Edit chromosome identifiers in VCF files

I have 3 vcf files that I want to merge but one of them has “chr” in the chromosome identifiers and the other two don’t. Is there a way to edit the identifiers so they match?

Hi @numbergirl86
try text replacement tools. Maybe separate header and the data. For data replace values in 1st column. Concatenate header and data after replacement.
Hope this helps.
Kind regards,