base64-encoder

About base64-encoder

Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters. It is widely used in email attachments (MIME), embedding images in HTML/CSS using data URIs, storing binary data in JSON, and HTTP Basic Authentication headers.

When to Use Base64 Encoding?

Use Base64 encoding when you need to transmit binary data over a medium that only supports text. Common use cases include embedding images directly in HTML (), encoding file attachments in emails, storing cryptographic keys in configuration files, and encoding binary data in API responses.

How It Works

• ✓Each group of 3 bytes (24 bits) is split into 4 groups of 6 bits
• ✓Each 6-bit group maps to one of 64 characters (A-Z, a-z, 0-9, +, /)
• ✓Padding (=) is added when the input length is not divisible by 3
• ✓Output is always ~33% larger than the input

100% Free online tool — runs entirely in your browser. No data sent to any server. No login required.