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Base64 Encode / Decode
Convert text and files to/from Base64
Invalid Base64 string
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What is Base64?
Base64 is an encoding scheme that converts binary data into ASCII text format. It's commonly used to embed images in HTML/CSS, encode email attachments, and transmit data over text-based protocols.
Common Uses
- Data URIs - Embed images directly in HTML/CSS
- API Data - Send binary data in JSON
- Email Attachments - Encode files for email transmission
- URL Encoding - Safely include data in URLs
Example
Original: Hello World
Base64: SGVsbG8gV29ybGQ=
Frequently Asked Questions
No, Base64 is encoding, not encryption. It converts data to a different format but doesn't provide security. Anyone can decode Base64 data. For security, use proper encryption methods.
Base64 encoding increases data size by approximately 33% because it converts 3 bytes of binary data into 4 ASCII characters. This trade-off allows binary data to be safely transmitted as text.
A Data URI is a way to embed file data directly in HTML or CSS. It starts with "data:" followed by the MIME type, then ";base64,", then the Base64-encoded data. Example:
data:image/png;base64,iVBORw0K...