# Provisioning devices that have device certificates
<a name="provision-w-cert"></a>

AWS IoT provides three ways to provision devices when they already have a device certificate (and associated private key) on them:
+ Single-thing provisioning with a provisioning template. This is a good option if you only need to provision devices one at a time.
+ Just-in-time provisioning (JITP) with a template that provisions a device when it first connects to AWS IoT. This is a good option if you need to register large numbers of devices, but you don't have information about them that you can assemble into a bulk provisioning list.
+ Bulk registration. This option allows you to specify a list of single-thing provisioning template values that are stored in a file in an S3 bucket. This approach works well if you have a large number of known devices whose desired characteristics you can assemble into a list. 

**Topics**
+ [Single thing provisioning](single-thing-provisioning.md)
+ [Just-in-time provisioning](jit-provisioning.md)
+ [Bulk registration](bulk-provisioning.md)