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Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, and programmer cases (camelCase, snake_case, kebab-case, PascalCase). Preserves punctuation and Unicode characters.

Why Use Case Converter?

You've pasted a block of text from a PDF or email and every line is in ALL CAPS. Or a client sent a product list in lowercase and it needs to render as proper title case in your CMS. Manually retyping dozens of lines is slow and error-prone — a good case converter does it in one click and keeps your punctuation, emojis, and non-Latin characters untouched. It also handles the programmer-specific cases (camelCase, snake_case, kebab-case) that text editors usually don't.

How to Use Case Converter

  1. Paste or type your text into the input field.
  2. Click the desired case conversion button: UPPERCASE, lowercase, Title Case, Sentence case, or more.
  3. Copy the converted result to your clipboard with one click.

Worked Examples

Fix an ALL-CAPS paragraph

Input
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG. IT WAS A BRIGHT, COLD DAY IN APRIL.
Output
Sentence case: "The quick brown fox jumps over the lazy dog. It was a bright, cold day in April."

Picks up the period/space boundary to know where each new sentence starts.

Convert a headline to Title Case

Input
the 10 best ai coding tools of 2026
Output
Title Case: "The 10 Best AI Coding Tools of 2026"

Short words like "of" stay lowercase when not the first word, matching AP/Chicago style.

Build a programmer-style identifier

Input
User Account Email
Output
camelCase: userAccountEmail  •  snake_case: user_account_email  •  kebab-case: user-account-email

Useful for renaming fields during a refactor.

About Case Converter

A case converter is an online tool that transforms text between different letter cases such as uppercase, lowercase, title case, and sentence case. The Case Converter is an essential formatting tool that lets you instantly transform text between different cases. Convert to UPPERCASE for headings and emphasis, lowercase for standardizing text, Title Case for proper headings and titles, or Sentence case for natural-looking paragraphs. This tool is invaluable for writers editing copy that was accidentally typed in the wrong case, developers formatting variable names, and content creators standardizing text across platforms. Don't waste time manually retyping text — convert it instantly. All processing happens in your browser for maximum speed and privacy.

Troubleshooting & Common Issues

Title Case is capitalizing short words like "and" and "of"

The tool follows standard English Title Case rules — the first and last words are always capitalized, but short function words (and, or, the, of, in, to, a, an) are lowercased in the middle. If you specifically need every word capitalized (for a design-driven headline), use UPPERCASE on the short words manually or run the text through UPPERCASE instead.

Acronyms like "AI", "URL", and "HTML" get lowercased

Pure Title Case doesn't know which all-caps tokens are acronyms. After conversion, search-and-replace common acronyms back to their proper capitalization. This is usually faster than hand-retyping the whole sentence.

Non-English characters (é, ü, ñ) look correct but the case didn't change

Uppercase/lowercase transformations use the browser's built-in Unicode case mapping, which handles accented Latin characters correctly (é → É, ß → SS). Some Turkish and Azerbaijani characters have locale-specific casing rules — if you're working with those languages, paste the result into a locale-aware editor to double-check.

Line breaks got stripped out after converting

The converter preserves newlines. If lines look collapsed, the source text likely used soft-wraps (no actual line breaks) that your previous editor displayed as separate lines. Paste into a text editor that shows invisible characters to confirm.

Frequently Asked Questions

What is Title Case?

Title Case capitalizes the first letter of each significant word while keeping short function words lowercase (except at the start). For example, 'the quick brown fox' becomes 'The Quick Brown Fox'. It's the standard format for book titles, article headlines, and headings in AP and Chicago style.

What's the difference between Sentence case and Title Case?

Sentence case only capitalizes the first letter of the first word (like a normal sentence), while Title Case capitalizes the first letter of every significant word. Sentence case is used for body text, while Title Case is used for titles and headings.

Can I convert text with special characters?

Yes! The Case Converter preserves all special characters, numbers, and punctuation while only changing the letter casing. Emojis, symbols, and non-Latin characters remain untouched.

How do I convert text to camelCase or snake_case?

The tool includes programmer-specific case outputs: camelCase (userAccountEmail), PascalCase (UserAccountEmail), snake_case (user_account_email), SCREAMING_SNAKE_CASE (USER_ACCOUNT_EMAIL), and kebab-case (user-account-email). These are useful for renaming fields, variables, CSS classes, and URL slugs.

Does the tool handle acronyms like URL or HTML correctly?

Standard Title Case rules lowercase everything that isn't the first letter of a word, so acronyms get downcased. After conversion, search-and-replace your acronyms back to their proper form, or pre-quote them to preserve casing depending on your workflow.

Is there a shortcut for converting to sentence case after OCR?

Yes — paste the text from your OCR output and choose Sentence case. The tool detects sentence boundaries on periods, exclamation marks, and question marks, then capitalizes the first letter of each new sentence while lowercasing the rest. This is the fastest way to clean up OCR'd ALL-CAPS scans.

Is my text stored or sent anywhere?

No. Case conversion runs 100% client-side in your browser using JavaScript's built-in Unicode case mapping. Your text never leaves your device, so it's safe for internal documents, customer data, or anything confidential.

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