> For the complete documentation index, see [llms.txt](https://docs.sirplugin.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sirplugin.com/getting-started/2.-activating-your-license-key.md).

# 2. Activating your License Key

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**Heads up!** Before activating your license key, make sure you installed Smart Image Resize PRO.
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1\. In your WordPress admin, go to the *WooCommerce menu → Smart Image Resize → Manage License*.

![](/files/BxFOTCr7OwxUZxOBIi5l)

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If you're not using WooCommerce, you can activate your license key under *the Settings menu → Smart Image Resize → Manage License.* 
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2\. Copy and paste the license key you received in your purchase confirmation email, and click the **"Activate license"** button to activate your license key.

![](/files/l06hcNeFycBfeY4oHZHD)

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Didn't receive your purchase confirmation email? [Log in to your account](https://sirplugin.com/myaccount) to access your license key and download link.
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#### Can I change the license key to another domain after I activate it?

Yes, but before you activate your license key on the new domain, make sure you unlink it from the old domain. Here's how:

1. Go to *WooCommerce menu →  Smart Image Resize  →* *Manage License*
2. Click the button "**Deactivate license"** to remove the license key from the old domain
3. Now, you can activate it on the new domain

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Having trouble activating/deactivating your license key? [Log in to your account](https://sirplugin.com/myaccount) to manage your site activations or email <support@sirplugin.com> for support.
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