Base-64 Decode a String
Quickly decode base-64-encoded string.
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 Decode a String
Enter Base64 string.
View decoded plain text.
Copy text to clipboard.
Frequently Asked Questions
Does it auto-fix missing padding?
Yes, missing trailing = padding characters are automatically padded.
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