Free Case Converter
Case Converter instantly transforms the capitalization of any text. Fix accidentally-typed ALL CAPS headings, format titles properly, or convert variable names between camelCase, snake_case and kebab-case when coding.
One click applies the transformation to your whole text, and a copy button puts the result on your clipboard.
How to use the free case converter
- Paste or type your text into the box.
- Click a case style: UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg, camelCase, snake_case or kebab-case.
- Copy the result with one click, or clear to start over.
- Chain styles — apply another case on top of the result for combined effects.
Key features
- 8 case styles: from classic title case to programmer-friendly snake_case and kebab-case.
- One-click copy: grab the converted text instantly.
- Smart title case: capitalizes each word correctly, including after quotes and brackets.
- Free & private: no account, no uploads, unlimited use.
Frequently asked questions
What is the difference between Title Case and Sentence case?
Title Case capitalizes every major word (“The Quick Brown Fox”), while Sentence case capitalizes only the first word of each sentence (“The quick brown fox”).
When would I use snake_case or kebab-case?
In programming: snake_case for Python variables and database fields, kebab-case for URLs, CSS classes and file names, camelCase for JavaScript variables.
Does it handle large text?
Yes — convert entire articles or code files in one click.
Is my text stored anywhere?
No. Conversion happens locally in your browser.
How do I convert text to Title Case online?
Paste your text into the box, choose Title Case, and copy the result. Free, instant, and nothing is uploaded anywhere.
What’s the difference between UPPER CASE and Capitalized Case?
UPPER CASE makes every letter capital (HELLO WORLD), while Capitalized Case capitalizes the first letter of each word (Hello World) — useful for names and titles.
Can I convert a whole article at once?
Yes — paste thousands of words and the conversion happens instantly. There’s no practical length limit for normal use.
Pro Tips
- Fix ALL-CAPS emails: paste shouting text and convert to sentence case in one click.
- Developers: convert variable names between snake_case, camelCase, and kebab-case for different languages.
- Title case for headings: quickly format blog titles and YouTube titles consistently.
More FAQs
What is the difference between sentence case and title case?
Sentence case capitalizes only the first letter of each sentence; title case capitalizes the first letter of most words — the standard for headings.
Does it handle non-English characters?
Basic Latin case conversion is fully supported; some special characters in other scripts may not change case.
How It Works: Under the Hood
Case conversion looks trivial until you hit the edge cases — which is exactly where naive implementations break. Sentence case lowercases everything, then capitalizes the first letter of the text and the first letter after each sentence terminator (. ! ?). Title case capitalizes the first letter of each word, but proper implementations leave articles, prepositions, and conjunctions lowercase (the, of, and) unless they’re the first word — following Chicago/AP style rules.
camelCase and PascalCase strip all separators and capitalize each word boundary (PascalCase also capitalizes the first word); snake_case and kebab-case lowercase everything and join with underscores or hyphens. The hard part is word-boundary detection: splitting “userID” into “user” + “ID”, or handling acronyms like “HTTPSConnection” without mangling them into “H T T P S Connection”. Good converters use heuristics for consecutive capitals rather than blind per-character rules.
Unicode adds another layer: Turkish has dotted and dotless I (İ/i vs I/ı), German ß uppercases to SS, and Greek has context-dependent sigma. A converter that only handles A–Z will silently corrupt international text.
Real-World Use Cases
- Fixing pasted spreadsheet data: an analyst receives a vendor list in ALL CAPS from a legacy system. One click to title case makes 2,000 rows presentable for a client report.
- Renaming variables across languages: a developer ports Python code (snake_case) to JavaScript and needs user_account_id → userAccountId across dozens of identifiers.
- Normalizing form submissions: a support team converts “JOHN SMITH”, “john smith”, and “John Smith” into consistent title case before importing contacts into a CRM.
- Formatting headings for publishing: a blogger drafts titles in lowercase for speed, then converts to proper title case — catching the articles and prepositions a manual pass would miss.
- Generating CSS class names: a designer turns “Primary Call To Action Button” into primary-call-to-action-button (kebab-case) for a stylesheet.
Advanced Tips
- Batch-process with intention: convert the whole block first, then scan for proper nouns — automated title case will lowercase “iPhone” to “Iphone” and “eBay” to “Ebay”. Keep a mental list of brand names to fix after conversion.
- Use snake_case as a pivot format: when converting between camelCase, kebab-case, and PascalCase, go through snake_case mentally — it’s the easiest form to split reliably, since underscores are unambiguous word boundaries.
- Preserve intentional caps with a marker: if your text has acronyms you want to keep (NASA, API), temporarily replace them with placeholders before converting, then restore — or convert in smaller chunks around them.
- Check small words in titles: after title-casing a headline, verify words like “vs”, “vs.”, “a”, “an”, “the”, “to” — style guides differ on whether “vs” stays lowercase, so match your publication’s rule.
Common Mistakes to Avoid
- Blindly title-casing names: “McDonald” → “Mcdonald”, “O’Brien” → “O’brien”, “van Gogh” → “Van Gogh”. Names have their own capitalization rules — always proofread converted personal and brand names.
- Destroying camelCase identifiers: running “lowercase everything” over code will turn getUserID into getuserid, breaking the program. Never case-convert code without checking identifier integrity.
- Assuming one click is final: sentence case on text with abbreviations (“e.g.”, “Dr.”, “9 a.m.”) can misfire, capitalizing the word after every period. Review the output around abbreviations.
- Forgetting locale issues: converting Turkish text with an English-only converter corrupts dotted/dotless I. For non-English content, verify the output character by character.
Fix ALL-CAPS Headlines in One Click
Pasted a headline that’s stuck in ALL CAPS? One click converts it to proper Title Case — no retyping, no hunting for the shift key. It handles the tricky bits too, keeping small words like “and” and “the” lowercase the way style guides want. Perfect for cleaning up email subject lines and blog titles. Check your final word count with the word counter before you publish.
Clean Up Pasted Text Before Publishing
Text copied from PDFs, Word docs, or the web often arrives with weird capitalization and extra spacing. Run it through the case converter to normalize everything, then strip duplicates with remove duplicate lines for a clean draft. What took ten minutes of manual fixing now takes ten seconds. It’s a small habit that makes every article, listing, and post look more professional.