First install Keplr wallet extension in your web browser.
Keplr does not support adding custom network from its user interface. But it provides a way (using code) add local network its UI.
Click on "Run Pen" button below and then click on the "Add Hypersign Local Network To Keplr" button.
{% embed url="https://codepen.io/Vishwas1/pen/PodQxWy" %}
The Keplr will popup and ask you to accept. Once accepted , you will see your local network in the network list of Keplr wallet.
Note: Make sure you network is running on port 25567
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