What is the difference between Title Case and Sentence case?

Title Case capitalises the significant words across a whole line, the way a headline is written. Sentence case capitalises only the first letter of each sentence and leaves the rest of the words alone.

Which words does Title Case leave lowercase?

The short function words — articles, short prepositions and conjunctions — unless one of them happens to be the first or last word on the line, where it is capitalised anyway.

Does it handle Cyrillic text properly?

Yes. The conversion is language-aware rather than a plain byte-level one, so Ukrainian and other Cyrillic text changes case the way a reader expects it to.

Is my text sent anywhere while it is converted?

No. The conversion runs in this tab and the text never leaves your device, which is also why it is instant even on a long document.

Convert text to uppercase or lowercase

Switch a heading to Title Case, shout something in uppercase, or fix a block that arrived in all caps by dropping it to lowercase. Title Case leaves the usual short words lowercase unless they are first or last, and capitalises both halves of a hyphenated compound. Sentence case capitalises only the first letter of each sentence. Casing uses the language-aware conversion rather than the plain one, so Cyrillic is handled correctly.

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UPPERCASElowercaseTitle CaseSentence case

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Result

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How to change the case of text

Paste or type your text into the box.
Choose uppercase, lowercase, Title Case or Sentence case.
Copy the converted text out, or keep editing and convert again.

Questions about changing text case

What is the difference between Title Case and Sentence case?: Title Case capitalises the significant words across a whole line, the way a headline is written. Sentence case capitalises only the first letter of each sentence and leaves the rest of the words alone.
Which words does Title Case leave lowercase?: The short function words — articles, short prepositions and conjunctions — unless one of them happens to be the first or last word on the line, where it is capitalised anyway.
Does it handle Cyrillic text properly?: Yes. The conversion is language-aware rather than a plain byte-level one, so Ukrainian and other Cyrillic text changes case the way a reader expects it to.
Is my text sent anywhere while it is converted?: No. The conversion runs in this tab and the text never leaves your device, which is also why it is instant even on a long document.

This tool runs entirely in your browser, so the controls above need JavaScript to do anything. The description stays readable either way — nothing here was ever going to be processed on a server.