To export all jobs from a SQL server.
Open ssms,connect to your sql server.Navigate to SQL Server Agent– jobs.
Click View and select Object Explorer Details or press F7. The Object explorer details window should open on the right. Select all the jobs,right click select Script job as-Create to — File. Select a location and give any file name and save.
All the jobs would be exported as a single file and you can run that on any other database to restore all the jobs.