How to convert many .pub files.

Inventory the archive first

Before converting a folder, make a copy or verify your backup. Count the .pub files and note where they live: local folders, shared drives, deep directory trees or OneDrive placeholders. Save a list of paths so you can compare it with the output later. Include a few examples from each period and each kind of document, such as newsletters, forms, flyers and templates.

A large folder may contain duplicates, temporary copies and damaged files. Keep those distinctions visible. Do not rename or move originals during the first pass; a consistent source path makes it easier to investigate a conversion note or rerun a failed file.

Choose the route that is available now

If Publisher still opens, Microsoft provides a sample script for exporting every .pub file in a folder to PDF. The script needs Publisher installed and licensed. Test it on a small copied folder, read its instructions, and compare the number of PDFs with the number of source files. Microsoft 365 subscribers can use Publisher only until it is removed on 1 October 2026.

If you have a one-off Publisher version, it keeps working after support ends on 13 October, but without updates. Use the time to export important archives. The retirement guide explains the dates. If Publisher is unavailable, most general office importers work one file at a time, which makes a large archive hard to audit.

Run a representative pilot

Pick a small set that includes long documents, uncommon fonts, tables, linked text boxes and older images. Convert those first, then inspect every page. Compare page counts and sizes, read text across linked boxes, and look for blank or shifted pictures. Check the output at print size if the documents might be printed again.

Write down the issues you see and whether they affect only one file type. A single perfect flyer tells you little about a folder of mixed documents. A pilot gives you a realistic review checklist before you spend time on the full batch.

Process folders with PUB Rescue when available

PUB Rescue is a Windows app being prepared for release. It converts .pub files in a folder to PDF and editable PowerPoint on your own computer, writing output into a new folder with the same structure. It leaves the source untouched and creates reports for individual files and the batch. The batch report can be read as a web page or exported as CSV.

The app has been tested on batches of 1,000 files. If a file is damaged, the rest of the batch continues and the report identifies the one that could not be converted. A later run can skip files that have not changed. It can read network drives, long paths and files stored only in OneDrive, which Windows downloads when needed. PUB Rescue is currently on a waitlist, not available to purchase or download.

Reconcile the output

Compare your source inventory with the batch report. Every source path should have a clear outcome: converted, converted with notes, or could not be converted. Do not treat a folder full of PDFs as proof that every source was handled. Review notes for missing fonts, unsupported effects and text that did not fit, then assign a person to check the affected pages.

Spot-check files from the beginning, middle and end of the folder tree, plus every unusual type from the pilot. Open the PDF and, where future editing matters, open the PowerPoint and confirm text can be selected and changed. For more detail, see the PDF guide.

The editable output guide offers more detailed checks.

Preserve and hand over the result

Keep the .pub originals, the converted files and the reports together in a documented archive. Record the date, conversion method and any manual corrections. Back up the source separately from the output so a mistaken cleanup does not remove both. If someone else will maintain the archive, give them the inventory and explain which files need review.

For organizations, the useful deliverable is more than a folder of PDFs: it is a traceable result for every source file. Work through the exceptions before declaring the archive complete. If you only have a handful of files, start with the guide to opening a single .pub file instead.