What is Base64 Encoding?
technologyDefinition
Base64 is an encoding scheme that converts binary data (files, images, strings) into a 64-character ASCII text format using A–Z, a–z, 0–9, +, and /. It is used to safely transmit binary data over text-based protocols like HTTP, email (MIME), and JSON APIs. Base64 output is always approximately 33% larger than the original input.
Detailed Explanation
Binary data contains bytes that can't be reliably transmitted over systems designed for text (because some byte values represent control characters). Base64 solves this by encoding every 3 bytes of binary data into 4 printable ASCII characters — making it safe for any text-based transmission.
Common use cases: embedding images directly in CSS/HTML as data URIs (background-image: url('data:image/png;base64,...')), encoding credentials in HTTP Basic Authentication headers, encoding file attachments in email (MIME format), and storing binary data in JSON APIs.
Base64 is NOT encryption — it is an encoding scheme. The data can be decoded by anyone with the encoded string. Never use Base64 for security-sensitive data without additional encryption.
🔐 Base64 Encoder
Encode text/files to Base64