Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case and more.
About the Case Converter
A case converter changes the capitalisation of text in one step. Paste your text and choose a style: UPPERCASE, lowercase, Title Case, Sentence case, or one of the formats programmers use.
The programming styles are naming conventions. camelCase starts lowercase and capitalises each following word. PascalCase capitalises every word including the first. snake_case separates words with underscores and is common in Python and databases. kebab-case uses hyphens and is the usual choice for URLs and CSS class names.
For writing, sentence case capitalises only the first word and proper nouns and is easiest to read in headings and interface text. Title Case capitalises the main words and is traditional for book and article titles, although style guides disagree about small words such as of, and and the. Always review automatic conversions, particularly names, acronyms and brand spellings.
The text "free online image resizer" becomes "Free Online Image Resizer" in Title Case, "freeOnlineImageResizer" in camelCase, "free_online_image_resizer" in snake_case and "free-online-image-resizer" in kebab-case.
Tips for best results
- Fix text typed with Caps Lock on by converting it to sentence case, then proofreading.
- Use kebab-case for page addresses so words stay readable.
How to use the Case Converter
Why use Toolseza for Case Converter?
Use this tool as often as you need with no paywalls, premium tiers, or hidden daily calculation quotas.
All calculations and file manipulations run inside your web browser. Your inputs are never sent to a cloud server.
Results update in real-time as you type or adjust settings, with instant one-click copy and export capabilities.
Works natively on smartphones, tablets, laptops, and desktop computers with zero installation or account creation.
Editorial Standards & Verification: All formulas, algorithms, and conversion factors implemented on Toolseza adhere to openly documented international standards (ISO, NIST, BIPM, W3C). Results are verified against benchmark reference datasets before publication.
Frequently Asked Questions
Is Case Converter free to use?
Yes — Case Converter is completely free, unlimited, and requires no sign-up.
What is title case?
Title case capitalises the first letter of each major word while leaving articles, short prepositions and conjunctions in lowercase — for example: "The Quick Brown Fox Jumps Over the Lazy Dog".
Is there a limit to how much text I can process?
No — you can paste as much text as you like, there's no character limit.
Does it work on mobile and tablet?
Yes — Case Converter works on any modern browser, including mobile and tablet, no app required.