SSH Keys Manager

SSH Keys Manager gives your ~/.ssh folder, or another directory you choose, a graphical front end. It lists key pairs with their metadata, generates, renames, duplicates or removes keys, and edits SSH config host entries including their IdentityFile lines.

The project notes that its GitHub release builds are unsigned and not notarised, so macOS may refuse to open them until the quarantine attribute is removed. Because it handles private keys, back up your SSH folder before bulk changes.