🔐 Base64 Encoder / Decoder

About Base64

Base64 represents binary data using 64 printable ASCII characters. It is used wherever binary content must survive a text-only channel — email attachments, data URIs, JSON payloads and HTTP basic authentication headers.

Important

• Base64 is encoding, not encryption — anyone can decode it
• Encoded output is roughly 33% larger than the original data
• This tool handles Unicode correctly via UTF-8 conversion

Example