Set up Draftmate

One small app, one browser extension, a few minutes once. Draftmate runs in Mozilla Firefox, Google Chrome or Microsoft Edge on a Windows PC (not a Chromebook; a Mac build is in private beta). Pick the path for the sites you draft on.

Free path — Yahoo, Sleeper, ESPN, MyFantasyLeague, Fleaflicker

Nothing to sign up for and nothing to allow. Draftmate needs no key on these five sites.

  1. Install the free app

    Download Draftmate-Setup.exe, run it, and let it launch Draftmate at the end. The app holds your rankings and does the scoring on your own computer; the extension only draws the panel.

    Seeing a blue "Windows protected your PC" box? That is SmartScreen not recognising an unsigned file yet, not a finding against it. Click More info, then Run anyway.

  2. Add the extension

    On Firefox: add Draftmate from Firefox Add-ons — one click, and Firefox keeps it updated. That is the whole step; go on to step 3.

    On Chrome or Edge: already added Draftmate from the Chrome Web Store? Skip this step — never load a second copy. The store listing is on its way; until it is live the installer has already placed the extension on your computer, and you point Chrome at it once:

    • Open Chrome and go to chrome://extensions — using Microsoft Edge instead? Go to edge://extensions; every step below is identical.
    • Turn on Developer mode (toggle in the top-right corner)
    • Click Load unpacked
    • Select the extension folder the installer opened for you, or navigate to:
      C:\Users\[your username]\Draftmate\extension
      (You can also paste %USERPROFILE%\Draftmate\extension into the folder picker's address bar to jump straight there.)
    • Click Select Folder

    It appears in your list as Draftmate Pro — that is the same extension; on these five sites it needs no key. If you add the store version later, remove this one first: run one copy, never both.

  3. Open a draft

    Open a draft room on any of the five sites in Firefox, Chrome or Edge — a mock draft is perfect for the first run. The Draftmate panel appears in the room by itself (top-right by default; drag it anywhere, or pin it to an edge). No key, no permission prompt.

  4. Upload your rankings

    Click Upload in the panel and choose a rankings CSV — any file with a rank and a player name (team and position help it tell players apart). Keep one sheet per scoring format and upload the one that matches the league you are in; Draftmate never converts a PPR sheet into half-PPR ranks.

    That's it. The panel reads the live board and keeps your list updated as picks come in, and it follows the site's own position, team and search filters.

Pro path — FFPC, DraftKings, Underdog

The same app, the extension the installer sets up, and the key from your purchase email. One key covers all three sites — and the five free ones need none.

Watch the whole thing first

Seven minutes, start to finish — download, install, load the extension, activate. If you would rather follow along than read, this is the same walkthrough as the steps below.

  1. Make sure the installer finished

    If you haven't run the installer yet, do that first: download Draftmate-Setup.exe (also linked in your license email), run it, and let it launch Draftmate at the end.

    Seeing a blue "Windows protected your PC" box? That is SmartScreen not recognising an unsigned file yet, not a finding against it. Click More info, then Run anyway.

  2. Add the extension

    On Firefox: add Draftmate from Firefox Add-ons — one click. That listing is the full extension, FFPC, DraftKings and Underdog included, and Firefox keeps it updated. Go on to step 3.

    On Chrome or Edge: this is a one-time step. The installer placed the extension files on your computer; you just need to point Chrome at them.

    Easy path: if you left "Open the Draftmate extension folder" checked on the installer's finish screen, a File Explorer window is already open showing the folder. Just point Chrome at it.

    • Open Chrome and go to chrome://extensions — using Microsoft Edge instead? Go to edge://extensions; every step below is identical.
    • Turn on Developer mode (toggle in the top-right corner)
    • Click Load unpacked
    • Select the extension folder that the installer opened for you, or navigate to:
      C:\Users\[your username]\Draftmate\extension
      (You can also paste %USERPROFILE%\Draftmate\extension into the folder picker's address bar to jump straight there.)
    • Click Select Folder

    Draftmate Pro now appears in your extensions list. (Pin it if you like — click the puzzle-piece icon, then the pin next to Draftmate.)

    Run one extension, never both. Draftmate Pro covers the five free sites too. If you added the free Draftmate from the Chrome Web Store, remove it at chrome://extensions — two copies would each try to draw a panel on the same page. On Firefox the add-on from Firefox Add-ons is the only copy you need.

  3. Open a draft and activate

    • Open a draft room in Firefox, Chrome or Edge — FFPC, DraftKings or Underdog. A slow draft is perfect for your first run.
    • On FFPC in Chrome or Edge, the browser asks once to allow access to your local network — click Allow. That's what lets the panel talk to the Draftmate app on your computer; miss it and the panel runs in demo mode with placeholder players. DraftKings and Underdog never ask — they reach Draftmate a different way — and Firefox never asks on any site, so there is nothing to allow there.
    • The Draftmate panel appears (top-right by default — you can drag it anywhere, or pin it to an edge) and asks for your license key.
    • Paste the key from your license email — it looks like DM-XXXX-XXXX-XXXX. One key covers all three sites: activate once, anywhere, and the other panels pick it up.
    • When prompted, upload a rankings CSV for the format you're drafting. Draftmate keeps a separate set per format — FFPC has Bestball, Superflex and Gorilla / Main Event / Classic; Underdog has Best Ball, Superflex, Weekly Winners, Eliminator and Full PPR; DraftKings is best ball. You can add more later.

    That's it. The panel reads the live board and keeps your recommendations updated as picks come in.

  4. Pull in your teams

    Draftmate builds your portfolio — cross-team exposure, stacks, combos — from the teams you've already drafted. How they get in differs by site, because each one exposes its contests differently:

    • FFPC — automatic. Nothing to do. Your teams are captured as you draft and refreshed in the background.
    • DraftKings — visit My Contests once. Draftmate captures your teams from that page on its own; the "Grab all my drafts" button at the bottom-left does it on demand.
    • Underdog — use the bottom-left button. "Grab all my UD teams" works from the active lobby, from inside an active draft, or from the completed drafts page — whichever you happen to be on.

    You only need to do this once per site; after that Draftmate keeps up as you draft. Re-run the grab any time you want to be certain it has caught everything. The Auto-capture teams switch in the toolbar popup turns the background capture off for the off-season.

    Drafting somewhere else? Your portfolio lives on this computer, not on our servers — which is what keeps your draft data off the internet, but it also means picks made in the FFPC, DraftKings or Underdog mobile apps, or on a second machine, aren't here until you pull them in. Run the sync above on each computer you draft from, and after any run of drafting on your phone. If an exposure number looks lower than you expect, a sync is the first thing to try.

Now watch it in a real draft

Set up and wondering what to actually do with it? Each of these walks through Draftmate in a live draft room on that site — recommendations, exposure, stacks and championship-week weighting.

Troubleshooting

The panel says this Draftmate app does not serve Sleeper (or Yahoo, ESPN, MyFantasyLeague, Fleaflicker)

The app on your computer is an older build from before those sites were added. Download the current Draftmate-Setup.exe and run it — the update keeps your rankings, key and teams — then reload the draft tab. On Chrome or Edge also click the reload arrow on Draftmate at chrome://extensions first, because the installer refreshed the extension folder too; on Firefox the add-on updates on its own.

The panel says it can't connect, or that Draftmate is offline

Draftmate has two parts: the browser extension and a small background app that the installer set up. If the panel can't connect, the app isn't running.

Open the Draftmate shortcut from your Start menu or desktop to start it. A console window flashes briefly, then it runs in the background on your machine. Refresh your draft tab and the panel should connect.

Two panels on one page, or the panel says "Draftmate Pro" and I only wanted the free one

You have two copies of the extension loaded — the one from the Chrome Web Store and the one the installer placed. Keep one. Draftmate Pro is the installer's copy and works on the five free sites with no key, so either is fine on its own; remove the other at chrome://extensions.

The panel shows demo data or placeholder players (FFPC)

On FFPC, this almost always means your browser blocked Draftmate's local connection — even while the app is running fine. Chrome and Edge require permission for a web page to reach an app on your own computer. Click the site-info icon (the tune or lock icon) at the left of the address bar and turn on "Apps on device" — that's newer Chrome's name for it; older Chrome/Edge label it "Local network access" or "Insecure private network." Then hard-refresh the draft tab (Ctrl+Shift+R) and it switches from demo to your live board.

Just updated your browser? A Chrome or Edge update can silently switch this permission back off — so if Draftmate was working and suddenly drops to demo players, re-check that "Apps on device" toggle first. Quick way to prove the app itself is healthy: open http://127.0.0.1:8765/health — if it shows {"ok": true}, the app is fine and this permission is the only thing standing in the way.

On Firefox, and on every other site in any browser, this is not the cause — there's no permission to grant, so demo data means the app isn't running (the entry above). If FFPC works and the others sit on demo or won't connect, restart Draftmate from the Start menu, reload the extension at chrome://extensions, then hard-refresh the draft tab. Still stuck? Email support@getdraftmate.com and say which sites work.

I don't see the "Load unpacked" button

You need Developer mode turned on first — it's the toggle in the top-right of chrome://extensions. The "Load unpacked" button only appears once it's on.

On Firefox you never need it — "Load unpacked" is a Chrome and Edge step. Add Draftmate from Firefox Add-ons instead.

The Draftmate extension folder doesn't exist where the guide says it should

That means the installer didn't finish. Re-run Draftmate-Setup.exe and let it complete all the way through. If you chose a custom install location during setup, look for the extension folder inside wherever you installed Draftmate.

My license key won't activate (Pro)

Double-check you copied the whole key, including the DM- prefix and all three dash-separated groups. Keys are case-insensitive. If it still won't take, email support@getdraftmate.com with the key and we'll sort it out fast.

Does this work on a Mac, a Chromebook, or the mobile apps?

Not yet for Mac. Today Draftmate is a browser extension paired with a Windows background app, so it needs Mozilla Firefox, Google Chrome or Microsoft Edge on a Windows 10 or 11 laptop or desktop. It doesn't run on a Chromebook/ChromeOS, Safari, or any site's mobile app — and the Chrome browser on a Chromebook isn't enough, since ChromeOS can't run the Windows app. A Mac build is in private beta (not yet publicly available). Draft from Firefox, Chrome or Edge on a Windows computer for any draft where you want Draftmate.

Still stuck? Email support@getdraftmate.com — we answer fast, especially during draft season.