Case converter

Paste your text in the box and press lowercase. The converted text shows up next to it straight away, and your original stays as it is, so you can try another case without pasting again. Press Copy result or Download .txt to take it with you.

Pick AP, Chicago or APA style. All three capitalize the first word, the first word after a colon or dash, and every major word, and keep articles, short conjunctions and short prepositions lowercase. AP and Chicago also capitalize the last word, and Chicago keeps longer prepositions like between and without lowercase too. The rules are close to each guide, not a full copy of it: a tool can’t tell when up, out, off or down belong to a verb, so they are always capitalized. Check those by hand.

Sentence case capitalizes only the first word of each sentence and of each new line, like normal writing. A sentence ends at a full stop, question mark or exclamation mark, but not after abbreviations such as e.g. or Dr. The word I stays capitalized, and with Keep acronyms on, words like NASA and iPhone stay as typed. Names such as Paris or Maria become lowercase, because a tool can’t know they are names, so fix those by hand.

Press Capitalize Each Word. Every word starts with a capital and the rest is lowercase, also after a hyphen, so self-driving becomes Self-Driving and don’t becomes Don’t. Use Title Case instead if small words like of, and and the should stay lowercase.

Ways programmers join words without spaces. camelCase and PascalCase capitalize each word (userProfileImage, UserProfileImage), snake_case and CONSTANT_CASE join words with underscores, kebab-case with hyphens and dot.case with dots. Words are split on spaces, punctuation and existing capitals, so Hello world-foo_bar and helloWorldFooBar both work as input. Each line is converted on its own.

Yes. Accented letters and other alphabets change case correctly, and German ß becomes SS in capitals. Choose Turkish or Azerbaijani under Language to get İ and ı right, Greek to drop accents from capitals, or Dutch to capitalize IJ as one letter. The title case rules for small words are English only.

Nothing is uploaded. The conversion runs in your browser, and your text is never sent to Trezio or anyone else. Your last input and your settings are kept in this browser’s local storage so a refresh doesn’t lose them; press Clear to remove the text.

This tool changes the case of a text and forgets it. Trezio is where text worth keeping lives: notes, links, screenshots and voice notes in one library, with folders, tags and search, on the web, in the Chrome extension and in the Android app. There’s a free plan.