Online Base64 File Encoder: Convert Files to Base64

The Online Base64 File Encoder is a convenient tool that allows you to effortlessly transform various types of files into Base64-encoded strings. With this user-friendly online encoder, you can quickly convert files into Base64 format.

Base64 File Decoder ⇄

Base64 File Encoder

Upload a File

Settings

Split lines into 76 character chunks (recommended for MIME)

Output Format: Base64 Value Data URI

Base64 Encoded File

What is Base64?

Base64 is a method of encoding binary data into ASCII characters to facilitate data transfer and storage.

What is Base64 Encoding?

Encoding, in general, refers to the process of converting data from one format to another.

Base64 encoding is achieved by representing binary data with a set of 64 different ASCII characters. This encoding is particularly useful when data needs to be exchanged between systems that do not natively support binary data.

How Does Base64 Encoding Work?

Base64 encoding works on a simple principle: it divides binary data into 6-bit chunks and maps these chunks to ASCII characters. This produces a text-based representation that can be safely transmitted across multiple systems.

How Do I Use the Free Online Base64 File Encoder?

To get started, upload a file that you want to encode.
Customise the settings, you can set each line to be encoded separately or the format of the output result.
No need to press a button, the Base64 result will automatically appear in the Output field.
If you want, you can copy the result using the Copy button.

Is Base64 an Encryption?

It should be noted that Base64 encoding is not a type of encryption. While it changes the way data is represented, it does not provide security or confidentiality. The goal of Base64 encoding is to ensure data compatibility and to avoid problems with binary data transmission.

Is it secure to use your Base64 File Converter?

Absolutely. Our program operates entirely on the client side, which means all the conversion processes occur within your browser. No data is sent to our servers, ensuring that your information remains under your control and confidential throughout the conversion process.

Base64 Characters and Table

Uppercase letters (A-Z), lowercase letters (a-z), digits (0-9), and two additional characters, typically “+” and “/”, comprise the set of 64 ASCII characters used in Base64 encoding. When the length of the binary data is not a multiple of three bytes, the “=” character is also used for padding.

Value	Character	Binary Value
0	A	000000
1	B	000001
2	C	000010
3	D	000011
4	E	000100
5	F	000101
6	G	000110
7	H	000111
8	I	001000
9	J	001001
10	K	001010
11	L	001011
12	M	001100
13	N	001101
14	O	001110
15	P	001111
16	Q	010000
17	R	010001
18	S	010010
19	T	010011
20	U	010100
21	V	010101
22	W	010110
23	X	010111
24	Y	011000
25	Z	011001
26	a	011010
27	b	011011
28	c	011100
29	d	011101
30	e	011110
31	f	011111
32	g	100000
33	h	100001
34	i	100010
35	j	100011
36	k	100100
37	l	100101
38	m	100110
39	n	100111
40	o	101000
41	p	101001
42	q	101010
43	r	101011
44	s	101100
45	t	101101
46	u	101110
47	v	101111
48	w	110000
49	x	110001
50	y	110010
51	z	110011
52	0	110100
53	1	110101
54	2	110110
55	3	110111
56	4	111000
57	5	111001
58	6	111010
59	7	111011
60	8	111100
61	9	111101
62	+	111110
63	/	111111