Automatically Save Google Docs as PDF as a Nightly Backup
Automatically saving as a nightly backup captures a daily snapshot of your documents. Even though Google Docs has version history, a nightly PDF backup gives you a human-readable archive that does not require navigating revision history to access.
Setting up the nightly trigger
Automatically saving as a nightly backup starts with a daily trigger in Apps Script. Set the trigger to Time-driven > Day timer and choose a time like 2 AM when editing activity is low. The script exports all documents in the source folder and saves the PDFs to an archive folder.
Using date subfolders for the archive
Save each night's PDFs to a subfolder named with the date, for example Archive/2026-03-13. The script creates the subfolder if it does not exist. This organizes backups by date and makes it easy to find the version from any specific day.
Managing archive size
Daily backups accumulate quickly. After a month, you have thirty sets of PDFs. Consider keeping daily backups for the past two weeks and weekly backups for older periods. Add logic to the script to delete backups older than a set number of days, or move them to a cold archive folder.
Frequently Asked Questions
Is a nightly PDF backup worth the effort for Google Docs?
For most personal documents, Google's version history is sufficient. For business-critical documents, regulated content, or documents that need to be preserved as of a specific date for legal or compliance reasons, nightly PDF backups add an extra layer of protection.
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