Base64 to ASCII Converter: Decode Base64 Text or File to ASCII

Decode Base64 text or files and convert them to ASCII format with ease. Discover the ease of use of the Base64 to ASCII Converter. Decode with confidence and gain control over your data manipulation.

What is Base64?

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

What is ASCII?

ASCII is an acronym that stands for “American Standard Code for Information Interchange“. It is a character encoding standard used in computers and communication equipment to represent text and control characters. ASCII assigns unique numerical codes to various characters, allowing text to be represented digitally using binary values.

What is Base64 Decoding?

Base64 decoding is the reverse process of converting Base64-encoded data back to its original binary form. Base64 encoding converts binary data into ASCII text, while decoding restores the original binary data for use in its native format. Many programming languages offer built-in functions for Base64 encoding and decoding.

How Does Base64 Decoding Work?

Base64 decoding works by taking a Base64-encoded string, which is a sequence of ASCII characters, and converting it back into its original binary form. Here’s a simplified explanation of how the process works:

1. Remove Padding: If the Base64-encoded string has padding characters (‘=’), remove them. Padding characters are added to ensure that the encoded data is a multiple of 4 characters, but they are not needed for decoding.
2. Convert Base64 Characters to Values: Each Base64 character in the encoded string is converted back to its value according to the Base64 character set. This is essentially the reverse lookup of the encoding process.
3. Convert decimal values to 6-bit form: Each decimal value must be converted to 6-bit form.
4. Concatenate 6-Bit Values: The resulting 6-bit values from step 2 are concatenated together to form a sequence of bits. This sequence of bits represents the binary data.
5. Divide Bits into Bytes: The concatenated bits are divided into groups of 8 bits (1 byte). If the number of bits is not a multiple of 8, trailing bits are ignored.
6. Convert Bytes to Original Data: Each group of 8 bits (byte) is then converted back to its original binary value. This process essentially reverses the original encoding steps, including the padding and concatenation.
7. Reconstruct Original Data: The bytes obtained from step 5 are concatenated together to reconstruct the original binary data.

Why Use Base64 Decoding?

Decoding Base64 is critical in digital communication and data manipulation. Encoded data may be encountered while transmitting data, transferring files, or working with cryptographic methods. By decoding Base64 data, you restore the capacity to interact with the original information, enabling smooth integration and meaningful use.

How Are ASCII Characters Used?

In computing, ASCII characters are used to represent text-based data. Each ASCII character is assigned a unique 7-bit binary code, allowing computers to store and exchange textual information. ASCII is a standard character encoding that includes letters, numerals, punctuation, and control characters, providing a common way for computers to interpret and display text.

How Do I Use the Free Online Base64 to ASCII Decoder?

1. In the input field, enter the text you want to decode or upload a file.
2. Customise the settings, you can set each line to be decoded separately.
3. No need to press a button, the ASCII result will automatically appear in the Output field.
4. If you want, you can copy the result using the Copy button.

How is ASCII Related to Base64 Decoding?

ASCII is the fundamental character encoding used in the Base64 decoding process for both input and output. Base64-encoded data can be successfully decoded back into its original binary format using a subset of ASCII characters. This transformation allows the data to be understood and effectively used within the ASCII character set.

Is it secure to use your Base64 Converter?

Absolutely. Our application is totally client-side, which means that all conversion procedures take place within your browser. No data is transferred to our systems, guaranteeing that your information is kept private and secure during the conversion process.

Base64 Characters

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

What Characters Are Included in ASCII?

Uppercase and lowercase letters, numerals, punctuation marks, special symbols, and control characters are all part of the ASCII standard. It covers a total of 128 characters, with each character associated with a unique 7-bit binary code.

Decimal	Hexadecimal	Binary	Character
0	0	0	NUL
1	1	1	SOH
2	2	10	STX
3	3	11	ETX
4	4	100	EOT
5	5	101	ENQ
6	6	110	ACK
7	7	111	BEL
8	8	1000	BS
9	9	1001	HT
10	0A	1010	LF
11	0B	1011	VT
12	0C	1100	FF
13	0D	1101	CR
14	0E	1110	SO
15	0F	1111	SI
16	10	10000	DLE
17	11	10001	DC1
18	12	10010	DC2
19	13	10011	DC3
20	14	10100	DC4
21	15	10101	NAK
22	16	10110	SYN
23	17	10111	ETB
24	18	11000	CAN
25	19	11001	EM
26	1A	11010	SUB
27	1B	11011	ESC
28	1C	11100	FS
29	1D	11101	GS
30	1E	11110	RS
31	1F	11111	US
32	20	100000	space
33	21	100001	!
34	22	100010	“
35	23	100011	#
36	24	100100	$
37	25	100101	%
38	26	100110	&
39	27	100111	‘
40	28	101000	(
41	29	101001	)
42	2A	101010	*
43	2B	101011	+
44	2C	101100	,
45	2D	101101	–
46	2E	101110	.
47	2F	101111	/
48	30	110000	0
49	31	110001	1
50	32	110010	2
51	33	110011	3
52	34	110100	4
53	35	110101	5
54	36	110110	6
55	37	110111	7
56	38	111000	8
57	39	111001	9
58	3A	111010	:
59	3B	111011	;
60	3C	111100	<
61	3D	111101	=
62	3E	111110	>
63	3F	111111	?
64	40	1000000	@
65	41	1000001	A
66	42	1000010	B
67	43	1000011	C
68	44	1000100	D
69	45	1000101	E
70	46	1000110	F
71	47	1000111	G
72	48	1001000	H
73	49	1001001	I
74	4A	1001010	J
75	4B	1001011	K
76	4C	1001100	L
77	4D	1001101	M
78	4E	1001110	N
79	4F	1001111	O
80	50	1010000	P
81	51	1010001	Q
82	52	1010010	R
83	53	1010011	S
84	54	1010100	T
85	55	1010101	U
86	56	1010110	V
87	57	1010111	W
88	58	1011000	X
89	59	1011001	Y
90	5A	1011010	Z
91	5B	1011011	[
92	5C	1011100	\
93	5D	1011101	]
94	5E	1011110	^
95	5F	1011111	_
96	60	1100000	`
97	61	1100001	a
98	62	1100010	b
99	63	1100011	c
100	64	1100100	d
101	65	1100101	e
102	66	1100110	f
103	67	1100111	g
104	68	1101000	h
105	69	1101001	i
106	6A	1101010	j
107	6B	1101011	k
108	6C	1101100	l
109	6D	1101101	m
110	6E	1101110	n
111	6F	1101111	o
112	70	1110000	p
113	71	1110001	q
114	72	1110010	r
115	73	1110011	s
116	74	1110100	t
117	75	1110101	u
118	76	1110110	v
119	77	1110111	w
120	78	1111000	x
121	79	1111001	y
122	7A	1111010	z
123	7B	1111011	{
124	7C	1111100	|
125	7D	1111101	}
126	7E	1111110	~
127	7F	1111111	DEL