Base64 Encoder/Decoder Tool

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using 64 different printable characters. It ensures data remains intact during transport over text-based systems like email or web protocols.

Why Use Base64?

Safely encode binary data like images, files, or code.
Transfer data over systems that only support text (like JSON, XML, or HTML).
Embed image data directly in HTML or CSS using data URIs.

Advanced Options

Character Set: Uses UTF-8 by default for input/output encoding.
Newline Separator: Choose between Unix (\n) or Windows (\r\n)...
Encode Each Line Separately: Processes and encodes each line independently.
Split Lines Into Chunks: Breaks output into 76-character lines (RFC 2045).
URL-safe Encoding: Uses - and _ instead of + and /.
Live Mode: Enables in-browser encoding/decoding without sending data to a server.

Security and Privacy

All encoding/decoding occurs in your browser. No data is sent or stored unless you upload a file. Any temporary processing files are auto-deleted after use.

How Base64 Encoding Works

Base64 groups 3 bytes of binary data (24 bits) and splits them into 4 chunks of 6 bits. Each 6-bit chunk maps to a Base64 character.

Text:      M   a   n
ASCII:    77  97  110
Binary:   01001101 01100001 01101110
Groups:   010011 010110 000101 101110
Indexes:  19     22     5      46
Base64:   T      W      F      u

Character Set Reference

The complete Base64 character set includes:

ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/

Base64 Index Table

Index	Char	Index	Char	Index	Char	Index	Char
0	A	16	Q	32	g	48	w
1	B	17	R	33	h	49	x
2	C	18	S	34	i	50	y
3	D	19	T	35	j	51	z
4	E	20	U	36	k	52	0
5	F	21	V	37	l	53	1
6	G	22	W	38	m	54	2
7	H	23	X	39	n	55	3
8	I	24	Y	40	o	56	4
9	J	25	Z	41	p	57	5
10	K	26	a	42	q	58	6
11	L	27	b	43	r	59	7
12	M	28	c	44	s	60	8
13	N	29	d	45	t	61	9
14	O	30	e	46	u	62	+
15	P	31	f	47	v	63	/

Try It Yourself

Use the tool above to start encoding or decoding Base64 instantly. Whether you're working with text, files, or URLs, this tool helps you process your data quickly and securely.

Base64 Encoder And Decoder FAQs

What is Base64 encoding?

Base64 is a method of encoding binary data into an ASCII string format using 64 different printable characters.

Why should I use Base64?

Base64 is useful for safely transmitting binary data over text-based protocols like JSON, XML, or HTML.

Is Base64 encoding reversible?

Yes, Base64 encoding can be easily reversed to retrieve the original binary data.

Does Base64 increase file size?

Yes, Base64 encoding increases the size of the data by approximately 33%.

Credits

Tool built and maintained by CodeAiKit. Made for speed, simplicity, and privacy.

Advanced Options

Character Set: Uses UTF-8 by default for input/output encoding.

Newline Separator: Choose between Unix (\n) or Windows (\r\n)...

Encode Each Line Separately: Processes and encodes each line independently.

Split Lines Into Chunks: Breaks output into 76-character lines (RFC 2045).

URL-safe Encoding: Uses - and _ instead of + and /.

Live Mode: Enables in-browser encoding/decoding without sending data to a server.

How Base64 Encoding Works

Base64 groups 3 bytes of binary data (24 bits) and splits them into 4 chunks of 6 bits. Each 6-bit chunk maps to a Base64 character.

Text: M a n ASCII: 77 97 110 Binary: 01001101 01100001 01101110 Groups: 010011 010110 000101 101110 Indexes: 19 22 5 46 Base64: T W F u

Index

Char

Index

Char

Index

Char

Index

Char

Try It Yourself

Use the tool above to start encoding or decoding Base64 instantly. Whether you're working with text, files, or URLs, this tool helps you process your data quickly and securely.

Base64 Encoder And Decoder FAQs

What is Base64 encoding?

Base64 is a method of encoding binary data into an ASCII string format using 64 different printable characters.

Why should I use Base64?

Base64 is useful for safely transmitting binary data over text-based protocols like JSON, XML, or HTML.

Is Base64 encoding reversible?

Yes, Base64 encoding can be easily reversed to retrieve the original binary data.

Does Base64 increase file size?

Yes, Base64 encoding increases the size of the data by approximately 33%.

Base64 Encoder And Decoder

What is Base64 Encoding?

Why Use Base64?

Advanced Options

Security and Privacy

How Base64 Encoding Works

Character Set Reference

Base64 Index Table

Try It Yourself

Base64 Encoder And Decoder FAQs

Credits

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Base64 Encoder And Decoder

What is Base64 Encoding?

Why Use Base64?

Advanced Options

Security and Privacy

How Base64 Encoding Works

Character Set Reference

Base64 Index Table

Try It Yourself

Base64 Encoder And Decoder FAQs

Credits

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Index	Char	Index	Char	Index	Char	Index	Char
0	A	16	Q	32	g	48	w
1	B	17	R	33	h	49	x
2	C	18	S	34	i	50	y
3	D	19	T	35	j	51	z
4	E	20	U	36	k	52	0
5	F	21	V	37	l	53	1
6	G	22	W	38	m	54	2
7	H	23	X	39	n	55	3
8	I	24	Y	40	o	56	4
9	J	25	Z	41	p	57	5
10	K	26	a	42	q	58	6
11	L	27	b	43	r	59	7
12	M	28	c	44	s	60	8
13	N	29	d	45	t	61	9
14	O	30	e	46	u	62	+
15	P	31	f	47	v	63	/

Index	Char	Index	Char	Index	Char	Index	Char
0	A	16	Q	32	g	48	w
1	B	17	R	33	h	49	x
2	C	18	S	34	i	50	y
3	D	19	T	35	j	51	z
4	E	20	U	36	k	52	0
5	F	21	V	37	l	53	1
6	G	22	W	38	m	54	2
7	H	23	X	39	n	55	3
8	I	24	Y	40	o	56	4
9	J	25	Z	41	p	57	5
10	K	26	a	42	q	58	6
11	L	27	b	43	r	59	7
12	M	28	c	44	s	60	8
13	N	29	d	45	t	61	9
14	O	30	e	46	u	62	+
15	P	31	f	47	v	63	/

Index	Char	Index	Char	Index	Char	Index	Char
0	A	16	Q	32	g	48	w
1	B	17	R	33	h	49	x
2	C	18	S	34	i	50	y
3	D	19	T	35	j	51	z
4	E	20	U	36	k	52	0
5	F	21	V	37	l	53	1
6	G	22	W	38	m	54	2
7	H	23	X	39	n	55	3
8	I	24	Y	40	o	56	4
9	J	25	Z	41	p	57	5
10	K	26	a	42	q	58	6
11	L	27	b	43	r	59	7
12	M	28	c	44	s	60	8
13	N	29	d	45	t	61	9
14	O	30	e	46	u	62	+
15	P	31	f	47	v	63	/

Index	Char	Index	Char	Index	Char	Index	Char
0	A	16	Q	32	g	48	w
1	B	17	R	33	h	49	x
2	C	18	S	34	i	50	y
3	D	19	T	35	j	51	z
4	E	20	U	36	k	52	0
5	F	21	V	37	l	53	1
6	G	22	W	38	m	54	2
7	H	23	X	39	n	55	3
8	I	24	Y	40	o	56	4
9	J	25	Z	41	p	57	5
10	K	26	a	42	q	58	6
11	L	27	b	43	r	59	7
12	M	28	c	44	s	60	8
13	N	29	d	45	t	61	9
14	O	30	e	46	u	62	+
15	P	31	f	47	v	63	/

Base64 Encoder And Decoder

What is Base64 Encoding?

Why Use Base64?

Advanced Options

Security and Privacy

How Base64 Encoding Works

Character Set Reference

Base64 Index Table

Try It Yourself

Base64 Encoder And Decoder FAQs

Credits

Related Development Tools

JSON Formatter / Minifier

HTML Formatter / Minifier

CSS Formatter / Beautifier / Minifier

JavaScript Formatter / Beautifier / Minifier

Enjoyed this tool?

Base64 Encoder And Decoder

What is Base64 Encoding?

Why Use Base64?

Advanced Options

Security and Privacy

How Base64 Encoding Works

Character Set Reference

Base64 Index Table

Try It Yourself

Base64 Encoder And Decoder FAQs

Credits

Related Development Tools

JSON Formatter / Minifier

HTML Formatter / Minifier

CSS Formatter / Beautifier / Minifier

JavaScript Formatter / Beautifier / Minifier

Enjoyed this tool?

Index	Char	Index	Char	Index	Char	Index	Char
0	A	16	Q	32	g	48	w
1	B	17	R	33	h	49	x
2	C	18	S	34	i	50	y
3	D	19	T	35	j	51	z
4	E	20	U	36	k	52	0
5	F	21	V	37	l	53	1
6	G	22	W	38	m	54	2
7	H	23	X	39	n	55	3
8	I	24	Y	40	o	56	4
9	J	25	Z	41	p	57	5
10	K	26	a	42	q	58	6
11	L	27	b	43	r	59	7
12	M	28	c	44	s	60	8
13	N	29	d	45	t	61	9
14	O	30	e	46	u	62	+
15	P	31	f	47	v	63	/

Index	Char	Index	Char	Index	Char	Index	Char
0	A	16	Q	32	g	48	w
1	B	17	R	33	h	49	x
2	C	18	S	34	i	50	y
3	D	19	T	35	j	51	z
4	E	20	U	36	k	52	0
5	F	21	V	37	l	53	1
6	G	22	W	38	m	54	2
7	H	23	X	39	n	55	3
8	I	24	Y	40	o	56	4
9	J	25	Z	41	p	57	5
10	K	26	a	42	q	58	6
11	L	27	b	43	r	59	7
12	M	28	c	44	s	60	8
13	N	29	d	45	t	61	9
14	O	30	e	46	u	62	+
15	P	31	f	47	v	63	/