Browser-based tools for everyday IT administration
Opselith is an independent IT administration toolkit built for administrators who want clear, reviewable tools without giving a website direct access to their Microsoft 365 tenant.
What Opselith does
Opselith helps administrators build and review PowerShell scripts, prepare Microsoft 365 migrations, validate mapping files and use focused browser tools for CSV, data and identity work.
The main workspaces are the PowerShell Builder and the Migration Workspace. Smaller browser tools cover common tasks such as CSV repair, data conversion, list comparison, password generation and JWT inspection.
Built for administrator review
Opselith does not run generated PowerShell in your environment. Administrators review generated scripts and run them in their own PowerShell session with the permissions they choose.
Core browser tools and Migration Workspace file checks are designed to process working data locally in the browser. Opselith does not connect directly to your Microsoft 365 tenant for those workflows.
Independent software
Opselith is an independent product. It is not Microsoft and is not affiliated with or endorsed by Microsoft. Microsoft 365, PowerShell, Entra, Teams and SharePoint are referenced because Opselith provides administration workflows for those technologies.
Free and Pro
Free tools remain useful on their own. Opselith Pro adds selected advanced PowerShell templates, Packs and migration outputs. Critical safety findings in Migration Workspace are not hidden behind Pro.
Contact Opselith
Questions, bug reports and feature ideas can be sent to support@opselith.com.
Official profile
Opselith also maintains an official public organization profile on GitHub. Product source code remains private.