Squizz is a sequence format file checker with some conversion capabilities.

Squizz can detect the most common sequence and alignment formats :
  EMBL, FASTA, GCG, GDE, GENBANK, IG, NBRF, PIR (codata), RAW, SWISSPROT
  CLUSTAL, FASTA, MSF, NEXUS, PHYLIP (interleaved and sequential).

Online forms for squizz checker and squizz converter.