Base64 Encoder and Decoder
Encode UTF-8 text to Base64 or decode Base64 strings with URL-safe (RFC 4648) support.
Privacy & Data Handling: Base64 payloads are converted ephemerally and never written to disk or application logs.
HYBRID MODE
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How to Use Base64 Encoder and Decoder
- Enter plain UTF-8 text to encode, or a Base64 string to decode.
- Toggle URL-Safe mode if working with JWTs or URL tokens.
- Execute the conversion and copy the verified output.
About This Utility
Convert text payloads to and from standard Base64 or URL-safe Base64 (using - and _ instead of + and /). Includes strict character validation and UTF-8 integrity verification.
Frequently Asked Questions
Defined in RFC 4648 Section 5, base64url replaces + with - and / with _ and strips trailing = padding so tokens can be placed safely in URLs.