How to Encode Base64

1

Enter Text

Type or paste the text, string, or data you want to encode.

2

Click Encode

Press the encode button for instant Base64 conversion.

3

Copy Result

Copy the Base64 encoded string for use in your code, API, or data.

Understanding Base64 Encoding

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is widely used in web development for encoding credentials in HTTP Basic Authentication, embedding images directly in CSS/HTML (data URIs), encoding email attachments (MIME), and transmitting binary data through text-only protocols.

Base64 encoding converts each group of three bytes (24 bits) into four printable ASCII characters (6 bits each). The resulting string is approximately 33% larger than the original data but is safe for transmission through systems that only support text characters. This encoding is not encryption — it is easily reversible and should not be used for security purposes.

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Web Development

Encode data URIs, API credentials, and embedded content for web apps.

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Email Attachments

Base64 is the standard encoding for MIME email attachments.

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API Integration

Many APIs require Base64 encoding for authentication tokens and data payloads.

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Data Transfer

Safely transmit binary data through text-only channels and protocols.

FAQ

Is Base64 encoding the same as encryption?▼

No. Base64 is an encoding scheme, not encryption. It is easily reversible and provides no security. Never use Base64 to protect sensitive data.

Why is Base64 output larger than the input?▼

Base64 represents 6 bits per character instead of 8, making the output approximately 33% larger. This overhead is the cost of converting binary to text-safe format.

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