Text

Text Case Converter

Converts text between the nine cases people actually need, including the four identifier conventions.

Loading the tool…

Processing happens locally in your browser. What you paste or load is processed by this page and is not uploaded to a server. Nothing is stored unless you use a control that says it stores something, and you can clear anything this site has kept from the privacy page.

How to use this tool

  1. Paste the text, or the list of names, you want converted.
  2. Choose a case. The four identifier conventions work one line at a time; the prose cases work on the whole text.
  3. Select Convert.
  4. Check title case against your own style guide — the list of words kept lower case is short, and guides disagree about it.

What case converter does

Case conversion sounds trivial until it is not. Upper and lower case are only simple in ASCII; done properly they follow Unicode rules, so the German ß, the Turkish dotless ı and accented letters behave the way a reader expects rather than being left alone or mangled. This page uses your browser’s Unicode implementation for both.

The identifier conventions — camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE — are the ones that save real time. Each converts one line at a time, and each splits words on spaces, punctuation and camel humps alike, so customerOrderID and "Customer Order ID" both become customer_order_id. That is what makes this usable on a column list pasted straight out of a schema.

Frequently asked questions

Because that is what title case means in most style guides: short prepositions, articles and conjunctions stay lower case unless they begin the title. The list used here is short and deliberately conservative. Style guides genuinely disagree about it, so check the result against yours rather than assuming.

It splits on spaces, punctuation and camel humps together. So "Customer Order ID", customer-order-id and customerOrderID all break into the same three words, which is what lets you paste a mixed list of column names and get one consistent convention out.

Yes. Upper and lower case use your browser’s Unicode rules rather than an ASCII-only conversion, so accented Latin letters, Greek and Cyrillic all convert properly instead of being left untouched.

No. The conversion is JavaScript running in your browser and nothing is sent to a server. Nothing is stored either — closing the tab is all it takes to get rid of it.