🍋 Privacy & Security

Base64 Encoder / Decoder

Encode and decode Base64 with URL-safe variants

Free Browser-only No sign-up

Input

chars words sentences lines

Second Input

Results

Result

About Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings. Supports standard (RFC 4648) and URL-safe variants. Shows data URI format, byte size, and encoding overhead.

Step by Step

1 1
2 .
3
4 E
5 n
6 t
7 e
8 r
9
10 t
11 e
12 x
13 t
14
15 t
16 o
17
18 e
19 n
20 c
21 o
22 d
23 e
24
25 o
26 r
27
28 a
29
30 B
31 a
32 s
33 e
34 6
35 4
36
37 s
38 t
39 r
40 i
41 n
42 g
43
44 t
45 o
46
47 d
48 e
49 c
50 o
51 d
52 e
53
54 2
55 .
56
57 M
58 o
59 d
60 e
61
62 i
63 s
64
65 a
66 u
67 t
68 o
69 -
70 d
71 e
72 t
73 e
74 c
75 t
76 e
77 d
78
79 (
80 o
81 r
82
83 c
84 h
85 o
86 o
87 s
88 e
89
90 e
91 n
92 c
93 o
94 d
95 e
96 /
97 d
98 e
99 c
100 o
101 d
102 e
103 )
104
105 3
106 .
107
108 V
109 i
110 e
111 w
112
113 s
114 t
115 a
116 n
117 d
118 a
119 r
120 d
121
122 a
123 n
124 d
125
126 U
127 R
128 L
129 -
130 s
131 a
132 f
133 e
134
135 B
136 a
137 s
138 e
139 6
140 4
141
142 v
143 a
144 r
145 i
146 a
147 n
148 t
149 s
150
151 4
152 .
153
154 C
155 o
156 p
157 y
158
159 t
160 h
161 e
162
163 r
164 e
165 s
166 u
167 l
168 t
169
170 o
171 r
172
173 d
174 a
175 t
176 a
177
178 U
179 R
180 I
181
182 f
183 o
184 r
185 m
186 a
187 t

Tips

Base64 increases size by ~33% — every 3 bytes become 4 characters
URL-safe Base64 replaces + with - and / with _ to avoid URL encoding issues
Data URIs (data:text/plain;base64,...) embed content directly in HTML/CSS

Frequently Asked Questions

Is Base64 encryption?

No. Base64 is encoding, not encryption — it's trivially reversible. Never use it to hide sensitive data. It's meant for safe transport of binary data in text-based systems.

When should I use Base64?

Email attachments (MIME), embedding images in CSS/HTML (data URIs), storing binary in JSON/XML, and HTTP Basic Authentication headers.