Recode UTF-8 and Base64
The Base64 encoder and decoder moves text into a transport-safe form and back. You will use it for attachments, data URIs, and headers that carry binary payloads as text. Encoding and decoding stay on the client.
Source string
The left panel holds plain text or an existing Base64 string. Toggle direction when you need decode instead of encode.
Expect roughly thirty percent growth after encoding—that is normal for binary-safe text protocols.
Recoded output
The right panel shows the result ready for curl, Postman, or href attributes. Invalid symbols trigger a clear error.
No server round trip means tokens in the payload stay in your browser.