This website uses HIBAG  and associated pre-trained models to impute your class I HLA type from your 23andMe raw data file.
The HLA proteins are encoded by the MHC region on chromosome 6. The method used here relies on a machine learning technique which is not as accurate as traditional HLA typing. This website is for entertainment only, please do not use the results for anything serious.
If you don't have a 23andme genome available you can download one here Zheng, X. et al. HIBAG-HLA genotype imputation with attribute bagging. Pharmacogenomics Journal 14, 192-200 (2014).