How to export all data from table to an insertable sql format?

Quick and Easy way:

1. Right click database
2. Point to tasks In SSMS 2017 you need to ignore step 2 - the generate scripts options is at the top level of the context menu Thanks to Daniel for the comment to update.
3. Select generate scripts
4. Click next
5. Choose tables
6. Click next
7. Click advanced
8. Scroll to Types of data to script – Called types of data to script in SMSS 2014 Thanks to Ellesedil for commenting
9. Select data only
10. Click on ‘Ok’ to close the advanced script options window
11. Click next and generate your script

I usually in cases like this generate to a new query editor window and then just do any modifications where needed.