Base64 Encoder
Encode text or binary data to Base64 online. Instantly convert plain text to Base64 format for use in APIs, data URIs, and email attachments.
Base64 Output
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string format. It is commonly used to transmit binary data over text-based protocols like HTTP, SMTP, or JSON.
How to use this tool
- Paste your plain text or string into the input field
- Click Encode to convert it to Base64
- Copy the output and use it wherever needed
Common use cases
- Encoding authentication credentials (Basic Auth headers)
- Embedding images inline in HTML or CSS as data URIs
- Encoding binary payloads in JSON API requests
- Encoding strings for URL-safe transmission
- Storing binary data in text-based formats like XML or JSON
Example
Input: Hello, World!
Output: SGVsbG8sIFdvcmxkIQ==
Notes
This tool handles non-ASCII characters (including Unicode, emoji, and international text) correctly by using UTF-8 encoding before applying Base64.
Privacy
All processing happens in your browser. Nothing is transmitted.