clean Code," not "The Art Of Writing Clean Code." A good converter applies these rules automatically, which is invaluable for blog headlines and SEO titles.

Everyday Lifesavers

• Fix ALL CAPS — flatten a shouted email to lowercase or Sentence case in one click.
• Clean pasted text — standardize messy capitalization copied from PDFs or websites.
• Format headlines — apply correct Title Case to titles and headings.
• Social media — switch tone from formal Title Case to casual sentence case.
• Coding — convert identifiers to the right convention for your language.

Instant and Private

Conversion runs entirely in your browser, so your text never leaves your device — safe for sensitive or unpublished content, with no signup and no limits. The output updates the moment you click, ready to copy and paste anywhere.

Case Converter FAQs

What case formats can it convert to?

It handles the everyday formats — UPPERCASE, lowercase, Title Case, Sentence case, and Capitalized Case — plus developer conventions like camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE, and stylistic options such as aLtErNaTiNg case. Paste your text, click a format, and the conversion is instant.

What is the difference between Title Case and Sentence case?

Title Case capitalizes the first letter of every major word and is used for headlines, book titles, and blog post headings — for example, 'How to Convert Text Case'. Sentence case capitalizes only the first letter of each sentence (and proper nouns), which is the natural style for body text, UI labels, and most professional writing — for example, 'How to convert text case'.

When should I use camelCase, PascalCase, snake_case, or kebab-case?

These are programming naming conventions. camelCase (caseConverter) names variables and functions in JavaScript and Java; PascalCase (CaseConverter) names classes and React components; snake_case (case_converter) is standard in Python and many databases; and kebab-case (case-converter) is used for URL slugs, CSS properties, and HTML attributes. The right one depends on the language or context you're working in.

How do I fix text that's stuck in ALL CAPS?

Paste it and click lowercase to flatten everything, or Sentence case to restore normal capitalization with the first letter of each sentence capitalized. This is the quickest fix for an email accidentally typed in caps lock or text pasted from a source that arrived all uppercase.

Can it clean up messy text pasted from a PDF or website?

Yes. Text copied from PDFs and web pages often arrives with inconsistent or broken capitalization. Running it through Sentence case or Title Case standardizes it instantly, saving you from retyping or manually fixing each word.

Which words stay lowercase in Title Case?

In standard Title Case, major words are capitalized while minor words — short articles, conjunctions, and prepositions like 'a', 'an', 'the', 'and', 'or' — stay lowercase, unless they begin the title. A good converter applies these editorial rules automatically so your headings look professionally formatted.

Is my text private?

Yes. Conversion happens entirely in your browser, so your text is never sent to a server or stored. You can reformat sensitive or unpublished content with complete privacy, and there's no signup or limit.

Is the case converter free?

Yes, it's completely free with no account required. Convert as much text as you want, as often as you want.