python-chardet

Character encoding auto-detection in Python 2 and 3. As smart as your browser. Open source.

Detects:

ASCII, UTF-8, UTF-16 (2 variants), UTF-32 (4 variants)
Big5, GB2312, EUC-TW, HZ-GB-2312, ISO-2022-CN (Traditional and Simplified Chinese)
EUC-JP, SHIFT_JIS, ISO-2022-JP (Japanese)
EUC-KR, ISO-2022-KR (Korean)
KOI8-R, MacCyrillic, IBM855, IBM866, ISO-8859-5, windows-1251 (Cyrillic)
ISO-8859-2, windows-1250 (Hungarian)
ISO-8859-5, windows-1251 (Bulgarian)
windows-1252 (English)
ISO-8859-7, windows-1253 (Greek)
ISO-8859-8, windows-1255 (Visual and Logical Hebrew)
TIS-620 (Thai)