How to Open a .pub File Without Microsoft Publisher

Someone sent you a .pub file. You double-clicked it. Nothing happened.

You don't have Microsoft Publisher. Maybe you're on a Mac. Maybe you just don't have Office installed. Either way, the file won't open.

Here's how to open it anyway.

Why .pub files are a problem

Microsoft Publisher has been around since 1991, but it never got popular enough for other software to support its format.

Unlike Word documents (which Google Docs, Pages, and LibreOffice all open), .pub files are essentially locked to Publisher.

Microsoft never published the format specification. So other programs have had to reverse-engineer how .pub files work. Some have done this. Most haven't bothered.

Method 1: Convert it online with PubConvert (recommended)

The fastest way to get into a .pub file without Publisher. No download, no install, no account. Just:

  1. Go to pubconvert.com
  2. Drop your .pub file onto the page
  3. Pick your output format (PDF if you just need to view or print, Word or IDML if you need to edit)
  4. Click Convert
  5. Download your file

That's it. About 30 seconds from start to finish. Works on any device: Windows, Mac, Linux, Chromebook.

I recommend this over installing software for a few reasons. You probably got sent a .pub file and just need to see what's in it. You don't want to download and install a 300MB application for one file. PubConvert handles the conversion server-side and deletes your files afterward, so nothing lingers.

Previewing your file is free. And if you've got a stack of .pub files to deal with, PubConvert is the only online converter that handles batch conversion, up to 20 files at once (2GB total). That matters if you're cleaning out an archive or migrating old documents.

One thing to know: if you choose PDF, you get a static document. Great for viewing and printing, but you can't edit it. If you need to make changes to the content, choose Word instead. The Word export stays editable: real text boxes, real tables, real pictures.

Method 2: Install LibreOffice (good for ongoing use)

If you deal with .pub files regularly and want to work offline, install LibreOffice. It's free, open-source, and runs on Windows, Mac, and Linux.

  1. Download from libreoffice.org
  2. Install it (it's around 300MB)
  3. Open your .pub file with LibreOffice Draw

LibreOffice Draw can read Publisher files and let you actually edit them. You can also export to PDF, image formats, or LibreOffice's own .odg format.

This is a solid choice if you regularly receive .pub files and want a desktop application to handle them. The tradeoff is the install time and disk space, plus you'll need to keep it updated.

Fair warning: complex Publisher layouts don't always convert perfectly. Text might shift. Fonts might substitute. Simple documents usually look fine. (This applies to any non-Publisher tool, including PubConvert, since they all rely on the same reverse-engineered format support.)

Method 3: Ask the sender for a PDF

Sometimes the easiest solution is just asking.

"Hey, I can't open the .pub file you sent. Can you export it as a PDF?"

If they have Publisher, it's a 30-second task: File > Export > PDF. They probably should have sent a PDF in the first place.

Method 4: Use Publisher Online (if you have Microsoft 365)

Microsoft has a stripped-down version of Publisher that runs in the browser. Sort of.

Actually, let me correct that: Publisher Online doesn't exist as a full editor. There's no web version of Publisher like there is for Word or Excel.

Microsoft 365 subscribers can install the desktop Publisher app, but that requires Windows. No Mac version exists.

If you're a Microsoft 365 subscriber on Windows, you can install Publisher and open the file directly. But at that point, you're not really "opening without Publisher."

What you'll actually get

When you convert a .pub file to PDF, you get a static document. It looks like the original, but you can't edit it. Text and images are frozen in place.

If you need to edit the content, PubConvert gives you several output options:

  • Word (.docx) - An editable document with your layout intact: text boxes at their original positions, editable text, embedded images, real tables.
  • IDML - Opens editable in Adobe InDesign and Affinity Publisher. The best path if you're moving your design work to a modern layout program.

For most people, PDF is the right call. You just want to see what's in the file, print it, or forward it. If you need to make changes, go with Word, or IDML if you work in InDesign or Affinity.

Common problems

"The converted PDF looks wrong"

Some Publisher features don't convert well:

  • Rotated text often gets garbled
  • WordArt might look different
  • Unusual fonts get substituted
  • Text boxes may shift slightly

If the output looks wrong, try converting to a different format or using a different converter. Sometimes LibreOffice handles a file better than one online converter, or vice versa.

"The file is corrupted"

If multiple converters refuse the file, it might actually be corrupted. Or it might be a very old Publisher version (97, 2000) that uses a different internal format.

Try PubConvert or LibreOffice directly. They use different engines (we built our own, with LibreOffice as a fallback for stubborn files), so between them they handle edge cases that other converters choke on.

"The file is too big"

Large .pub files with lots of images can hit size limits on free converters. PubConvert handles files up to 1GB, which covers most Publisher documents. If your file is bigger than that, it's probably bloated with embedded high-res images.

Going forward: ask for PDFs

Once you deal with this file, consider the future.

If someone regularly sends you .pub files, ask them to send PDFs instead. It's just as easy for them (easier, really) and you won't have to convert anything.

Publisher's days are numbered anyway. Microsoft ends support for it in October 2026, weeks away now. People who still use it should probably start exporting to PDF as a matter of habit.

The quick version

To open a .pub file without Publisher:

  1. Drop it onto pubconvert.com for a quick conversion (fastest, no install)
  2. Install LibreOffice if you deal with .pub files regularly
  3. Or just ask the sender for a PDF next time

The first option takes 30 seconds, no signup required. Go try it with one file right now.

Got a .pub file you can't open? Drop it onto pubconvert.com and see inside it in 30 seconds. No signup, no install. Works on any device. The preview is free; unlimited conversions are a one-time $49.