Passing base64 encoded strings in URL

Question

Is it safe to pass raw base64 encoded strings via GET parameters?

Answer 1

For url safe encode, like base64.urlsafe_b64encode(...) in Python the code below, works to me for 100%

function base64UrlSafeEncode(string $input)
{
   return str_replace(['+', '/'], ['-', '_'], base64_encode($input));
}