Best .pub File Viewer: Free Online and Desktop Options Compared

A .pub file viewer lets you see a Microsoft Publisher document without Publisher. For a quick look, Korva's free online viewer opens the file in your browser without uploading it. To edit the file, export a PDF or work through many files, use Korva's desktop app. Publisher still works if it's installed, and LibreOffice Draw is a free second opinion.

There’s no built-in .pub previewer in Windows, macOS, Linux, Chrome, Safari or Edge. A .pub isn’t an image and isn’t a PDF. It’s a Publisher document stored in a proprietary binary format. That’s why double-clicking one usually fails unless Publisher or another compatible tool is installed, and why “just open it in the browser” doesn’t work without help.

The good news is that you have more choices than you might think, including one that doesn’t need an install or an upload. Here’s how the options compare and how to pick.

What a good .pub viewer should do

Before comparing tools, it helps to know what you’re judging them on. A good .pub viewer should:

• Actually read the Publisher format, not just show a file icon or a thumbnail.
• Show both text and images. Some tools recover one and drop the other.
• Handle accented characters. If your documents are in French, Spanish or German, mangled accents make a viewer useless.
• Keep private files private. A viewer that reads the file on your device is safer than one that sends it to a server.
• Give you a PDF when you need one. Viewing is often the first step. Printing, emailing or archiving usually comes next.
• Be honest about fidelity. Publisher’s format is undocumented, so no outside tool reproduces every file perfectly.

.pub file viewer comparison

Two columns matter most. Uploads the file? decides whether a viewer is safe for private documents. Can edit? decides whether you’ll need a second tool after you’ve looked at the file.

Option 1: Korva’s free online .pub viewer (no upload)

Korva’s online .pub viewer is the fastest way to see what’s inside a Publisher file without installing anything. Open the page, choose the .pub, and the viewer shows the pages as a PDF preview in your browser.

What sets it apart from most online viewers is where the work happens. The page loads a small WebAssembly engine, and your browser reads the file on your own device. The .pub isn’t sent to a server for conversion. So it’s a reasonable choice even for a file you wouldn’t hand to an unknown website.

How to use it:

1. Open the .pub viewer in a current browser.
2. Choose your .pub file. The viewer is built for files up to 40 MB.
3. Read the pages in the PDF preview.

Use it when you just need to see what’s in a file, you’re on a computer where you can’t install software, or you want to check a file before deciding what to do with it.

Look elsewhere when the file is larger than 40 MB, you need to change something, or you have a whole folder of old files. Those jobs belong in the desktop app. Phones and tablets aren’t what the browser tools are built for, so on a phone, treat the viewer as a best effort.

Option 2: Korva desktop app (viewer, editor and converter)

Korva is a local desktop .pub viewer and editor for Windows, macOS and Linux. It opens Publisher files with their layout and lets you edit them and export PDF, all without an account or an upload.

This is the right fit when:

• you don’t have Publisher installed
• you’re on a Mac or Linux computer
• the file is private
• you need a PDF copy
• you want to change names, dates, images or layout
• you have more than one file to deal with

Korva opens the pages at their original size, with text boxes, pictures and shapes where Publisher placed them, linked text boxes flowing as they did in Publisher, and the formatting, accented characters included, carried across. It doesn’t promise a perfect clone of Publisher’s layout. Fonts that aren’t installed are replaced, so check that text still fits, and very complex designs may need a quick touch-up. The Import Health panel says what was kept and what to check, and the original .pub is never changed.

The Free tier opens and edits any .pub, and a new user can export their first complete project as often as needed. Korva Pro is a one-time $49 purchase for one computer. It adds unlimited project exports, batch conversion, editable .kva saves, mail merge and master pages. Everything runs locally and offline, with no account. Get it from the download page.

Option 3: Microsoft Publisher

Publisher is the most faithful viewer for .pub files because it created the format. If you still have a working copy, use it to open important files and export PDFs while it still runs.

The weakness is availability. Publisher was Windows-only, and since October 1, 2026, it’s no longer part of Microsoft 365. It gets no updates, and you can’t download it again through your Microsoft account. An old install is a good bridge while it lasts, but not a viewer to rely on for years. Our guide to Publisher’s end of life covers what that means for your files.

Option 4: LibreOffice Draw

LibreOffice Draw can open some .pub files using the libmspub import filter. It’s free, open source and local, so it deserves a place on the shortlist, especially if you already have LibreOffice installed.

The limitation is consistency. Some files import well. Others arrive with shifted objects, missing images or odd text flow. Draw also can’t save back to .pub. It saves as OpenDocument Drawing or exports PDF. For simple public files, try it. For an important archive, compare the result carefully before assuming it’s good enough. We go deeper in LibreOffice Draw vs Publisher.

Option 5: Upload-based online viewers

Most “online .pub viewers” work by uploading the file, converting it on a server, then showing you a PDF or an image preview. That can be convenient, but it isn’t neutral. You’re sending the whole document to someone else.

Before you use one, ask:

• Does the site say how long it keeps uploaded files?
• Is there a clear privacy policy, and a real company behind it?
• Is the preview free, or do you pay to download the result?
• Does it show both the text and the images from your file?

Use upload-based viewers only for non-sensitive documents. Avoid them for member lists, school documents, client drafts, internal notices, donor material or anything confidential. If you want a browser tool without the upload, that’s exactly what the local viewer and browser converter are for. Our offline converter guide explains why the difference matters.

.pub viewer and converter: do you need both?

“Viewer” and “converter” get used interchangeably, but they do different jobs:

• A viewer shows you the pages. You read them, and that’s it.
• A converter gives you a new file, usually a PDF, that you can keep, print, email or archive.
• An editor lets you change the content before you convert.

Korva covers all three, depending on where you run it. In the browser, the viewer shows the pages and the converter saves a PDF, both free and both local. On the desktop, the Korva app views, edits and exports in one place. If you think you’ll need a PDF anyway, skip straight to the converter or the desktop app. For the conversion side in detail, see how to convert a .pub to PDF.

How to choose a .pub file viewer

Answer these in order, and the choice usually makes itself.

1. Is the file private? If it contains names, addresses, finances or anything unannounced, rule out upload-based viewers. Stick with Publisher, Korva (online viewer or desktop) or LibreOffice Draw.

2. Can you install software? If not, use the online viewer for a look, or the browser converter for a PDF.

3. Do you only need to look, or also to change something? Looking is a viewer job. Changing a date, a name, a photo or a layout needs an editor, which means Korva desktop, Publisher, or LibreOffice Draw with some patience.

4. How many files? One file is a viewer or converter job. A folder of old bulletins, newsletters or flyers is a batch job. See how to batch convert .pub files to PDF.

5. Which computer? Publisher is Windows-only. Korva and LibreOffice Draw run on Windows, Mac and Linux. The browser tools run in a current browser on a computer, including Chromebooks.

Here’s how that plays out in common situations:

Viewing .pub files on Windows, Mac, Linux and phones

The details differ a little by platform, so we’ve written focused guides:

• Windows: Korva, Publisher or LibreOffice Draw, plus how to set the default app. See how to open a .pub file on Windows.
• Mac: Publisher never ran on macOS, and Pages and Preview can’t read .pub. See how to open a .pub file on a Mac.
• Linux: Korva has a native 64-bit build, and LibreOffice Draw is the free alternative. See how to open a .pub file on Linux.
• Phones and tablets: there’s no Publisher app and no Korva mobile app. Convert to PDF on a computer, or try the online viewer as a best effort. Our main guide on how to open a .pub file covers phones, iPhones and Chromebooks in more detail.

Do you need a viewer or an editor?

If the goal is only to see what’s inside, view the file and, if you need a copy, export a PDF. A PDF is the durable copy you can email, print and archive.

If you need to change names, dates, images or layout, a viewer isn’t enough. Korva opens the .pub with its layout as an editable copy and lets a new user repeatedly export one complete project. Pro adds later projects, batch conversion, editable .kva saves, master pages and mail merge.

For more background on the format itself, read what a .pub file is. Microsoft Publisher is a trademark of Microsoft Corporation. Korva is independent and not affiliated with Microsoft.