Base64 Encode/Decode Tool
Quickly encode text to Base64 or decode Base64 back to text with our powerful online tool
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📚 About Base64 Encoding
What is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format by translating it into a radix-64 representation.
Common Uses
Used in email (MIME), embedding binary files in text (like images in HTML/CSS), and encoding authentication credentials.
How It Works
Every 3 bytes (24 bits) of binary data is converted into 4 ASCII characters from a set of 64 (A-Z, a-z, 0-9, '+', '/').
URL-Safe Variant
Standard Base64 uses '+' and '/' which need encoding in URLs. The URL-safe version replaces these with '-' and '_'.
📋 Base64 Examples
Original Text:
Hello, World!
Base64 Encoded:
SGVsbG8sIFdvcmxkIQ==
Original JSON:
{
"name": "John Doe",
"age": 30,
"city": "New York"
}
Base64 Encoded:
ewogICJuYW1lIjogIkpvaG4gRG9lIiwKICAiYWdlIjogMzAsCiAgImNpdHkiOiAiTmV3IFlvcmsiCn0=
Image Data (simplified):
PNG header + binary data
Base64 Encoded (first part):
iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAABGdBTUEAALGPC...
Basic Auth Credentials:
username:password
Base64 Encoded:
dXNlcm5hbWU6cGFzc3dvcmQ=
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