Case converter

Free Case Converter Tool

The Case Converter instantly changes any text to uppercase, lowercase, sentence case, title case, camelCase, snake_case, and more. It saves time and eliminates style errors for clean, consistent writing. Use it when formatting headlines, metadata, file names, code identifiers, social captions, or standardizing pasted content.

What is Case Converter?

The Case Converter is a fast, browser-based utility that transforms the letter casing and word style of your text in one click. Paste your content, choose a casing format (like UPPERCASE, lowercase, Title Case, or camelCase), and get clean, consistent output immediately. It’s ideal for writers, developers, marketers, and anyone who needs reliable text formatting.

Available on Monkey Type, the Case Converter focuses on accuracy and convenience. It includes smart title case rules, sentence capitalization, and developer-friendly formats such as PascalCase, snake_case, and kebab-case. You can convert a single line, multiple paragraphs, or entire documents without losing readability.

If you’re preparing content length for SEO or social, pair it with the Word Counter to check limits before publishing. For website slugs after title casing, try the Slug Generator to produce clean URLs.

Why Use Case Converter?

• Eliminate manual edits: Stop retyping text to fix capitalization. The Case Converter applies uniform style instantly, reducing typos and rework.
• Consistent branding and SEO: Keep headlines, H1/H2 tags, and meta titles uniform across pages. Convert to Title Case or Sentence case aligned with your style guide on Monkey Type.
• Developer convenience: Convert labels and keys to camelCase, PascalCase, snake_case, or kebab-case to match project conventions and improve code readability.
• Clean imported content: Standardize messy clipboard text, emails, and PDFs with one click, then refine with the Text Cleaner if needed.
• Faster publishing workflow: Quickly prep social captions, product titles, and support macros without switching between heavyweight apps.

How to Use Case Converter on Monkey Type

1. Open the tool: Go to the Case Converter on Monkey Type.
2. Paste or type text: Insert the content you want to convert. You can include multiple paragraphs, lists, or code identifiers.
3. Select a case option: Choose from UPPERCASE, lowercase, Sentence case, Title Case, tOGGLE cASE, camelCase, PascalCase, snake_case, or kebab-case.
4. Adjust preferences: Optionally enable rules such as “preserve acronyms,” “keep brand names,” or minor-word handling for Title Case.
5. Convert: Click Convert to instantly see the transformed text. The output appears in a separate field for easy comparison.
6. Copy or export: Copy the result to your clipboard. If you need to optimize lengths, use the Character Counter before publishing.

Expected result: Your text is reformatted according to the chosen casing style, with spacing and punctuation preserved. Title Case and Sentence case apply smart capitalization rules, and developer cases rewrite words into the correct delimited format.

Key Features

• Multiple casing modes: UPPERCASE, lowercase, Sentence case, Title Case, tOGGLE cASE, camelCase, PascalCase, snake_case, kebab-case.
• Smart Title Case rules: Automatically handles minor words (a, an, the, for, and, but, etc.) with options to customize exceptions.
• Acronym and brand preservation: Keep terms like NASA, API, or brand names in their preferred capitalization.
• Bulk-friendly conversion: Works with long documents and multi-paragraph inputs without slowing down.
• One-click copy: Copy perfectly formatted output in seconds; verify lengths with the Word Counter.
• Developer-ready cases: Generate camelCase, PascalCase, snake_case, and kebab-case for variables, file names, and CSS classes.
• Text cleanup options: Optional trimming, extra space removal, and punctuation-preserving rules that complement the Remove Line Breaks tool.

Best Practices & Tips

• Match your style guide: Decide between Sentence case or Title Case for headings. For AP-style title case, ensure minor word rules are enabled and customize exceptions.
• Preserve brand integrity: Add brand names to the “don’t change” list so trademarks keep their exact casing.
• Avoid all caps for readability: Use UPPERCASE sparingly; it can reduce legibility and be interpreted as shouting in digital communications.
• Check length before posting: After using the Case Converter, verify character limits for tweets, ads, and meta tags with the Character Counter.
• Use developer cases carefully: When converting to snake_case or kebab-case, confirm word boundaries and remove symbols that shouldn’t appear in identifiers.
• Clean before you convert: If you pasted from PDFs or emails, run text through the Text Cleaner to fix spacing and hidden characters first.

Common Use Cases

• Marketing and SEO: Standardize blog titles to Title Case, and convert meta descriptions to Sentence case for consistent branding. Then create search-friendly URLs with the Slug Generator.
• Content operations: Normalize pasted text from contributors into your house style across newsletters, landing pages, and in-app messages.
• Social media: Convert captions to Sentence case for readability, or UPPERCASE for short callouts—then count length with the Word Counter.
• Development workflows: Transform labels into camelCase or snake_case for variables, file names, and CSS classes without manual editing.
• Data cleaning: Unify inconsistent capitalization in CSVs and forms, preparing data for analysis or import into CRMs.
• Customer support: Format macros and canned responses uniformly in Sentence case for a professional tone.

Frequently Asked Questions

What does the Case Converter do?

The Case Converter transforms text into different capitalization styles such as UPPERCASE, lowercase, Sentence case, Title Case, camelCase, PascalCase, snake_case, and kebab-case. It ensures consistent formatting for writing, code, and data.

Is the Case Converter free on Monkey Type?

Yes. The Case Converter is free to use on Monkey Type and works directly in your browser. You can paste text, convert it instantly, and copy the results without creating an account.

Does it support title case rules and exceptions?

Yes. Title Case supports minor-word rules (like “a,” “an,” “the,” “for,” “and,” “but”) and allows you to preserve acronyms and brand names. You can customize exceptions for precise results.

Can I convert large documents or batches of text?

Absolutely. The Case Converter handles multi-paragraph inputs efficiently. For pre-processing, you can also run content through the Remove Line Breaks or Text Cleaner tools before converting.

How is this different from changing case in a word processor?

Unlike basic change-case functions, the Case Converter offers smart Title Case, Sentence case, acronym preservation, and developer formats (camelCase, snake_case, kebab-case). It streamlines cross-channel publishing and coding workflows in one place.