Encode - decode online

Url encode
Encoding a string to be used in a query part of a URL
Url decode
Decodes any %## encoding in the given string. Plus symbols ('+') are decoded to a space character

Base64 encode
Encodes data with MIME base64
Base64 decode
Decodes data encoded with MIME base64

HTML Entities
Converts characters to HTML entities
HTML entity decode
Converts HTML entities to characters

MD5 encode
Calculates the MD5 hash of a string
Str_rot13
Performs the ROT13 encoding on a string

Json encode
Returns the JSON representation of a value
Json decode
Decodes a JSON string

Bin2Hex
Converts a string of ASCII characters to hexadecimal values
Hex2Bin
Converts a string of hexadecimal values to ASCII characters

Quoted printable encode
Converts an 8-bit string to a quoted printable string
Quoted printable decode
Converts a quoted-printable string to an 8-bit string