How to update all profiles with the same Custom Object Permissions?

Question

The case: I created a custom object. After that, I need to give permissions to all profiles. I have a lot of profiles. And editing each one is time-consuming. Is there a way to update all profiles at one time?

Answer 1

For Field Level Security:

Setup > Security Controls > Field Accessibility > Select Object Name > Select View by Fields

You can then edit permissions for each field by profile, one field at a time.

Answer 2

UPDATED ANSWER

The way to do this in 2019 is to create a custom Profile List View and edit Object Permissions en masse.

See the Salesforce documentation of the process here: Edit Multiple Profiles with Profile List Views

If enhanced profile list views are enabled for your organization, you can change permissions in up to 200 profiles directly from the list view, without accessing individual profile pages.