--- title: "Explore the full Y-DNA and mtDNA haplotrees, free" description: "Two new free tools: browse the complete paternal tree — over 109,000 named branches — and the full maternal tree, with defining variants, tester counts by country and search by haplogroup or SNP. No account needed." canonical: https://www.ancestrify.io/blog/explore-full-haplotree-free date: 2026-08-27 author: "Ancestrify" --- # Explore the full Y-DNA and mtDNA haplotrees, free Knowing your haplogroup is one thing. Seeing where it sits — what branches above it, what descends from it, which mutations define it and where its lineages turn up in the world — is another, and until now it meant piecing it together across half a dozen sites. Two new free tools in the Ancestrify Lab put the whole picture in one place: the [Y-DNA haplotree](/lab/y-haplotree) and the [mtDNA haplotree](/lab/mt-haplotree). Both run in your browser, and neither needs an account. ## What is in them The **paternal tree** holds over 109,000 named branches, from the root down to twigs defined by mutations only a few centuries old. The **maternal tree** holds every named branch of the mitochondrial phylogeny. For any branch you land on, you get: - **The defining variants** — the specific SNPs (or mitochondrial mutations) that put a lineage on that branch, with their positions and ancestral/derived states. - **Tester counts** — how many tested lineages sit on the branch, and how they distribute across countries. - **The surrounding structure** — the branch's parent chain and the named sub-branches beneath it, so you can walk up toward the root or down into the detail. You can jump straight to a haplogroup by name, search by SNP name, or filter the whole tree by country to see which lineages are common where. ## Every section has its own page The trees are big enough that a single URL would be a poor way to reference them, so each root section has a page of its own: [Y haplogroup R](/lab/y-haplotree/r) — the largest section, home to both R1b and R1a — through to [Y haplogroup T](/lab/y-haplotree/t), and every letter of the maternal tree from [A](/lab/mt-haplotree/a) to [Z](/lab/mt-haplotree/z). The branches people search for most have dedicated guide pages with their origin, age and distribution written out in full: **Paternal** — [R-M269](/lab/y-haplotree/r/r-m269) (R1b, Western Europe's dominant paternal line), [R-M417](/lab/y-haplotree/r/r-m417) (R1a), [I-M253](/lab/y-haplotree/i/i-m253) (I1, the Nordic lineage), [I-P37](/lab/y-haplotree/i/i-p37) (I2a, the Balkan expansion), [E-V13](/lab/y-haplotree/e/e-v13), [J-M172](/lab/y-haplotree/j/j-m172) (J2), [G-M201](/lab/y-haplotree/g/g-m201) (the first farmers' lineage) and more. **Maternal** — [H](/lab/mt-haplotree/h/h) and [H1](/lab/mt-haplotree/h/h1), [U5](/lab/mt-haplotree/u/u5) (Europe's hunter-gatherer maternal line), [K](/lab/mt-haplotree/k/k), [J](/lab/mt-haplotree/j/j), [T2](/lab/mt-haplotree/t/t2), [V](/lab/mt-haplotree/v/v), [X](/lab/mt-haplotree/x/x) and [W](/lab/mt-haplotree/w/w). ## Where your haplogroup runs strongest Both free finders — the [Y-DNA Clade Finder](/lab/clade-finder) and the [mtDNA Haplogroup Finder](/lab/mt-finder) — now show a prevalence view alongside your result: the countries where tested lineages on your branch are most concentrated, measured as a share of that country's testers rather than as a raw count. The distinction matters. Raw counts would crown the United States and the United Kingdom for almost every lineage, simply because that is where most testing happens. Prevalence asks a better question: of the people tested in this country, what fraction sit on this branch? Read it as the geography of *testers*, not of ancestors. Testing rates differ enormously between countries, and a lineage's modern spread reflects thousands of years of movement since it formed. ## Don't know your haplogroup yet? Both finders read it from a raw DNA export you already have, for free: - [Y-DNA Clade Finder](/lab/clade-finder) — your paternal haplogroup. See [the full walkthrough](/blog/how-to-find-y-dna-haplogroup). - [mtDNA Haplogroup Finder](/lab/mt-finder) — your maternal haplogroup, which everyone carries. See [the maternal walkthrough](/blog/how-to-find-mtdna-haplogroup). ## One thing a haplogroup is not Worth repeating, because the trees make it easy to forget: a haplogroup traces **one line of descent**. Your paternal haplogroup follows your father's father's father's line; your maternal one follows your mother's mother's mother's. Go back ten generations and you have up to 1,024 ancestors — each of these threads follows exactly one of them. It is a deep-time lineage marker, not an ethnicity and not an ancestry percentage. For a whole-genome answer to "where does my ancestry come from", that is [qpAdm](/qpadm) or [Global25](/g25) — different methods answering a different question. ## Frequently asked questions ### Do I need an account to browse the trees? No. Both haplotree browsers are free and open to everyone, with no registration. The two *finders* that read your own raw file need a free, email-verified account, because that computation runs on our servers. ### How current is the tree data? The trees are re-ingested as complete new revisions and swapped in atomically, so what you browse is always one consistent published version rather than a half-updated mixture. ### What do the tester counts mean? They count tested lineages placed on that branch **or any of its sub-branches** and reporting an origin — the same cumulative figure the public registry shows for a branch. Each branch also carries its "this branch only" count, the testers whose lineage ends exactly there. Both describe the tested world — heavily weighted toward countries where DNA testing is popular — not ancient population frequencies. ### Can I link to a specific branch? Yes. Each root section has its own URL, and the most-searched branches have their own guide pages. Within the browser, selecting a branch updates the address so you can share exactly what you are looking at.