HTTP Status Codes Cheat Sheet
The complete list of HTTP status codes, from 1xx to 5xx, with plain-English meanings, grouped for quick reference.
The complete list of HTTP status codes, from 1xx to 5xx, with plain-English meanings, grouped for quick reference.
Extracting a color palette from an image pulls out its main colors as a small set of swatches with their hex codes, so you can reuse the exact colors else
HTML entities are codes that let you show characters which would otherwise break a web page, so a less-than sign is written as < and an ampersand a
Binary coded decimal, or BCD, stores each decimal digit in its own four-bit group instead of converting the whole number to binary. So the decimal 25 in B
Editing CSV columns means extracting just the ones you need or deleting the ones you do not, without opening a spreadsheet or writing a script. A wide exp
Generating random bytes or hex strings gives you unpredictable values for keys, tokens, test data, and salts, written either as raw byte numbers or as a c
Adding text, a border, or a background to an image are three of the most common quick edits, useful for captions, watermarks, framing, and filling transpa
A Unicode code point is the number assigned to a character, written as U+ followed by hex, so A is U+0041 and a smiley is U+1F600. A Unicode escape is tha
Octal is the base-8 number system, using only the digits 0 to 7, and it maps to binary in clean groups of three bits. Converting octal to binary, decimal,
AES is the encryption standard that scrambles text into unreadable ciphertext, which only someone with the right password can turn back into the original.
Changing a CSV delimiter swaps the character that separates columns, most often switching between commas and tabs, which is the difference between a CSV a
Generating random IP and MAC addresses gives you valid-looking network identifiers for testing, documentation, and demos without using real ones. An IP ad