Does this encoder support UTF-8 special characters and emojis?

Yes! Our implementation uses UTF-8 byte encoding so emojis, accents, and multilingual characters encode accurately.

Developer Tools

Base64 Encoder

Encode plain text, strings, and UTF-8 data into Base64 format with URL-safe encoding support.

URL-Safe Base64 Format (- and _ instead of + and /)

Plain Text (UTF-8)

Base64 Output

SGVsbG8gZnJvbSBab3ZsaSBIdWIhIPCfmoA=

About the Base64 Encoder

Base64 is a binary-to-text encoding scheme that translates binary data and strings into a 64-character ASCII representation. It is widely used in email MIME attachments, Basic Authentication headers, data URIs, and API tokens.

How to Use the Base64 Encoder

1Type or paste your plain text into the input field.
2Optionally toggle "URL-Safe Base64" (which replaces + and / with - and _).
3Click "Encode" to generate the Base64 output string.
4Copy the Base64 string or download it as a .txt file.

How It Works & Underlying Logic

The encoder groups 8-bit binary bytes of UTF-8 encoded text into 6-bit chunks, mapping each 6-bit value (0 to 63) to a corresponding character in the standard 64-character index table (A-Z, a-z, 0-9, +, /) with = padding.

Mathematical Formula / Rule3 bytes (24 bits) = 4 Base64 characters (4 × 6 bits)

Practical Calculation Examples

Text to Base64

Encoding greeting string

Input: Hello, World!

Output: SGVsbG8sIFdvcmxkIQ==

Basic Auth Header String

Encoding user credentials

Input: admin:secretpassword123

Output: YWRtaW46c2VjcmV0cGFzc3dvcmQxMjM=

Helpful Tips & Best Practices

•Base64 is an encoding format, NOT encryption: anyone can decode Base64 back to the original text without a key.
•Base64 encoding increases data size by approximately 33% compared to raw binary.

Base64 Encoder FAQ

No. Base64 is merely an encoding scheme for data transport. For security, passwords should always be hashed using cryptographic algorithms like bcrypt or Argon2.