Enter text or upload a file to get its Base64 encoding.
Embed images directly in HTML/CSS as base64 data URIs, eliminating extra HTTP requests for small assets.
HTTP Basic Auth encodes credentials as base64. Many REST APIs use base64 for token and key transmission.
MIME email encodes binary attachments (images, PDFs) as base64 for reliable text-only transmission.
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using 64 characters (A-Z, a-z, 0-9, +, /). It is commonly used to embed images in HTML/CSS, encode email attachments, and transmit binary data in JSON or XML. Base64 increases data size by approximately 33%, but ensures safe transmission over media designed for text.