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Now offering both SFD (instant) and SFD2 (manual) unlock tokens
sfdcode
Windows app

Unlock SFD from your workshop PC.

Sign in, paste the offline challenge from your scan tool, get the unlock code, copy it back. No browser needed for every job — and the app never talks to the car.

PreviewComing soon — still in final testing

Windows 10 / 11 · 64-bit

About 58 MB download

Price

  • Free with any sfdcode account. Sign in and use the credits you already bought. Buy unlock credits
  • About 58 MB to download. Optional — you can still unlock in the browser without installing.
  • Needs Windows 10 or 11 (64-bit). Older or 32-bit PCs are not supported.
  • 1 credit per successful SFD unlock — same wallet as the website. SFD2 is website-only.

Prices exclude VAT unless shown at checkout.

Almost ready. Want a message when download opens? Write to support@sfdcode.com.

Simple idea

Get the unlock code on the PC — paste it in your scan tool.

This is not a diagnostic program. It asks sfdcode for the unlock code, shows it with copy/QR, and remembers recent jobs so you can find a code again quickly.

  • SFD only

    Paste the offline challenge — unlock code comes back in seconds and uses 1 credit.

  • No SFD2

    SFD2 is not in this app. Order SFD2 on the website instead.

  • Job history

    Recent unlocks stay on the PC with copy and QR. Nothing is written to the car from here.

How it looks

Three steps — sign in, paste challenge, copy code.

Quick look at the screens. The app does not connect to the vehicle.

Preview — small layout changes may still land before release.

Step 1

Sign in

Use your sfdcode email and password. Your credit balance appears after login.

sfdcode Desktop
Your scan toolVCDS HEX-V2
Link typePassthru (USB diagnostic)
Chassis no.WAUZZZ8V4MA000123
VehicleAudi A3 (8V) · 2022

Modules found

  • 0x01EngineSFD
  • 0x17DashboardSFD
  • 0x19GatewaySFD2
  • 0x5FInfotainmentSFD2

Step 2

Paste the challenge

Copy the offline challenge from your scan tool into the app — or scan a QR photo.

sfdcode Desktop
SFD — instantSFD2 — waits for team
Target module17 — Instrument cluster

Request string from diagnostic tool

A1F4 9CB2 DD30 7E18 4A2C 5F90 11B6 CC42 …
Unlock replyReady
8C42 1E9B 7AD0 22F1 65E8 4A33 …

Step 3

Copy the unlock code

Copy or scan the QR, then paste the code into your diagnostic software yourself.

sfdcode Desktop
14:21:04Tool → requesting security handshake
14:21:04Car → sent challenge digits
14:21:05Tool → uploading unlock reply
14:21:05Car → handshake accepted
14:21:06Security unlocked · module responds OK
Total time1.7 s
Errors0
Backup savedSaved
Can undoYes
Module unlockedChecked
What you get

Built for everyday workshop use

Same credits as the website

Log in with your sfdcode account. Each successful unlock uses 1 credit — identical to the member panel.

Challenge in, unlock code out

Paste the offline challenge (or scan a QR), press Calculate, copy the result. No jumping between browser tabs.

Works with your existing tools

The app does not replace VCDS, ODIS or OBDeleven. You still unlock the car in your usual software.

Recent jobs on the PC

Last unlocks stay available with copy and QR if you need the code again.

Needs internet + login

You must be online and signed in with credits on your account.

SFD2 on the website

This app is for SFD only. Order SFD2 from sfdcode.com.

Before you install

What your PC needs

Windows
Windows 10 or Windows 11, 64-bit. Home may not work on every PC — Pro/Enterprise is the safe choice.
PC
Normal Intel or AMD laptop/desktop. Not for phones or old 32-bit machines.
Space
A few hundred MB free is enough for the app and the Microsoft helpers.
Internet
Needed while you unlock. Normal web access is enough — no special firewall setup.
Account
A sfdcode login with credits. No credits = no unlock.
Scan tool
Keep your usual diagnostic software for reading the challenge and writing the unlock code.

First launch helpers (free from Microsoft)

If the app asks to install something on first open, use the links below. One-time setup — then the app starts normally.

Get the unlock code on the PC — paste it in your scan tool.

Coming soon — still in final testing · support@sfdcode.com