Base64 Encoder / Decoder vs JWT Decoder
encoding
Base64 Encoder / Decoder
Encode text or data to Base64, or decode Base64 back to plain text.
Encode any UTF-8 string to Base64 or decode a Base64 string back to plain text. Supports standard Base64 (RFC 4648) and URL-safe Base64 (uses - and _ instead of + and /). Detects and reports malformed input.
Example input:
{
"input": "Hello, World!",
"mode": "encode",
"charset": "standard"
}encoding
JWT Decoder
Decode and verify JSON Web Tokens — header, payload, claims, and signature.
Paste a JSON Web Token to instantly decode its header and payload. Optionally supply a secret or public key to verify the signature.
Example input:
{
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}| Feature | Base64 Encoder / Decoder | JWT Decoder |
|---|---|---|
| Category | encoding | encoding |
| Inputs | input, mode, charset | token, secret, algorithm |
| Outputs | output, valid, encoding, byte_length, error | header, payload, signature, valid_structure, verified |