Single HTML file • Works offline

Your family story, beautifully preserved

Build and explore your family tree in your browser. No servers, no accounts, no tracking. Just you and your history.

Download free GitHub
~380kb Total size
0 Dependencies
100% Private
You
Interactive family tree visualization
Why Strom

Everything you need,
nothing you don't

One file. That's it.

A single HTML file under 400kb. Download it, open it in any browser, done. No installation, no setup, no accounts.

Your data stays yours

Everything runs locally in your browser. No servers, no cloud, no tracking. Optional AES-256 encryption for exports.

Works everywhere

No internet required. Use it on a plane, in a cabin, or anywhere else. Your family history travels with you.

GEDCOM compatible

Import from Ancestry, FamilySearch, Gramps, and more. Export to share with anyone using the industry standard.

Just the essentials

Names, dates, places, relationships—nothing more. No photo uploads, no bloated features. A clean, text-focused approach to genealogy.

Free & open source

Free for personal use under MPL 2.0. Inspect the code, suggest improvements, or just use it with confidence.

Getting started

Three steps to your family tree

1

Download

Get the single HTML file from GitHub. It's under 400kb—smaller than most images.

2

Open

Double-click the file. It opens in Chrome, Firefox, Safari, Edge—any modern browser.

3

Build

Add family members, connect relationships, and watch your tree come to life. It's that simple.

Start preserving your family history

Download Strom and begin building your family tree today. It's free for personal use.

Download latest release View source on GitHub

Works on Windows, macOS, and Linux. Requires a modern web browser.