--- layout: default-layout needAutoGenerateSidebar: true noTitleIndex: true title: Dynamic Web TWAIN SDK License keywords: Dynamic Web TWAIN, Documentation, License breadcrumbText: License description: Dynamic Web TWAIN SDK Documentation License Page --- # Using License Keys Dynamic Web TWAIN (DWT) requires a valid license key to function. License keys authorize the use of DWT, as well as any configured add-on modules. ## Use Trial Licenses You can request a trial license of Dynamic Web TWAIN through our customer portal, and we will email you your trial license key. You can also contact our [support team](https://www.dynamsoft.com/company/contact/) for new licenses and/or trial license extensions. ### Configure Trial License Keys License keys are configured in the [`Dynamsoft.DWT.ProductKey`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#productkey) property. (**Note**: prior to version 17.0, this property was `Dynamsoft.WebTwainEnv.ProductKey`). The configuration differs depending on how a project loads DWT resource files (see [loading library resources](/_articles/general-usage/resource-loading.md) for more details). Trial key strings typically have the `t0076` prefix.

- [Official SDK](#trial-keys-with-sdk) - [Package Managers](#trial-keys-with-package-managers)

1. Locate the `dynamsoft.webtwain.config.js` file (or search for `ProductKey`). 2. Assign the license key string to [`Dynamsoft.DWT.ProductKey`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#productkey): ```javascript Dynamsoft.DWT.ProductKey = 't0076******'; // Use an offline trial key ``` 3. Load (or reload, if replacing an existing key) the web application and see that it starts scanning.

When using package managers such as `npm`, be sure to check out our web framework samples. Roughly speaking, it involves setting `Dynamsoft.DWT.ProductKey` before calling either [`Dynamsoft.DWT.Load()`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#load) or [`Dynamsoft.DWT.CreateDWTObjectEx()`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#createdwtobjectex): - [Use Web TWAIN in Angular](/_articles/indepth/development/angular.md) - [Use Web TWAIN in React](/_articles/indepth/development/react.md) - [Use Web TWAIN in Vue](/_articles/indepth/development/vue.md)

## Using Full Licenses Contact our [sales team](https://www.dynamsoft.com/store/dynamic-web-twain/) to purchase full licenses for Dynamic Web TWAIN. Use our customer portal to manage full licenses. Full licenses are either offline licenses, or DLS-connected licenses. DLS-connected licenses contact DLS servers for authentication purposes - please see [Dynamsoft License Server](https://www.dynamsoft.com/license-server/docs/about/index.html) for more details. Full licenses may also be configured with add-on modules. ### Acquiring Full Keys

- [DLS-Connected Keys](#get-dls-keys) - [Offline Keys](#get-offline-keys)

DLS-connected license keys begin with the `DLS` prefix. Learn more about the Dynamsoft Licensing Server [here](https://www.dynamsoft.com/license-server/docs/about/activate.html). 1. Without add-ons: activate the license in the customer portal, then acquire the DLS key. This key only authorizes the use of the core DWT module. 2. With add-ons: activate the license and configure the core DWT module along with add-ons into one project in DLS, then acquire the DLS key. This authorizes the use of the add-on modules on top of the core module.

Offline license keys usually begin with the `f` prefix. 1. Without add-ons: activate the license in the customer portal, then acquire the offline key. This key only authorizes the use of the core DWT module. 2. With add-ons: activate the license in the customer portal, then acquire the offline keys. This may result in multiple license keys - one for the base DWT module, and separate ones for the add-ons. To use multiple keys in a single project, concatenate them (in any order) into a single string, separated with semicolons.

### Configuring Full License Keys To use a full license key, set the value of [`Dynamsoft.DWT.ProductKey`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#productkey) to the key string. (**Note**: prior to version 17.0, this property was `Dynamsoft.WebTwainEnv.ProductKey`) The configuration differs depending on how a project loads DWT resource files (see [loading library resources](/_articles/general-usage/resource-loading.md) for more details).

- [DLS-Connected Keys](#use-dls-keys) - [Offline Keys](#use-offline-keys) - [Multiple Offline Keys](#use-multiple-offline-keys) - [Package Managers](#full-keys-with-package-managers)

1. Locate the `dynamsoft.webtwain.config.js` file (or search for `ProductKey`). 2. Assign the license key string to [`Dynamsoft.DWT.ProductKey`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#productkey): ```javascript Dynamsoft.DWT.ProductKey = 'DLS******'; // Use an online key ``` 3. Load (or reload, if replacing an existing key) the web application and see that it starts scanning.

1. Locate the `dynamsoft.webtwain.config.js` file (or search for `ProductKey`). 2. Assign the license key string to [`Dynamsoft.DWT.ProductKey`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#productkey): ```javascript Dynamsoft.DWT.ProductKey = 'f********;'; // Use an offline key ``` 3. Load (or reload, if replacing an existing key) the web application and see that it starts scanning.

Offline license keys with add-ons should be concatenated (in any order) into a single string, separated with semicolons, and assigned to the same property (e.g. `f00******;f00******`). 1. Locate the `dynamsoft.webtwain.config.js` file (or search for `ProductKey`). 2. Assign the license key string to [`Dynamsoft.DWT.ProductKey`](/_articles/info/api/Dynamsoft_WebTwainEnv.md#productkey): ```javascript Dynamsoft.DWT.ProductKey = 'f00******;f00******'; // Use multiple offline keys ``` 3. Load (or reload, if replacing an existing key) the web application and see that it starts scanning.

## License Agreement View the Dynamic Web TWAIN License Agreement here.