Base64 decode
What this is
Decoders should accept whitespace, missing = padding, and both +/ and -_ alphabets. JWT payloads are base64url without padding — that is why this tool shares an alphabet with the JWT decoder.
Open the encoder — UTF-8 and base64url, no upload.
FAQ
- Garbage after decode?
- The bytes may not be UTF-8 (images, gzip). Check the hex dump. For files, use a data URI instead of a text box.