language	Base64 encode	Base64 decode
Java	base64 = new BASE64Encoder().encode(str.getBytes());	str = new String(new BASE64Decoder().decodeBuffer(base64));
JavaScript	base64 = btoa(str); Or var s = CryptoJS.enc.Utf8.parse(str); base64 = CryptoJS.enc.Base64.stringify(s);	str = atob(base64); Or var s = CryptoJS.enc.Base64.parse(base64); str = s.toString(CryptoJS.enc.Utf8);
PHP	$base64 = base64_encode($str);	$str = base64_decode($base64);
C#/.NET	byte[] bytes = System.Text.Encoding.UTF8.GetBytes(str); base64 = System.Convert.ToBase64String(bytes);	byte[] bytes = System.Convert.FromBase64String(base64); str = System.Text.Encoding.UTF8.GetString(bytes);
Python	import base64 base64 = base64.b64encode(str)	import base64 str = base64.b64decode(base64)
Perl	use MIME::Base64; $base64 = encode_base64($str);	use MIME::Base64; $str = decode_base64($base64);
Golang	import b64 "encoding/base64" ... base64 := b64.StdEncoding.EncodeToString([]byte(str))	import b64 "encoding/base64" ... str := b64.StdEncoding.DecodeString(base64)
Ruby	require "base64" base64 = Base64.encode64(str)	require "base64" str = Base64.decode64(base64)
MySQL/MariaDB	SELECT TO_BASE64(str);	SELECT FROM_BASE64(base64);
PostgreSQL	SELECT encode(str, 'base64');	SELECT decode(base64, 'base64');
Linux Shell (example is test)	$ echo test | base64	$ echo dGVzdAo= | base64 -d