Hello Pinakin,
You have multiple options to restrict access.
- Go to Settings and click Site permissions.
- Select Advanced permissions settings.
- Choose Permission Levels and click Add a Permission Level.
- Create a custom permission level that only allows users to view pages, list items, and documents without download permissions.
Or
- After creating a site/subsite for document management, go to Site Settings.
- Click Site Permissions and then select Stop Inheriting Permissions. This will give the site unique permissions, allowing you to customize access.
Let me know if it works.