# Browser ("Web3")
The Xumm SDK can run fully client side: either as part of your compiled web app or using plain HTML and Javascript using our ready to use [browserified](https://xumm.app/assets/cdn/xumm.min.js) version.
Using the Xumm SDK, you can easily add "Sign in with Xumm" capabilities to your web app. You don't even need a backend. You get the full "Web3" experience (sign in with a blockchain account) with our "Web2" compatible stack (see: [Identity (OAuth2, OpenID)](/environments/identity-oauth2-openid.md) / [Native Apps](/environments/native-apps.md)).
{% hint style="success" %}
Make sure to add the **return URL** (also known as **redirect URL**) in the Xumm[ Developer Console](https://apps.xumm.dev/) on the application home page in the "**Origin/Redirect URIs (one per line)**" field.
{% endhint %}
## Capabilities
Using the Xumm SDK in your web project, you get:
* Sign in with a QR code for when loaded on a desktop
* Deeplink (redirect to Xumm, back to your web app) on mobile
* Basic user information: XRP Ledger account address, icon (hashicon or even avatar), connected chain (mainnet, testnet, ..) & some basic information about the end user's environment (currency, language, ...)
* An access token (JSON Web Token "JWT") valid for 24h, to actively send (push) Sign Requests (transactions for the end user to sign)
## Sample code
{% hint style="info" %}
Please note the **`xumm.authorize()`** and **`xumm.logout()`** methods:
{% endhint %}
{% code lineNumbers="true" %}
```html
...
```
{% endcode %}
### More links
For the SDK documentation (objects, methods), see the SDK section: [SDK (syntax)](/js-ts-sdk/sdk-syntax.md). For a simple demo of the Xumm SDK in a React Native environment, check this sample repository: [https://github.com/XRPL-Labs/XummSDK-React-Demo](https://github.com/XRPL-Labs/XummSDK-React-Demo/)
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