Base64 Encoder & Decoder
A robust utility for binary-to-text encoding. Safely process sensitive data locally in your browser with full Unicode and URL-Safe variant support.
Base64 Encoder & Decoder
Understanding Base64 Encoding
What is it?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is widely used to embed images, certificates, or other binary data directly into text-based formats like HTML, CSS, JSON, or email (MIME).
Note: Base64 is not an encryption method. It is a simple encoding and can be easily reversed.
URL-Safe Variant
Standard Base64 uses + and /, which have special meanings in URLs. The URL-safe variant replaces them with - and _ respectively, making the output safe to use in query parameters or filenames without percent-encoding.
CuscusLab uses your browser's local computational power. Your data never touches our servers. 100% Private. 100% Secure.
Why use Base64?
Base64 encoding is essential for transmitting binary data over systems that only support text. It is commonly used in data URIs for images, embedding cryptographic keys in configuration files, and passing complex data structures throughURL parameters or HTTP headers.
Secure & Locally Processed
Unlike many online converters that send your text to a server, CuscusLab processes all Base64 conversions on your local machine. This ensures that your private keys, API tokens, or personal data never leave your browser, providing a high level of security and privacy.