In case anybody is nervous about this, the JSON RFC declares UTF-8 to be the default encoding, and points out a simple rule for reliably detecting the Unicode e

In case anybody is nervous about this, the JSON RFC declares UTF-8 to be the default encoding, and points out a simple rule for reliably detecting the Unicode encoding (and endianness) of any JSON text encoded with UTF-8, UTF-16, or UTF-32. You can stick any Unicode characters in a JSON document, unescaped, with confidence that any halfway decent parser will decode it properly.