base64

Validates that a field contains a valid Base64 encoded string.

Options

Option	Type	Default	Description
message	string	locale default	Custom error message

Playground

Valid values

Value	Notes
"SGVsbG8="	"Hello" in Base64
"dGVzdA=="	"test" in Base64

Invalid values

Value	Reason
"Hello!"	Contains ! which is not a Base64 character
"SGVsbG8"	Missing required padding (=)

Notes

• Empty string ("") always returns valid: true. Combine with notEmpty to require a value.