# Overview

Offline application is an important tool for token pre-issuance. It is used by both admins and corporate users on the platform.

With an offline application, you can:

* [Generate a pre-issuance file ](https://tokend.gitbook.io/product-guide/user-guide/offline-application/keyfile-generation)*(this file contains a transaction for token pre-issuance. A user will later upload this file to the platform to actually pre-issue the tokens.)*
* [View the existing pre-issuance files](https://tokend.gitbook.io/product-guide/admins/offline-application/pre-issuance-file-review) data
* [Change asset issuer](https://tokend.gitbook.io/product-guide/user-guide/offline-application/change-asset-issuer) *(this operation is essential if the previous issuer – the one responsible for the creation of pre-issuance files – is no longer trusted due to any reason and you have to prevent him/her from being able to create the pre-issuance files)*
* [Generate a keyfile](https://tokend.gitbook.io/product-guide/user-guide/offline-application/keyfile-generation) *(you can use this file to log in to the offline application and sign the transactions).*

### How to use an offline application

Essentially, it’s an application a user opens on their computer. The operation with an offline application is as follows:

Step 1. Launch the offline application\
Step 2. [Log in to the offline application](https://tokend.gitbook.io/product-guide/user-guide/offline-application/log-in-to-the-offline-application)\
Step 3. Carry out all the required operations\
Step 4. Log out