Change the case of your text, instantly.
Paste your text, pick a mode: the result appears in real time, no clicks, no ads. Accents preserved, proper typographic rules applied.
“Hi, I'm Apolline! Hand me your text and I'll take care of the case.”
Apolline · your favorite capital letterA quick refresher on English capitalization
Three rules that are easy to forget, applied automatically by this tool.
Accented letters survive the switch
English borrows plenty of words and names that carry diacritics. This tool keeps them intact in every mode: “résumé” becomes “RÉSUMÉ”, not “RESUME”, and “Zoë” stays “Zoë”.
Hyphens and apostrophes
In “Each Word” mode, a capital is placed after hyphens and apostrophes: “mary-jane” becomes “Mary-Jane” and “o'brien” becomes “O'Brien”, just as compound names require.
AP-style headlines
The “Title Case” mode follows the convention used by AP style and most publishers: short words (a, of, the, and…) stay lowercase unless they open the title.
Why use a case converter?
Retyping a text written in all caps, fixing a badly capitalized headline or standardizing the case of a list of names is slow and error-prone. This converter transforms any text in an instant: lowercase to uppercase, back to lowercase, capitalization of each word, sentence case, Title Case, inverted or alternating case.
The tool sweats the details: accents and diacritics are preserved on capitals, hyphens and apostrophes are handled correctly, and the “Title Case” mode follows the editorial convention of keeping short connecting words lowercase. It comes in handy every day for writers, community managers, students, assistants, developers and anyone who works with text.
All processing happens entirely in your browser: nothing is sent to a server, as explained in our privacy policy. The tool is published by the French company MLJ and maintained by Jimenez Julien; the publisher's details can be found in the legal notice.
And once the case is sorted, the toolbox takes over: count words, sort a list, clean up a text, generate a URL slug, compare two versions or extract the URLs from a sitemap, always for free and without leaving your browser.
Frequently asked questions
Everything you need to know before converting your first text.
How do I convert text to uppercase online?
Paste your text into the “Your text” field. The UPPERCASE mode is selected by default, so the result appears immediately in the right-hand panel. Then click “Copy” to grab the converted text.
Are accents and special characters preserved (é, ñ, ü)?
Yes. Names and loanwords keep their diacritics: “résumé” becomes “RÉSUMÉ”, not “RESUME”. Every conversion mode preserves accents, cedillas and ligatures, so international names and borrowed words come out intact.
Is my text sent to a server?
No. The conversion runs entirely in your browser, in JavaScript. No text is ever transmitted, stored or analyzed on a server, which makes the tool safe to use even with confidential content.
What is the difference between sentence case and capitalization?
Sentence case capitalizes only the first letter of each sentence, after a period, question mark or exclamation point. Capitalization (the “Each Word” mode) puts a capital at the start of every word, including after hyphens and apostrophes.
Is the tool free and unlimited?
Yes, the tool is completely free, with no account required, no ads and no limit on text length. It is published by the French company MLJ and works on desktop, tablet and mobile.
Who is Apolline?
Apolline is the site's mascot: a capital letter A wearing a red beret, a nod to the school notebooks in which we all learn to shape our very first capitals. She watches over your conversions, from the first letter to the last.