Group of binary-to-text encoding schemes using 64 symbols (plus padding)
In computer programming, Base64 is a group of binary-to-text encoding schemes that transforms binary data into a sequence of printable characters, limited to a set of 64 unique characters. More specifically, the source binary data is taken 6 bits at a time, then this group of 6 bits is mapped to one of 64 unique characters.
As with all binary-to-text encoding schemes, Base64 is designed to carry data stored in binary formats across channels that only reliably support text content. Base64 is particularly prevalent on the World Wide Web[1] where one of its uses is the ability to embed image files or other binary assets inside textual assets such as HTML and CSS files.[2]
Base64 is also widely used for sending e-mail attachments, because SMTP – in its original form – was designed to transport 7-bit ASCII characters only. Encoding an attachment as Base64 before sending, and then decoding when received, assures older SMTP servers will not interfere with the attachment.
Base64 encoding causes an overhead of 33–37% relative to the size of the original binary data (33% by the encoding itself; up to 4% more by the inserted line breaks).
^"Base64 encoding and decoding – Web APIs". MDN Web Docs. Archived from the original on 2014-11-11.
^"When to base64 encode images (and when not to)". 28 August 2011. Archived from the original on 2023-08-29.
In computer programming, Base64 is a group of binary-to-text encoding schemes that transforms binary data into a sequence of printable characters, limited...
data is Base64-encoded, then the data part may contain only valid Base64 characters. Note that Base64-encoded data: URIs use the standard Base64 character...
form of Authorization: Basic <credentials>, where <credentials> is the Base64 encoding of ID and password joined by a single colon :. It was originally...
MIME, files that might have been uuencoded are instead transferred with Base64 encoding. A uuencoded file starts with a header line of the form: begin...
numbers, similar to the way Base64 works. The October 2006 proposed Internet standard RFC 4648 documents base16, base32 and base64 encodings. It includes two...
the quoted-printable encoding, or "B" denoting base64 encoding. encoded text is the Q-encoded or base64-encoded text. An encoded-word may not be more than...
eight bits per ASCII character), it is more efficient than uuencode or Base64, which use four characters to represent three bytes of data (1⁄3 increase...
UVWXYZabcdefghijklmnopqrstuvwxyz0123456789, which differs from RFC 4648 Base64 encoding. $2$ (1999) The original bcrypt specification defined a prefix...
0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+/ = 64 characters = base64 The Base62 index table: List of numeral systems Kejing He; Xiancheng Xu;...
video is identified by an eleven-character case-sensitive alphanumerical Base64 string in the Uniform Resource Locator (URL) which can contain letters,...
than the combination of other Unicode encodings with quoted-printable or base64 for almost all types of text (see "Seven-bit environments" below). Text...
binary to text encoding belonging to the same family as Base32, Base58, and Base64. In this case, data is broken into 4-bit sequences, and each value (between...
embedded in the vCard as a Base64 encoded block of text. 2.1: KEY;PGP:http://example.com/key.pgp 2.1: KEY;PGP;ENCODING=BASE64:[base64-data] 3.0: KEY;TYPE=PGP:http://example...
for example, Base64). Encoding the data has the disadvantage of increasing the file size during the transfer (for example, using Base64 will increase...
openssl asn1parse -i -in your_request.p10 A CSR may be represented as a Base64 encoded PKCS#10; an example of which is given below: -----BEGIN CERTIFICATE...
gadolinium, a lanthanide 64 Angelina (asteroid 64), a main-belt asteroid Base64 encoding Commodore 64 (in 8-bit home computers, a common shorthand is 64)...
storage formats. The technique employs a special encoding scheme, such as base64, to ensure that delimiter or other significant characters do not appear...
log("Connection closed due to error") } </script> from socket import socket from base64 import b64encode from hashlib import sha1 MAGIC = b"258EAFA5-E914-47DA-95CA-C5AB0DC85B11"...
"Content-Transfer-Encoding: base64" https://hostname.tld/.well-known/est/simpleenroll The issued certificate, returned as a Base64 encoded PKCS#7 message,...
and related information. Supports raster data embedding with the use of Base64. List of codecs Adobe: DNG Specification Adobe: Introducing the Digital...
printable for mostly 7-bit content with a few characters outside that range and base64 for arbitrary binary data. The 8BITMIME and BINARY extensions were introduced...
to an HTTP server and then sending a link to the content along with its Base64 encoded thumbnail, if applicable. WhatsApp uses a "store and forward" mechanism...
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