Base64 Encoder/Decoder

Encode and decode Base64 strings instantly.

Input

MIME Type:

Input Method:

Enter text to encode:

Base64 Encoded

Encoded result (Data URL):

Base64 Input

Enter Base64 text to decode:

Decoded Output

Decoded result:

About Base64 Encoding

Base64 Encoding is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used in web development and data transmission.

Common Use Cases

Encoding images in HTML/CSS via Data URLs
Data URLs for web resources
Email attachments (MIME)
API authentication tokens
Storing binary data in text format
JWT tokens and credentials

Key Features

Converts binary to ASCII text
Uses A-Z, a-z, 0-9, +, / characters
Padding with = characters
Increases data size by ~33%
Reversible encoding
Safe for text-based protocols

MIME Types and Base64

Base64 encoding is commonly used with MIME types for embedding data in HTML, CSS, and other text formats. Common MIME types:

image/png - PNG images
image/jpeg - JPEG images
image/gif - GIF images
image/webp - WebP images
image/svg+xml - SVG images
audio/mpeg - MP3 audio
video/mp4 - MP4 video
application/pdf - PDF documents
application/json - JSON data
text/plain - Plain text
font/woff2 - Web fonts
application/zip - ZIP archives

Example data URL: data:image/png;base64,iVBORw0KGgo...