Base-64 Encode a String
Quickly encode a string to base-64 encoding.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use Base-64 Encode a String
Type plain text or emojis.
Optionally enable URL-safe encoding for web tokens.
Copy encoded string.
Frequently Asked Questions
What is URL-safe Base64?
URL-safe Base64 replaces + with - and / with _ so strings can safely pass in URLs without URI encoding.
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