# How much bigger is Base64 encoded data?

## How much bigger is Base64 encoded data?

base64 encoding makes file sizes roughly 33% larger than their original binary representations, which means more data down the wire (this might be exceptionally painful on mobile networks)

## How long are Base64 encoded strings?

Base64 encodes three bytes to four characters. Sometimes, padding is added in the form of one or two ‘=’ characters.

Does Base64 encoding reduce size?

For example, BASE64 is representing data using 6 bits (26, hence 64) of characters to represent longer data sequences (the sometimes-appearing “==” at the end is padding for alignment). There is no encoding that “reduces size.” Encodings are just mappings of bits to the character they represent.

Is Base64 encoded PHP?

PHP | base64_encode() Function. The base64_encode() function is an inbuilt function in PHP which is used to Encodes data with MIME base64. MIME (Multipurpose Internet Mail Extensions) base64 is used to encode the string in base64. The base64_encoded data takes 33% more space then original data.

### How long is Base64 image?

base64-encoding is approximately 4/3 the original size, due to how the bits are packed. So a 200Kb jpg will be about 266Kb in its base64-encoded form.

### Is Base64 encoding smaller than binary?

Base64-encoded data is always a third larger than the raw binary equivalent because a single byte from the Base64 alphabet can only represent six bits of information. Because a byte actually contains eight bits, this effectively means two bits out of every byte are lost to bureaucracy. Much worse: 108,596 bytes.

How do I find the length of a Base64?

Each Base64 digit represents exactly 6 bits of data. So, three 8-bits bytes of the input string/binary file (3×8 bits = 24 bits) can be represented by four 6-bit Base64 digits (4×6 = 24 bits). This means that the Base64 version of a string or file will be at least 133% the size of its source (a ~33% increase).

What is Base64 encoded format?

In programming, Base64 is a group of binary-to-text encoding schemes that represent binary data (more specifically, a sequence of 8-bit bytes) in an ASCII string format by translating the data into a radix-64 representation. Each non-final Base64 digit represents exactly 6 bits of data.

#### Does Base64 encoding increase size?

Encoded size increase This means that the Base64 version of a string or file will be at least 133% the size of its source (a ~33% increase). The increase may be larger if the encoded data is small.

#### How do I reduce the length of a Base64 string?

1. use a higher base (although you’ll need to write the encode/decode manually, and you’ll still only be able to get to about base-90 or something, so you won’t drastically reduce the size)
2. use a pure binary post body rather than base-anything (this is effectively base-256)
3. have less data.
4. use multiple requests.

How base64 encode in PHP?

This can be done with the help of file_get_contents() function of PHP. Then pass this raw data to base64_encode() function to encode. Required Function: base64_encode() Function The base64_encode() function is an inbuilt function in PHP which is used to Encodes data with MIME base64.

How base64 encode PDF in PHP?

I am using an API where I can send a document to something like dropbox. According to the documentation, the file which is sent needs to be BASE64 encoded data. \$b64Doc = chunk_split(base64_encode(\$this->pdfdoc));

## How many characters are in a base 64 encoded string?

A base 64 encoded string will use 4 characters for every 3 bytes (or part thereof). So 128 bytes would be 172 base 64 characters. If you need to check this programatically, you can do so by checking the modulus.

## How big is the buffer size in PHP?

Finally, PHP’s default buffer size is 8192 bytes – enough for 143 MIME lines’ worth of input. So if you read from the input file in chunks of 8151 (=57*143) bytes you will get (up to) 8151 eight-bit symbols, which encode as exactly 10868 six-bit symbols, which then wrap to exactly 143 MIME-formatted lines.

How many characters are needed to encode a chunk in PHP?

Reading the input file in chunks that are a multiple of three bytes in length results in a chunk that can be encoded independently of the rest of the input file. MIME additionally enforces a line length of 76 characters plus the CRLF. 76 characters is enough for 19 quadruples of six-bit symbols thus representing 19 triples of eight-bit symbols.

How many characters are in 128 bytes of data?

(Padding is applied for binary data which isn’t an exact multiple of 3 bytes.) So 128 bytes will always be 172 characters. (The way to work this out is that base64 represents 6 bits in each character (2 6 = 64); therefore 3 bytes = 24 bits = 4 base-64 characters.)