Lowercase
Lowercase - quick reference
Lowercase letters occupy ASCII codes 97-122 (a-z), exactly 32 positions above their uppercase counterparts at 65-90. This offset was deliberate: adding 32 (or flipping bit 5) converts uppercase to lowercase in a single CPU operation. Try this in our base converter - "A" is 01000001 and "a" is 01100001, differing only in bit 5.
Case sensitivity varies by context. URLs are case-sensitive in the path portion (RFC 3986). DNS names are case-insensitive. Most Unix filesystems are case-sensitive ("File.txt" and "file.txt" are different). Email local parts (before @) are technically case-sensitive per RFC 5321, but almost no mail server enforces it. Browse all lowercase characters in the ASCII alphabet characters group or use the text converter for case transformations.
Case sensitivity varies by context. URLs are case-sensitive in the path portion (RFC 3986). DNS names are case-insensitive. Most Unix filesystems are case-sensitive ("File.txt" and "file.txt" are different). Email local parts (before @) are technically case-sensitive per RFC 5321, but almost no mail server enforces it. Browse all lowercase characters in the ASCII alphabet characters group or use the text converter for case transformations.