If you don't need the syntax highlighting, keepassXC does a good job of this. It's a free password manager. You can create a new folder called code-snippets and

If you don't need the syntax highlighting, keepassXC does a good job of this. It's a free password manager. You can create a new folder called code-snippets and make the URL portion of each entry the code one-liner. You can copy url to clipboard from app with CTRL+U. This also has the nice property that you can password protect your snippets. You can also store them in notes or with attributes. Cherry Tree, Joplin, Zim, Trilium Notes; all have the ability to create a tree-like folder structure.