kms.viktorbarzin.me

Free public KMS · Windows · Office · Project · Visio · No signup, no tracking

Activate Microsoft Volume License products in seconds.

Public KMS host. Point any VL Windows / Office / Project / Visio at it and it activates — no keys to remember, no account, no logs of personal data beyond the activation event itself. Run the one-liner below, or use the GVLK tables further down.

Public KMS host {{ .Site.Params.kmsHost }}:{{ .Site.Params.kmsPort }}
Reachable from any IPv4 internet
Cost free, forever

Quick start

Open PowerShell as Administrator and paste the command for what you want. No key to enter — each one detects your edition, fetches the right key, points it at {{ .Site.Params.kmsHost }}:{{ .Site.Params.kmsPort }}, activates, and prints the result. Safe to re-run (already-licensed installs are left alone).

Activate Windows
iwr -UseBasicParsing https://{{ .Site.Params.siteHost }}{{ .Site.Params.winURL }} | iex
Activate Office
iwr -UseBasicParsing https://{{ .Site.Params.siteHost }}{{ .Site.Params.officeURL }} | iex

Need more? To activate everything you have (Windows + Office + Project + Visio) interactively, run the bootstrap and answer the prompts: iwr -UseBasicParsing https://{{ .Site.Params.siteHost }}{{ .Site.Params.bootstrapURL }} | iex. Prefer to read first? activate-windows.ps1, activate-office.ps1, kms-bootstrap.ps1.

Want to skip the script entirely? Two cmd.exe lines do the same job:

cmd.exe — manual
slmgr /skms {{ .Site.Params.kmsHost }}:{{ .Site.Params.kmsPort }}
slmgr /ato

cscript "C:\Program Files\Microsoft Office\Office16\ospp.vbs" /sethst:{{ .Site.Params.kmsHost }}
cscript "C:\Program Files\Microsoft Office\Office16\ospp.vbs" /act
{{/* helper: build product family groupings */}} {{ $windows := .Site.Data.products.windows }} {{ $servers := .Site.Data.products.windows_server }} {{ $office := .Site.Data.products.office }}

Windows desktop

Per-edition GVLKs. Volume License only — Home and retail SKUs cannot KMS-activate. Click any key to copy.

{{ $order := slice "Windows 11 / 10" "Windows LTSC" }} {{ range $family := $order }} {{ $items := where $windows "family" $family }} {{ if $items }}

{{ $family }}

{{ range $items }} {{ end }}
EditionGVLKNotes
{{ .edition }}{{ if .current }} current{{ end }} {{ .gvlk }} {{ with .notes }}{{ . }}{{ else }}—{{ end }}
{{ end }} {{ end }}

Legacy desktop (Windows 8.1 / 8 / 7 / Vista) is out of support and omitted. Those GVLKs still work against this KMS — look them up in Microsoft's KMS client key list and activate with the same slmgr steps below.

How to use a GVLK on Windows 
:: open cmd.exe as Administrator
slmgr /upk                                       :: remove existing key
slmgr /ipk <PASTE-GVLK-HERE>                     :: install GVLK
slmgr /skms {{ .Site.Params.kmsHost }}:{{ .Site.Params.kmsPort }}     :: point at this server
slmgr /ato                                       :: activate
slmgr /dlv                                       :: verify (look for "LICENSED")

Windows Server

Server SKUs need only 5 unique clients to satisfy the KMS activation count threshold (vs. 25 for desktop).

{{ $serverOrder := slice "Windows Server 2025" "Windows Server 2022" "Windows Server 2019" "Windows Server 2016" }} {{ range $family := $serverOrder }} {{ $items := where $servers "family" $family }} {{ if $items }}

{{ $family }}

{{ range $items }} {{ end }}
EditionGVLKNotes
{{ .edition }}{{ if .current }} current{{ end }} {{ .gvlk }} {{ with .notes }}{{ . }}{{ else }}—{{ end }}
{{ end }} {{ end }}

Server 2012 R2 / 2012 / 2008 R2 / 2008 are end-of-life and omitted. Their GVLKs still activate here — see Microsoft's KMS client key list.

Office · Project · Visio

All listed editions are Volume License. Install via the Office Deployment Tool with the matching Configuration.xml below (use Channel shown in each row), or manually swap a retail key with ospp.vbs /unpkey:<LAST5> + /inpkey:<GVLK> and /act.

{{ $officeOrder := slice "Office LTSC 2024" "Office LTSC 2021" "Office 2019" "Office 2016" }} {{ range $family := $officeOrder }} {{ $items := where $office "family" $family }} {{ if $items }}

{{ $family }}

{{ range $items }} {{ end }}
EditionProduct IDGVLKChannel
{{ .edition }}{{ if .current }} current{{ end }} {{ .product }} {{ .gvlk }} {{ .channel }}
{{ end }} {{ end }}
Sample Configuration.xml — Office Pro Plus 2024 + Project Pro 2024 
<Configuration>
  <Add OfficeClientEdition="64" Channel="PerpetualVL2024">
    <Product ID="ProPlus2024Volume"   PIDKEY="XJ2XN-FW8RK-P4HMP-DKDBV-GCVGB">
      <Language ID="en-us"/>
    </Product>
    <Product ID="ProjectPro2024Volume" PIDKEY="FQQ23-N4YCY-73HQ3-FM9WC-76HF4">
      <Language ID="en-us"/>
    </Product>
  </Add>
  <Updates Enabled="TRUE" Channel="PerpetualVL2024"/>
  <Display Level="None" AcceptEULA="TRUE"/>
  <Property Name="AUTOACTIVATE" Value="1"/>
  <Property Name="FORCEAPPSHUTDOWN" Value="TRUE"/>
</Configuration>
Activation — bare commands 
cd "C:\Program Files\Microsoft Office\Office16"
cscript ospp.vbs /sethst:{{ .Site.Params.kmsHost }}
cscript ospp.vbs /setprt:{{ .Site.Params.kmsPort }}
cscript ospp.vbs /inpkey:<PASTE-GVLK>
cscript ospp.vbs /act
cscript ospp.vbs /dstatus               :: verify --LICENSED--

Downloads

Office Deployment Tool

Single binary that installs every Office VL edition listed above, driven by a Configuration.xml.

{{ .Site.Data.products.downloads.odt.label }} ↗

{{ .Site.Data.products.downloads.odt.notes }}

Windows ISOs

PowerShell scripts

Both scripts are open-source, single-file, no dependencies. Read before running.

FAQ & gotchas

Why won't my retail Office activate?

KMS only grants licenses to Volume License editions. Retail / OEM / Microsoft 365 keys reject KMS responses. Either reinstall as VL via ODT, or swap the key in place: cscript ospp.vbs /unpkey:<LAST5> followed by cscript ospp.vbs /inpkey:<GVLK> and /act.

What about Windows Home?

Home editions cannot be KMS-activated. Either upgrade to Pro/Enterprise/Education (DISM /Set-Edition or in-place reinstall) or use a retail key.

The first activation fails with 0xC004F038

That's the KMS count threshold: 25 unique clients (or 5 servers) must contact the host before desktop clients can activate. The host caches counts for 30 days. The vlmcsd implementation in this server bypasses that — but real Microsoft KMS hosts enforce it. If you ever swap to a hardware host you may need to pre-seed activations.

Office LTSC vs Microsoft 365 — can they coexist?

No. The Click-to-Run installer refuses side-by-side. Run setup.exe /configure Remove.xml with <Remove All="TRUE"/> first, then install the VL edition.

How does auto-discovery work? Do I need it?

No — the Quick Start one-liner pins the host explicitly so auto-discovery is irrelevant for internet visitors. It exists for managed corporate networks: the Software Protection Service queries DNS for _vlmcs._tcp.<primary-dns-suffix>, and if the SRV resolves, Windows connects there on the returned port. If you want it on your own LAN, publish a SRV record pointing at {{ .Site.Params.kmsHost }}:{{ .Site.Params.kmsPort }} (or any vlmcsd you self-host) and set the matching DNS suffix on each client.

Will my activation be logged? What about privacy?

The KMS protocol itself sends your machine's hostname, your client IP (from the TCP socket), and the product ID being activated. The server records the event in a log so the operator can see overall traffic. The PowerShell scripts additionally send a small anonymous diagnostics event (see next question) so the operator can spot and fix script breakage. No personal data beyond what the KMS protocol itself transmits is collected; nothing is shared, sold, or retained beyond the operator's monitoring. If that bothers you, run your own vlmcsd — it's a single binary, the source is on GitHub.

Does the script send anything back to the server?

Yes — a single anonymous, fire-and-forget diagnostics event per run, so the operator can find and fix execution failures. It contains: the script name + version, what ran (Windows / Office / edition-switch / install) and whether it succeeded, the error text on failure, your Windows edition / build / locale, and detected Office products. It does not send your hostname, username, or product keys. It can never block or break activation (3-second timeout, errors swallowed). Opt out entirely by setting $env:KMS_NO_TELEMETRY=1 before running the one-liner.

Is this legal? Can I use it for anything?

KMS activates only Volume License (VL) editions of Microsoft software. VL keys are licensed per-organization by Microsoft; using a VL edition without a real VL agreement violates Microsoft's licensing terms. This server exists for personal lab / learning / unsupported-OS-revival use. If you don't have a VL agreement, evaluate Windows + Office through Microsoft's free trial channels instead. The site operator is not responsible for how visitors use the host.

How long does a KMS license last?

180 days. The client tries to renew every 7 days; one successful renewal resets the 180-day clock. As long as a machine reaches the KMS once a quarter it stays activated indefinitely.

Where can I see the GVLKs Microsoft publishes?

Windows: learn.microsoft.com/.../kms-client-activation-keys.
Office / Project / Visio: learn.microsoft.com/.../gvlks.