Note: Importing from a file adds entries in bulk and cannot be undone automatically — review your file carefully before uploading. You can optionally tag all imported URLs with a single Category to save time.
STEP ONE
Go to Policy and select Allow List (or Block List to import blocked sites instead).
Policy menu with Allow List highlighted
STEP TWO
Click Import from... above the list, then choose File from the dropdown. (Choosing Global List instead lets you import from a shared organization-wide list.)
Import from... dropdown with File option
STEP THREE
In the Import from File window, click Download Template File to get a correctly formatted starter file. Optionally choose a Category from the dropdown to automatically tag every URL you import with that category.
Import from File modal — Download Template File button and optional Category selector
STEP FOUR
Open the downloaded template, add your URLs following its format, then save it. Click the upload area (or drag your file into it) to begin the import.
Click or drag file to this area to upload
Related: How to Allow a Website · How to Block a Category