convert

Case Converter

Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more.

Runs on your deviceBatch readyPaste textNew

Paste or drop

Paste text below, or drop a file instead.

0 chars · 0 lines
…or drop a file
Drag and drop, or choose files
TXTMDCSVTSVLOGJSONXML+10

Choose an output

Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more.

Fine-tune

Optional — sensible defaults are already set.

About Case Converter

Switch text between twelve letter cases in one step, from everyday UPPERCASE, lowercase, Title Case and Sentence case to the naming styles programmers use: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and dot.case. There are also aLtErNaTiNg and iNVERSE modes for jokes and for fixing text typed with Caps Lock on.

When it helps

  • Fixing a paragraph that was typed with Caps Lock on, using inverse or sentence case.
  • Turning a list of field labels into snake_case column names or camelCase variable names.
  • Making headings and product names consistent before publishing.
  • Converting CSS class names to kebab-case or environment variable names to CONSTANT_CASE.

Tips

  • Title Case here capitalizes the first letter of every word and lowercases the rest. It does not follow AP or Chicago rules that keep 'a', 'of' and 'the' lowercase, so fix those by hand if your style guide needs it.
  • Title and sentence case lowercase the rest of each word, which changes acronyms and brand names like 'NASA' or 'iPhone'. Check those afterwards.
  • The programming cases work line by line, so you can paste a whole list of names and get one converted identifier per line. Punctuation and spaces are dropped.
  • Existing camelCase input is split at the capital letters, so 'userId' converts cleanly to 'user_id' or 'user-id'.

Good to know

Quick answers about case converter in your browser.

Both join words without spaces and capitalize each word. camelCase keeps the first letter lowercase (firstName), while PascalCase capitalizes it too (FirstName). JavaScript variables usually use camelCase; class names in many languages use PascalCase.

Everything is lowercased, then the first letter of the text, of each new line, and of each word after a full stop, question mark or exclamation mark is capitalized. Names and the word 'I' will need fixing by hand.

Yes. There is no sign-up, no watermark and no limit on how many files you process.

No. Files are read and processed locally in your browser, so they never leave your device.

Related tools

DEVURL EncodePercent-encode the contents of a text file for safe URLs.DEVURL DecodeDecode percent-encoded text back to readable text.TXTNewWord CounterCount words, characters, sentences and paragraphs, and estimate reading and speaking time, with a top-words list.TXTNewWord Frequency CounterList every word in your text with how often it appears, ranked and exported as a CSV spreadsheet.TXTNewFind and ReplaceFind and replace words or patterns in text, with optional regular expressions, case matching and whole-word search.TXTNewText Compare (Diff)Compare two texts line by line and get a unified diff showing exactly what was added, removed or changed.TXTNewReverse TextReverse text backwards character by character, flip the order of lines or words, or mirror each line.TXTNewFancy Text GeneratorTurn plain text into bold, italic, script, gothic, bubble, small caps or upside-down Unicode text you can paste anywhere.TXTNewRemove AccentsStrip accents and diacritics from text (é → e, ñ → n, ü → u) and optionally expand ligatures like ß and æ.

Part of the Text Tools collection.