Uppercase Converter

When to use all caps

Capitals are the right choice for short text that has to stand out or match a fixed format: button labels, warning signs, form fields that require block letters, airport and product codes, the headings of a legal clause (“LIMITATION OF LIABILITY”). Postal services in many countries also prefer addresses in capitals because scanners read them more reliably.

For anything longer than a line, all caps works against the reader. Lowercase letters have ascenders and descenders (b, d, g, p) that give each word a recognizable outline; in capitals every word is a rectangle, so reading slows down. In emails and chat, a full sentence in capitals also reads as shouting.

What the converter changes

Every letter that has a capital form is replaced by it, in any alphabet that has case: Latin with accents (é → É, ñ → Ñ), Cyrillic (ж → Ж), Greek, Armenian and others. A few characters become two letters, because the capital form is longer:

• ß becomes SS, the standard German spelling in capitals.
• Ligatures such as fi and fl become FI and FL.
• dž, a single character used in Croatian, becomes DŽ.

The Turkish dotless ı becomes a plain I, and the dotted capital İ stays as it is, so Turkish place names keep the correct letter. Digits, punctuation, symbols such as € and emoji are not touched. Line breaks and spacing stay exactly where they were.

Common mistakes

• Converting text you will later need in normal case. Uppercase removes information: once “Paris” and “paris” are both “PARIS”, no tool can tell which was a name. Keep a copy of the original if you might need it again.
• Typing in capitals instead of converting. Text typed with Caps Lock often ends up mixed (“hELLO”). Paste it here and everything becomes consistent capitals, or use the lowercase converter to start over.
• Using all caps for a whole paragraph of terms or instructions. Bold or a heading draws the eye without making the text harder to read.