{"name":"DNA Layer raw DNA file format reference","version":"2026-08-26","url":"https://www.dnalayer.ai/research/raw-dna-format-reference","methodology":{"scope":"Structures recognized by DNA Layer's public browser checker. This is a compatibility reference, not a complete provider specification or clinical validation.","reviewedOn":"2026-08-26","rules":["Describe only structures the current checker recognizes.","Identify a provider only when its name is present in the file header.","Report a genome build only when the file declares one.","Do not infer chip version, clinical completeness, or provider from row count.","Keep synthetic examples free of real or customer genetic data."]},"formats":[{"id":"23andme","provider":"23andMe","headerMarkers":["23andme"],"columns":["rsid","chromosome","position","genotype"],"columnCount":4,"delimiter":"Tab or whitespace","acceptedContainers":["ZIP","TXT"],"checkerStatus":"supported","note":"The genotype is represented in one column. The checker reads the original ZIP directly.","sources":["https://int.customercare.23andme.com/hc/en-us/articles/215983947-Raw-Genotype-Data-Technical-Details","https://eu.customercare.23andme.com/hc/en-us/articles/204664690-Accessing-Your-Raw-Genetic-Data"]},{"id":"ancestrydna","provider":"AncestryDNA","headerMarkers":["ancestrydna","ancestry dna"],"columns":["rsid","chromosome","position","allele1","allele2"],"columnCount":5,"delimiter":"Tab or whitespace","acceptedContainers":["ZIP","TXT"],"checkerStatus":"supported","note":"The two alleles are represented in separate columns. The checker reads the original ZIP directly.","sources":["https://www.ancestry.com/c/legal/faq"]},{"id":"myheritage","provider":"MyHeritage","headerMarkers":["myheritage"],"columns":["RSID","CHROMOSOME","POSITION","RESULT"],"columnCount":4,"delimiter":"Comma or tab","acceptedContainers":["ZIP","CSV","TXT"],"checkerStatus":"supported","note":"The standard third-party export is distinct from MyHeritage's separately planned CRAM download.","sources":["https://www.myheritage.com/help/en/articles/12852457-what-does-the-whole-genome-sequencing-wgs-upgrade-mean-for-my-dna-results"]},{"id":"tellmegen","provider":"TellMeGen","headerMarkers":["tellmegen"],"columns":["rsid","chromosome","position","genotype"],"columnCount":4,"delimiter":"Tab or whitespace","acceptedContainers":["ZIP","TXT"],"checkerStatus":"supported-newer","note":"Recognition is available, but DNA Layer's TellMeGen upload support is newer and less thoroughly tested.","sources":["https://www.dnalayer.ai/dna-report/tellmegen"]}],"limitations":["Provider exports and interfaces can change after the review date.","A readable row structure does not prove that every genotype is correct or that the file covers a particular health finding.","Generic four- or five-column tables remain provider-unverified unless the header names the source.","The checker does not support VCF, CRAM, BAM, PDFs, screenshots, or family-tree GEDCOM files."]}