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. Zero egress.
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.
Type plain text or emojis.
Optionally enable URL-safe encoding for web tokens.
Copy encoded string.
URL-safe Base64 replaces + with - and / with _ so strings can safely pass in URLs without URI encoding.
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