Base64 string encoder / decoder
Encode and decode text to and from Base64, with URL-safe support.
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About the base64 string encoder / decoder
Encodes text to Base64 and decodes it back, with a switch for the URL-safe alphabet that replaces plus and slash with hyphen and underscore. Text is treated as UTF-8, so accented characters and emoji survive the round trip intact.
Frequently asked questions
Is Base64 a form of encryption?
No. It is an encoding with no key and no secret. Anyone can decode it instantly. Its job is to move binary data safely through channels that only accept text.
When do I need the URL-safe variant?
Whenever the value goes in a URL path, query string or JWT. Standard Base64 uses plus and slash, which have their own meaning in URLs and get mangled or re-encoded in transit.