Is Base64 encoding the same as encryption?
No. Base64 is encoding, not encryption. Anyone with the Base64 string can decode it instantly. Never use Base64 as a security measure — use it only to change the representation of data for transmission.
Base64 Encoder converts any text or string into Base64 encoded format instantly in your browser. Developers use Base64 encoding to create HTTP Basic Authentication headers (username:password → Base64), embed images as data URLs in HTML and CSS, encode binary data for JSON API payloads, and encode configuration values for environment variables. No file uploads, no server processing — runs entirely in your browser.
Base64 encoding converts bytes into a set of 64 printable ASCII characters (A-Z, a-z, 0-9, +, /) that can safely pass through any text-based protocol. Every 3 bytes of input become 4 Base64 characters. Padding (=) is added when the input length is not a multiple of 3.
No. Base64 is encoding, not encryption. Anyone with the Base64 string can decode it instantly. Never use Base64 as a security measure — use it only to change the representation of data for transmission.
Combine username and password as username:password, then encode the result to Base64. Add it to your request header as: Authorization: Basic <encoded_value>.
The = padding characters ensure the output length is always a multiple of 4 characters. One = means 1 byte of padding; == means 2 bytes of padding.
No. Encoding runs entirely in your browser using the built-in btoa() function. Your data never leaves your device.
Yes. The tool handles Unicode text by converting it to UTF-8 bytes before encoding. This matches how most modern APIs and services process Base64 data.
Yes, completely free. No login, no limits.
Tool workspace
Free Base64 encoder online — instantly convert text, credentials, or any string to Base64. Perfect for HTTP Basic Auth headers, data URLs, and API payloads. No upload required.
Output
Input
admin:password123
Output
YWRtaW46cGFzc3dvcmQxMjM=