Case Converter: Change Text Case Online

How the Case Converter Works

Type or paste text and all eight cases are produced at once — there is no option to choose first. You can convert case on a single word, a sentence or a whole paragraph. Everything happens in your browser; nothing is uploaded or stored.

Digits, punctuation and spacing are never touched. Only letters change, which is why a phone number, a date or a hashtag keeps its shape while the words around it convert.

Changing the Case of Fancy Text

This is the part other case converters get wrong, and it is worth understanding because the failure is silent.

Almost every case converter is built on JavaScript’s toUpperCase(). That function does nothing at all to styled Unicode characters — the mathematical alphabets behind 𝔣𝔞𝔫𝔠𝔶 and 𝓯𝓪𝓷𝓬𝔂 text carry no case mappings, so the text comes back exactly as it went in and the tool appears to have worked:

Here the case is applied to the letter underneath and the result is re-encoded in the same style, so the styling survives the conversion. Note the ℌ in the first row: Fraktur has no capital H of its own, so Unicode falls back to the letterlike form. That is a property of the standard, not a slip.

Paste anything from the font generator into the box above and it will convert properly.

Sentence Case and Capitalized Case

Sentence case capitalises the first letter after every full stop, question mark or exclamation mark and lowercases the rest. It is the one to use on a paragraph that arrived in all caps.

Capitalized Case capitalises every word without exception. Useful for labels and short headings where you want an even look and do not want a rule deciding which words stay small.

Title Case and Its Minor-Word Rule

Title case is the headline convention: capitalise the significant words and leave the minor ones lowercase — of, the, and, a, an, in, to, for, or, but, at, by, on and similar — unless one of them opens or closes the line.

The difference from Capitalized Case shows up immediately on a real title:

Style guides disagree on the edges — whether to capitalise words over four letters, how to treat prepositions — so this uses the common convention rather than claiming to implement AP or Chicago exactly. For a submission that must follow one of those, check the result against that guide.

Alternating Case, the Mocking Text Style

aLtErNaTiNg cAsE is the sarcastic-quote style used in comments and chats, sometimes called mocking text or spongebob text.

One implementation detail that changes the result: this alternates on letters only. Spaces, digits and punctuation do not consume a turn, so the pattern stays visually regular across a whole sentence instead of drifting every time it crosses a space.

Inverse Case

Inverse case flips the case each letter already has rather than imposing a pattern. Hello World becomes hELLO wORLD.

Its practical use is recovering text typed with caps lock on by accident — inverting it usually returns exactly what you meant to type.

Small Capitals

Small capitals are separate Unicode characters shaped like capitals but sized like lowercase. Capitals in your text stay full height and lowercase letters become small capitals, which is what produces the even, quiet look: Qᴜɪᴇᴛ Pʟᴇᴀꜱᴇ.

Two things worth knowing. There is no small capital for x, so it stays as a normal x — the one visible gap in the set. And because these are distinct characters they will not match a search, so keep handles and hashtags in plain letters. For small capitals on their own, with more styles alongside them, use the small caps generator.

Case Conversion Examples

Frequently Asked Questions