DNA file formats can vary between different genetic testing services, which is why raw DNA data is not always directly compatible across platforms.
Most major providers such as 23andMe, AncestryDNA, MyHeritage, and FamilyTreeDNA use their own file structures. These differences may include file type (CSV or TSV), column order, genotype representation, and the number of genetic markers included.
For example, 23andMe typically uses a tab-separated format (TSV) with a single genotype column, while AncestryDNA provides a CSV file with separate allele columns. MyHeritage also uses CSV but with a slightly different structure.
Because of these variations, uploading a DNA file from one service to another may not work without conversion.
➡️ Convert DNA file formats online
A DNA converter adjusts file structure, merges or splits genotype fields, and ensures compatibility between platforms.
Understanding DNA file formats helps you reuse your genetic data across different services and get more value from your DNA test.
