Description
When your project lives long time, site will get a lot of fake user’s registrations (usually made by spammers).
This tool will help you to clean this mess up. It can filter, select and delete packs of users.
See more information on https://shra.ru/hobbies/plugins/wordpress-inactive-user-deleter/ – plugin home page.
Screenshots
Remember, my plugin will never delete user No 1 or users having role ‘administrator’, and will do deleting operations only after message like that – <last warning>. 
Filtering page 
Trial users deleter tool 
Miscellaneous page
Installation
To install this plugin:
- Download plugin
- Extract and copy plugins files to /wp-content/plugins/inactive-user-deleter directory
- Activate it (enter to /wp_admin, then choose plugins page, press activate plugin)
- Go to /wp-admin/users.php?page=inactive-user-deleter.php and follow instructions there.
- Enjoy, I hope ??
FAQ
Please feel free to ask here: https://www.ads-software.com/support/plugin/inactive-user-deleter/
Reviews
Contributors & Developers
“Inactive User Deleter” is open source software. The following people have contributed to this plugin.
Contributors
Translate “Inactive User Deleter” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.65
Fix for trial user feature (reported by @yuvrajsisodia).
Also I added flag: “user has name” into filter (requested by @mypersonalwebmaster).
1.64
New search condition has been added – pending users (Requested by @tradenet).
1.63
Compatibilty with plugin Disable User Login was added, and some cosmetic changes (thanks to @wbenterprises for ideas).
1.62
Minor changes and fixes, testing with next core version of WP 6.3, and update discussed with @timmoser: now PHP max_input_vars limitation is not an issue.
1.61
Continue security fixing started at 1.59 (thanks FearZzZz).
1.60
Fix for PHP 8.0 Warning: Undefined array key “confirmPeriod” (requested by Hellnik).
1.59
Updates to protect all form against Cross-Site Request Forgery (CSRF) (requested by Graham aka grl570810).
1.58
No actual changes, just testing with next core version of WP 6.1.1
1.57
New filter: Woocommerce anonymous order filter (visible if Woocommerce is active) (requested by Luboslives).
New action: publish posts of selected users (requested by Fran).
1.56
Fixed bug in the disabled-users feature (reported by Fran).
1.55
New filter by user name (login) (requested by Fran).
1.54
New action: not to delete users, but change to draft status all their posts (requested by Fran).
1.53
Integration with two following plugins ‘user-login-history’ and ‘when-last-login’ to receive last known login date.
1.52
The User Level filter has been removed as deprecated. The User list can be exported into CSV file (requested by Fran).
1.51
Optional ability to disable an account instead of deletion (requested by evillizard). The disabled user cannot log-in and has the blocked status. The user also can be unblocked back.
Filter by UserRole was added (feature was requested by sonfisher).
1.50
Trial user deleter feature has been presented (requested by smallguy).
1.45
User email is shown in the list (requested by Arthur Brogard).
1.44
New filter by period after last login.
1.43
Tested with new core version of WordPress 5.0.
1.42
Flags are rebuilded. Now you have new option – “no matter”, if don’t want use a condition. I fixed some code in template (for translation purposes).
1.41
Hotfix for ‘known date log-in’ flag. Maybe it is not final ??
1.4
There was added Classipress support by user (aka Manish) request.
1.31
New MISC option – Email before delete. Thanks to KadGab for idea.
1.3
Added some features and few filters. Thanks to Greg Ross for new ideas.
1.2
Plugin resurrection. ?? I have done some requested features, fixed bugs, and fully rewrote code.
1.1
Plugin renovation. Bug fixing, some new options.
1.0
It was an initial version. Everything.