text: user8875: The 23andMe version 3 data (v3) is now quite 'old' and new data is being collected on the updated v5 Illumina SNP-Chip (details here).
  Is there an online service for imputing 23andMe v3 files to v4 and v5?
  Seems this would be quite handy!
  
  user3694: The different V numbers are just different number of SNPs as far as I'm aware. So there's not going to be a service which just imputes the variants to make e.g. V3 into V5.
  The Michigan Imputation Server uses the Haplotype Reference Consortium to impute genotypes and allows input in 23andme format. You'll end up with many more SNPs than in the V5 chip, but filtering out the other ones should be easy.
  
original_text: 8875: <p>The 23andMe version 3 data (v3) is now quite 'old' and new data is being collected on the updated v5 Illumina SNP-Chip (<a href="https://www.mygenefood.com/blog/understanding-23andme-chip-versions-why-v3-v4-v5-and-others-can-differ/#how_do_the_various_chips_differ" rel="nofollow noreferrer">details here</a>).</p>
  <p>Is there an online service for imputing 23andMe v3 files to v4 and v5?</p>
  <p>Seems this would be quite handy!</p>
   3694: <p>The different V numbers are just different number of SNPs as far as I'm aware. So there's not going to be a service which just imputes the variants to make e.g. V3 into V5.</p>
  <p>The <a href="https://imputationserver.sph.umich.edu/index.html#!" rel="nofollow noreferrer">Michigan Imputation Server</a> uses the Haplotype Reference Consortium to impute genotypes and allows input in 23andme format. You'll end up with many more SNPs than in the V5 chip, but filtering out the other ones should be easy.</p>
  