Files with the extension .pub are publications created in Microsoft Publisher, a app for layout of printed products. It’s easy to open them on a PC, but on Android users often encounter problems: the system does not recognize the format, and standard document viewers give an error. The reasons lie in the proprietary nature of the format .pub —it is not intended for mobile devices and requires special solutions.

In this article we will examine 5 working ways open .pub on a smartphone: from installing specialized applications to converting to universal formats like .pdf or .jpg. We will pay special attention safety of downloading files from unverified sources —this is critical for Androidwhere malware is often disguised as “document viewers.” You will also learn how to avoid losing formatting during conversion and what to do if the file is damaged.

What is a PUB file and why is it difficult to open on Android

Format .pub developed by the company Microsoft exclusively for the app Publisher -analog Adobe InDesign, but with an emphasis on simple layout of booklets, business cards and leaflets. Unlike .docx or .pdf, it does not have an open specification, therefore:

  • 🔹 No built-in support v Android: the system does not recognize the extension as a document or image.
  • 🔹 Limited selection of applications: even popular viewers (for example, Google Drive or WPS Office) do not work with .pub.
  • 🔹 Risk of loss data: when converting to other formats, the layout, fonts or graphic elements often “shift”.

In addition, files .pub may contain built-in fontsthat are not installed on the smartphone, or links to external resources (for example, images from network drives). This complicates their correct display even in specialized apps.

⚠️ Attention: If the file .pub arrived by mail or messenger from an unknown sender, Do not open it directly —first check for viruses via VirusTotal or a similar service. Attackers often use rare formats to distribute malware.

Method 1: Install specialized applications for PUB

The most reliable method is to use apps that directly support the format .pub. There are not many of them, but we have selected proven options: Google Play There are few of them, but we have selected proven options:

Application PUB support Additional. features Cons
Pub Reader ✅ Full View, zoom, export to PDF Advertising, premium fee
File Viewer for Android ✅ Partial (viewing only) Supports 150+ formats No editing
OfficeSuite ⚠️ Only in the premium version Editing, cloud storage Expensive subscription

To install:

  1. Open Google Play and enter the name of the application in the search (for example, Pub Reader).
  2. Click Install and wait for the download to complete.
  3. Run the app and select the file .pub via the built-in explorer or menu Open file.

Download the application from the official store|Check the reviews and rating (minimum 4.0)|Do not give the application access to contacts or SMS|Create a backup copy of the file on the cloud-->

If the file does not open after installation, try:

  • 🔄 Reboot the smartphone - sometimes helps with conflicts with cache.
  • 📁 Move the file to the root folder of the device (for example, Downloads), if it is on the SD card.
  • 🔧 Update the application to the latest version via Google Play.

Google Drive|Microsoft Office|WPS Office|Other|I don’t work with documents-->

Method 2: Convert PUB to PDF on PC (the most reliable option)

If you have access to a computer with Windows or macOS, the optimal solution is to convert the file to .pdf in advance. This format is supported by all smartphones and retains the original formatting:

  1. Download and. install Microsoft Publisher (included in the package Microsoft 365) or a free alternative LibreOffice Draw.
  2. Open the file .pub through the app: 
    File → Open → Select your document.pub
  3. Export to PDF: 
    File → Export → Create PDF/XPS → Save as...
  4. Transfer the received .pdf to your smartphone via Google Drive, Telegram or cable.

Advantages of the method:

  • 📄 100% preservation of layout (fonts, colors, alignment).
  • 🔒 Security: there is no risk of infecting your smartphone with malware.
  • 📱 Universality: .pdf will be opened by any viewer on Android.
⚠️ Attention: If .pub were used in the file, they may be replaced with system ones when converting to PDF. To avoid this, before exporting to non-standard fonts, when converting to PDF, they can be replaced with system ones. To avoid this, before exporting to Publisher select the option Embed fonts (found in the PDF saving settings).
💡

If you do not have access to a PC, try online converters like Zamzar or CloudConvert. But remember: by uploading a file to a third-party service, you risk its confidentiality. For sensitive data, use only offline methods.

Method 3: Online viewers (for one-time tasks)

If conversion to a PC is not possible and you don’t want to install applications, you can use web servicesthat open .pub directly in browser. Popular options:

  • 🌐 Pub2PDF —converts to PDF without registration.
  • 🌐 Sejda —supports editing before saving.
  • 🌐 ILovePDF —batch mode for multiple files.

How to use (on example Pub2PDF):

  1. Open the site in your smartphone browser (Chrome or Firefox).
  2. Click Upload file and select .pub from the device memory.
  3. Wait for processing (usually 10–30 seconds).
  4. Download the received .pdf or view it directly on the website.

Limitations of online services:

  • 🚫 Limit on size (usually up to 50 MB).
  • 🕒 Processing queue during peak hours.
  • 🔒 Risk of data leakage —do not use for confidential documents.
What to do if the service does not accept the file?

If the online converter gives an error "Unsupported format", check:

1. File extension: sometimes .pub disguises itself as other formats (for example, .pub.txt). Rename it manually.

2. File integrity: try opening it on a PC - if there is also an error there, the file is damaged.

3. Publisher version: old files (before 2007) may not be supported by modern ones services.

Method 4: Using cloud storage with preview

Some cloud services (for example, OneDrive or Dropbox) can data-i="182">files preview files .pub without full download. This is convenient if you need to quickly evaluate the contents of a document. Instructions:

  1. Download the file .pub to your cloud storage (for example, via the web version OneDrive).
  2. Open the storage on your smartphone through the official application.
  3. Find the downloaded file and tap on it. If the service supports the format, a preview window will open.
  4. If necessary, save a copy in .pdf via the menu Export or Save as.

Services with support .pub:

Service Preview Export to PDF
OneDrive ✅ Yes ✅ Yes
Dropbox ⚠️ Only for business accounts ❌ No
Google Drive ❌ No ❌ No
⚠️ Attention: The functionality of cloud services may change. For example, OneDrive previously supported editing .pub, but now only viewing is available. Before downloading, check the current capabilities in the service help.

Method 5: Manual conversion to an image (for simple documents)

If the file .pub contains only text and simple graphics (for example, a business card or poster), you can convert to image (.jpg or .png) and open with any gallery application. To do this:

  1. On your PC, open the file in Microsoft Publisher.
  2. Take a screenshot of the page (PrtScn on the keyboard) or export to an image: 
    File → Export → Change file type → JPEG or PNG
  3. Transfer the resulting image to your smartphone.

Pros of the method:

  • 📸 Does not require special applications - quite standard Galleries.
  • 🔒 Safe for confidential data (no uploading to third-party services).

Cons:

  • 🔍 Loss quality when scaling.
  • 📝 Cannot copy text (if editing is needed).
💡

Converting to an image is only suitable for documents with minimal text. For multi-page publications (for example, magazines), use conversion to PDF.

Common errors and their solutions

When working with .pub on Android users encounter typical problems. Let's look at the most common ones:

Error Cause Solution
"The file is damaged" Incomplete download or error when saving Try to resend the file or open it on your PC
"Format not supported" The application does not recognize .pub Use specialized apps (see Method 1)
"The text is displayed crooked" Missing fonts Convert to PDF with fonts embedded
"File too large" Online service limitation Split the document into parts or use PC

If none of the methods worked:

  • 🔎 Check the file extension - sometimes .pub is confused with .ppt (PowerPoint presentations) or .pubxml (XML version of the publication).
  • 📧 Request the file in a different format with the sender (for example, .pdf or .docx).
  • 🛠️ Recover the file using tools like Recuva (if it was deleted or damaged).
Is it possible to edit a PUB file on Android?

Full editing is impossible - no mobile application supports all functions Microsoft Publisher. Maximum available:

  • 📝 Editing text in converted PDF (via Adobe Acrobat Reader).
  • 🖼️ Adding notes over the image (via Google Keep or Xodo PDF).

For serious edits use a PC.

Why do fonts disappear after conversion to PDF?

This happens if the original file .pub were used non-standard. fontssolutions:

  1. On PC in Publisher before exporting, select the option Embed fonts.
  2. Replace fonts with standard ones (for example, Arial or Times New Roman).
  3. Convert to an image if the layout is critical.
How to open PUB on Android without the Internet?

You will need:

  1. Install an offline application (for example, Pub Reader).
  2. Or convert the file in advance to .pdf/.jpg on a PC and transfer to a smartphone.

Online services and cloud storage require a network connection.

Is it safe to open PUB files from unknown sources?

Files .pub may contain:

  • 🦠 Malicious macros (if created in older versions Publisher).
  • 🕵️ Hidden scriptsthat exploit viewer vulnerabilities.

Always check files through VirusTotal or similar services before opening.

Is it possible to open PUB on Android via Microsoft Office?

Official application Microsoft Office for Android does not support format .pub. It only works with:

  • 📄 .docx, .xlsx, .pptx;
  • 📑 .pdf (viewing only).

For .pub use specialized solutions from this article.