Check for VCF-format input example. Check for CRAVAT-format input example. Enter variants below: Two input formats are supported: CRAVAT format and VCF format. VCF format See VCF specification for details. CRAVAT format See input format help for details. Genomic-coordinate input format UID, chromosome, position (1-based), strand, reference base(s), alternate base(s), and (optional) sample ID, separated by a space or tab. UID should not contain commas. For indels, use the following format. "-" means no bas