Base64 Encoder/Decoder
Encode and decode Base64 strings online
Base64 encoding converts binary data into ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's widely used in email attachments (MIME), JSON Web Tokens, data URIs, and API authentication. Our tool processes data entirely in your browser — nothing is uploaded to any server.
How to Use
Enter Input
Enter your input in the input area above.
Configure Options
Configure any options if available.
Process
Click the convert/process button.
Get Result
View the result in the output area.
Usage Examples
Encoding for API Authentication
Encode 'username:password' to 'dXNlcm5hbWU6cGFzc3dvcmQ=' for HTTP Basic Auth headers. Most REST APIs accept Base64-encoded credentials in the Authorization header.
Embedding Images in CSS
Convert a small icon to Base64 and embed it directly in your CSS: background-image: url(data:image/png;base64,iVBORw0KG...). Eliminates extra HTTP requests for small assets.
Data URI in HTML
Embed Base64-encoded SVG directly in an <img> tag for self-contained HTML documents that don't require external file dependencies.