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How to install FreeHarmony on Windows

FreeHarmony does what FaceHarmony does, and FaceHarmony costs $107.88/year. This guide gets you the free one.

What you end up with

FreeHarmony running in your browser, on your own computer. It is free, and it stays free — there is no account, no trial and no subscription at the end of this.

Time
About 10 minutes
Steps
12
Cost
Free

Before you start

These are one-time installs. If you have used PowerShell before, you may have them already — the first step checks.

  1. Install Git

    Run the installer, then reopen PowerShell.

    Open installer

    You know this worked when: Git responds with a version number

  2. Install Node LTS

    Run the LTS installer, then reopen PowerShell.

    Open download

    You know this worked when: Node responds with a version number

Install FreeHarmony

  1. Open PowerShell

    Keep it open beside this page.

    You know this worked when: PowerShell is open

  2. Check Git and Node

    Use PowerShell. Node 20.9 or newer is required.

    Type this into PowerShell, then press Enter.

    git --version
node --version

    You know this worked when: Git and Node respond with version numbers

  3. Install pnpm

    FreeHarmony is a pnpm workspace.

    Type this into PowerShell, then press Enter.

    npm.cmd install -g pnpm

    You know this worked when: pnpm responds with a version number

  4. Copy FreeHarmony to this PC

    Type this into PowerShell, then press Enter.

    cd ~
if [ ! -d freeharmony/.git ]; then
git clone https://github.com/Blueturboguy07/freeharmony.git
fi

    You know this worked when: The freeharmony folder exists

  5. Open the FreeHarmony folder

    Type this into PowerShell, then press Enter.

    cd freeharmony

    You know this worked when: Your terminal prompt is inside the freeharmony folder

  6. Use the reviewed version

    Type this into PowerShell, then press Enter.

    git checkout 420374370549f7e90603f030820128bfc9f62fc0

    You know this worked when: Git reports the reviewed commit

  7. Install dependencies

    Type this into PowerShell, then press Enter.

    pnpm.cmd install --frozen-lockfile

    You know this worked when: The install finishes without an error

  8. Run FreeHarmony

    Keep PowerShell open.

    Type this into PowerShell, then press Enter.

    pnpm.cmd dev

    You know this worked when: localhost:3000 responds

  9. Open FreeHarmony

    If Next.js printed a different port, open that one instead.

    Open localhost:3000

    You know this worked when: FreeHarmony loads in the browser

  10. Try one scan

    Allow the camera or upload a photo — a second later you get your Harmony score and metrics.

    You know this worked when: A Harmony result is displayed

If something goes wrong

Nothing here can damage your computer, and every step can be run again safely. If a command fails, the usual cause is the step before it not having finished.

Still stuck? Tell us what happened and we will fix the guide. Include the step number and we can usually reproduce it.

Have a different setup?