Base64
Encode and decode Base64 - standard, URL-safe, and MIME variants.
Examples
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Hello, World!
{"user":"admin","role":"superuser"}
Examples
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SGVsbG8sIFdvcmxkIQ==
eyJ1c2VyIjoiYWRtaW4iLCJyb2xlIjoic3VwZXJ1c2VyIn0=
How it works
Base64 encodes binary data as ASCII text using 64 printable characters (A–Z, a–z, 0–9, +, /). Each 3 bytes become 4 characters. Padding (=) is added when input length is not a multiple of 3.
URL-safe variant (RFC 4648 §5) replaces +→- and /→_, making it safe in URLs and JWT headers. MIME wraps lines at 76 chars per RFC 2045.
Reference: RFC 4648
Note: Base64 is encoding, not encryption. It provides no confidentiality - anyone can decode it instantly.
Send output to…
Tool piping coming in a future phase. Copy the output and paste it into any other tool.