Question 1

What is the difference between ASCII and Unicode?

Accepted Answer

ASCII is a 7-bit character set with 128 characters (0-127) covering English letters, digits, punctuation and control codes. Unicode is a superset that assigns a unique code point to every character in every language — over 150,000 characters covering Latin, Cyrillic, Greek, CJK, Arabic, emoji and more. ASCII is fully compatible with the first 128 Unicode code points.

Question 2

What are the printable ASCII character ranges?

Accepted Answer

Printable ASCII characters are codes 32-126. Code 32 is space, 48-57 are digits 0-9, 65-90 are uppercase A-Z, 97-122 are lowercase a-z. Codes 0-31 and 127 are control characters (NUL, TAB, LF, CR, ESC etc.) which are non-printable. The extended ASCII range 128-255 contains additional Latin and accented characters.

Question 3

Can I copy characters to my clipboard?

Accepted Answer

Yes — click any row in the table to copy that character to your clipboard. A green flash confirms the copy. You can also use the character in HTML, JavaScript, Python or any code by referring to its hex or decimal code point (e.g. \u00A9 for © in JavaScript).

Question 4

What are HTML entities?

Accepted Answer

HTML entities are special codes that let you display reserved or special characters in HTML. They start with & and end with ; — for example & for &, < for <, > for >, © for © and for non-breaking space. Numeric entities use decimal (©) or hex (©) references. HTML entities are essential for displaying characters that have special meaning in HTML markup.