Base64 Decoder
This value is never sent to a server. Everything runs locally in your browser.
Paste a Base64-encoded string to decode it instantly. Multi-byte UTF-8 characters are restored without corruption.
What is this?
Base64 is an encoding, not encryption — it represents arbitrary binary data using only 64 text characters (A-Z, a-z, 0-9, +, /) so it can travel safely through text-based protocols like JSON, XML, or email. Anyone can decode it, so it's not meant to hide secrets. You'll commonly see it in each segment of a JWT, in embedded images/attachments, and in Basic auth headers.