Convert text case online for free with instant results. Change to uppercase, lowercase, title case, camelCase or snake_case for clean, ready text.
Case conversion uses JavaScript's String.toUpperCase() and String.toLowerCase() methods, which apply Unicode case mapping rules—not just ASCII A-Z. Title case capitalizes the first letter of each word (split on whitespace), though proper title case in English has exceptions (don't capitalize 'and', 'the', etc.). Sentence case capitalizes only the first letter after periods. camelCase removes spaces and capitalizes word boundaries; snake_case and kebab-case insert underscores or hyphens. Some Unicode characters have no uppercase equivalent (ẛạ), and Turkish i/İ mapping differs from English. The tool processes everything client-side, useful for formatting titles, SQL identifiers, or fixing Caps Lock mistakes.
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This tool uses client-side WebAssembly to ensure your data never touches a server. Secure, fast, and 100% private by design.
Type or paste your text into the box.
Click the button for the format you want (e.g., 'UPPERCASE').
The text will instantly transform.
Click 'Copy' to save the result to your clipboard.
Use 'Clear' to start with new text.
Typed with CAPS LOCK on by mistake
hELLO wORLD tHIS IS A TEST
hello world this is a test (lowercase) or Hello World This Is A Test (Title Case)
Make your headings look professional
how to bake the perfect chocolate cake
How to Bake the Perfect Chocolate Cake
Turn phrases into code-friendly formats
User Profile Settings
userProfileSettings (camelCase) or user_profile_settings (snake_case)
Accidentally wrote an whole email in caps!
Convert phrases to proper code naming conventions.
Make blog titles and headings look polished.
Fix inconsistent text from spreadsheets or databases.
**UPPERCASE**: ALL LETTERS CAPITALIZED Use for: Emphasis, acronyms, shouting (jk, don't shout) **lowercase**: all letters small Use for: URLs, email addresses, casual text **Title Case**: First Letter Of Each Word Capitalized Use for: Headlines, book titles, proper titles **Sentence case**: Only first letter capitalized. Use for: Regular sentences, standard writing **camelCase**: firstWordLowercaseRestCapitalized Use for: JavaScript, Java variable names **snake_case**: words_separated_by_underscores Use for: Python, Ruby variable names **PascalCase**: EachWordCapitalized (like camelCase but first word too) Use for: Class names in most languages
Capitalize: - First and last words (always) - Nouns, pronouns, verbs, adjectives, adverbs - Words 4+ letters Don't capitalize: - Articles: a, an, the - Short prepositions: of, to, in, for - Conjunctions: and, but, or **Exception**: Capitalize if first/last word! Example: 'The Art of War' vs 'War of the Worlds' Note: Different style guides (AP, Chicago, APA) have slightly different rules. Our tool follows common web conventions.
Modern text includes more than A-Z: **Works perfectly**: - Accented letters: café → CAFÉ or Café - German: München → MÜNCHEN - Spanish: niño → NIÑO - French: français → FRANÇAIS **Limitations**: - Non-Latin scripts (中文, العربية) unchanged - Emoji stay the same (they don't have case!) - Symbols and numbers unaffected The tool uses JavaScript's built-in case conversion which follows Unicode standards.
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Learn more about this tool and related topics in our blog.
Clean up messy drafts and automate your writing workflow. 10 essential text utilities that will save you hours of manual formatting.
Privacy isn't a perk, it's a requirement. See why top developers are ditching cloud converters for local-first browser utilities.
