Microsoft removed Publisher from Microsoft 365 on October 1, 2026. Tomorrow, October 13, 2026, support for perpetual Publisher (Office 2021) ends.
Your installed copy will not vanish overnight, and your .pub files will not be deleted. The app simply stops receiving security updates. However, almost no modern software outside of Microsoft Office opens .pub files natively. If you leave your archive as-is, you risk discovering years from now that your legacy templates, newsletters, or flyers are effectively locked away.
Here is a practical, 30-minute checklist to rescue your .pub archive before support lapses.
Step 1: Inventory your .pub files (5 minutes)
Search your local drives, shared network folders, and cloud sync directories for every file ending in .pub. Gather them into a single working folder (or note their paths) so you know the exact scope of what needs preservation.
Step 2: Set up a local converter (5 minutes)
You do not need to upload confidential files to random web converters. LibreOffice contains libmspub, an open-source library that parses Publisher files and converts them locally to PDF. Install LibreOffice if you do not already have it on your machine.
Step 3: Run a local batch conversion to PDF (10 minutes)
Export your .pub files to standard PDF format. PDF ensures that fonts, layouts, and vector artwork remain viewable on any modern operating system indefinitely. Run your conversions locally so your documents never leave your machine.
Step 4: Watch out for silent conversion failures (5 minutes)
Do not assume a batch script succeeded just because it finished without errors. Automated converters can exit with status code 0 while producing no PDF at all (a behavior verified with truncated files). Even worse, a renamed plain text file can pass through and fake-convert into an empty or corrupt shell.
Always verify output:
- Confirm that an output PDF actually exists on disk.
- Check that file size is non-zero.
- Ensure the converted file contains actual rendered text or visual elements.
Step 5: Review the conversion status (5 minutes)
A reliable migration uses a verification report that classifies every source file into one of three buckets:
- OK: The PDF exists, contains expected text content, and converted cleanly.
- REVIEW: The conversion completed, but the output contains unusually little text (for example, image-heavy posters or scanned assets) and requires manual visual inspection.
- FAILED: The process produced no PDF or threw an unhandled error.
Inspect the items flagged for REVIEW and FAILED while you still have access to a working desktop environment.
The silent-failure trap
Blindly looping libreoffice --headless --convert-to pdf in a shell script feels fast, but silent failures will burn you. Because libmspub parsers may exit cleanly even when encountering truncated headers or malformed streams, checking process exit codes alone is not enough. You need automated post-conversion checks on file size and extracted content to ensure your archive was genuinely preserved rather than silently skipped.
If you want an automated tool that handles the batch run and validation in one step, check out PubAudit. It is a free, MIT-licensed CLI that batch-converts a folder locally, classifies every file as OK / REVIEW / FAILED, and generates CSV and HTML reports. Your files are never uploaded anywhere.
Take thirty minutes today to turn your .pub archives into readable PDFs while you still have the tools to verify them.
Top comments (0)