Runs entirely in your browser, no account

Clinical pedigrees, drawn to the standard.

A local-first pedigree tool for geneticists and genetic counsellors. Turn a family history into a standards-compliant chart, then hand it straight into the record.

Open the canvas See the notation

No account, no upload. Your work autosaves to this browser and never leaves it.

Bennett / NSGC 2022 PDF · PNG · SVG · .ped
smith-family.pedigree autosaved
I II III P proband — index case MZ twins
why not just draw it?

The tools you already have don't speak pedigree.

By hand, a family history drifts out of standard. General diagram tools don't know a consanguineous union from a partnership, or a monozygotic fork from a sibship line. Pedigree Canvas does, so your chart is defensible against the source record.

By hand · a generic canvas
  • Symbols and lines drawn freehand, inconsistent between clinicians.
  • No idea what a proband arrow, quarter-fill or MZ twin bar means.
  • No .ped export for downstream tools.
  • Redraw the whole family every time someone is added.
Pedigree Canvas
  • Every symbol, fill and line follows Bennett/NSGC nomenclature.
  • Partnerships, consanguinity, twins and adoption are first-class.
  • One click to PDF, PNG, SVG, JSON or .ped.
  • Auto-layout keeps generations aligned as the family grows.
the notation, built in

Standards aren't a setting. They're the point.

Colour is never the only channel. Condition shading always carries a pattern or a label, so a colour-blind reader loses nothing. Shape encodes gender identity and fill encodes affected status, all to the 2022 NSGC revision.

Modelled on Bennett RL et al., J Genet Couns (1995 · 2008 · 2022, PMID 36106433).

Man · unaffectedSquare, open fill
Woman · unaffectedCircle, open fill
Non-binary / unknownDiamond
AffectedSolid fill
Quarter shadingMulti-condition, colour + pattern
Confirmed carrierCentral dot
DeceasedDiagonal slash
ConsanguinityDouble union line
everything a pedigree needs

Built for the family history in front of you.

The chrome recedes and the pedigree fills the canvas. Controls appear where you need them: a radial menu on the symbol, a properties panel on selection. They get out of the way when you don't.

Standardised symbols

Square, circle, diamond and triangle by gender identity (NSGC 2022), with sex-assigned-at-birth annotations, the deceased slash, and the proband arrow.

Real relationships

Partnerships, consanguinity, separation, MZ/DZ twins, adoption and sibship lines, modelled as first-class entities rather than strokes you draw.

Conditions, shading & results

Quarter-shade up to four conditions with a configurable, colour-blind-safe key: colour always pairs with a pattern. Record genetic test results (positive, negative, VUS or pending) against each individual.

Fast under pressure

Auto-layout keeps generations aligned and lines uncrossed as the family grows. A command palette, keyboard shortcuts, undo/redo and autosave keep you moving, because you're thinking about the family, not the tool.

⌘K to do anything
get it out cleanly

The pedigree is a clinical document. Export it like one.

Push the chart straight into a patient record, a referral, a teaching slide, or downstream software. Exports are pure ink on paper: no UI chrome, no drop shadows.

PDF A4 with header PNG clean raster SVG vector, model-driven .ped interop JSON full fidelity

Local-first, and private by default.

Everything runs client-side and autosaves to your browser. No account, no server, no family history leaving the machine, so you can trust the data never went anywhere it shouldn't. Export when you want a permanent copy.

Draw your next pedigree to the standard.

Open the canvas and start with a single symbol. It's free, and it's already saving to your browser.

Open the canvas View the source