Convert Publisher Files to PDF Without Installing Anything

You have a .pub file. You don't have Microsoft Publisher. You need a PDF.

This is a common situation now that Microsoft is discontinuing Publisher in less than a year. Here's how to convert .pub files to PDF using just your browser.

Why this is harder than it should be

Microsoft Publisher uses a proprietary file format. Unlike .docx or .xlsx, which other programs can usually open, .pub files are locked to Publisher.

Microsoft Word can't open them. Google Docs can't open them. Preview on Mac definitely can't open them.

Your options are:

  1. Install Publisher (requires a Microsoft 365 subscription or buying Office)
  2. Install LibreOffice (free, but it's a 300+ MB download and the output varies)
  3. Use an online converter (no installation, just a browser)

If you're here, you probably want option 3. It's the fastest path from .pub file to usable PDF.

How online .pub converters work

Online converters run Publisher-compatible software on their servers. You upload your file, the server converts it, you download the result.

The whole process happens in your browser. You don't install anything. The conversion usually takes 10-30 seconds depending on file size.

Most converters use LibreOffice on the backend. LibreOffice has an engine that can interpret .pub files, and for years we used it too. In 2026 we replaced it with our own conversion engine, built from scratch for .pub files.

Step-by-step: converting a .pub file to PDF

Here's how it works with PubConvert:

  1. Go to pubconvert.com
  2. Drag your .pub file onto the page (or click to browse)
  3. Select PDF as the output format
  4. Click Convert
  5. Download your PDF

The whole thing takes about 10 seconds. No signup, no account, no email address. The preview is free, so you can check the output quality before you pay anything. Downloading the converted file is a one-time $49 for unlimited use. Files are deleted from the server after conversion.

What about quality?

Here's the honest answer: it depends on your file.

Simple documents convert well. Text, basic images, standard layouts. These usually come out looking almost identical to the original.

Complex layouts can have issues. If your Publisher document has:

  • Rotated text
  • Text wrapped around shapes
  • WordArt
  • Unusual fonts
  • Layered graphics

...you might see some differences. Text might shift. Fonts might substitute. It's not always perfect.

This was long a limitation of most online converters, because nearly all of them run the same LibreOffice engine underneath. It's a big part of why we built our own engine, focused on the traditionally hard parts: WordArt, tables, clip art, and gradients.

PDF vs Word vs IDML

Most converters offer multiple output formats. Here's when to use each.

PDF is best for preserving the exact layout. Use it when you need to print the document or share it as-is. The layout will match the original as closely as possible.

Word (.docx) is the right call if you need to edit the content. Our converter rebuilds the document as a real Word file: text boxes at their original positions with editable text, embedded images, and actual tables. Fix a typo, change a date, keep going.

IDML is for people moving their design work somewhere serious. It opens editable in Adobe InDesign and Affinity Publisher, with your pages, text frames, and images where you left them. If Publisher's retirement is pushing you to new layout software, this is the bridge.

File size limits and batch conversion

Most free online converters have size limits. Common limits are 50MB, 100MB, or 500MB.

If your .pub file is unusually large (some newsletters with lots of images get big), check the converter's limit before uploading. PubConvert handles files up to 1GB, which should cover most Publisher documents.

If you've got a whole archive of .pub files to convert, PubConvert is the only online converter that lets you batch convert up to 20 files at once (2GB total). Drop them all on the page, pick your format, and convert in one go instead of doing them one by one.

Is it safe?

Reasonable question. You're uploading files to someone's server.

Things to look for:

  • Does the site delete files after conversion?
  • Is there a privacy policy?
  • Is the connection HTTPS?

For sensitive documents (financial info, personal data), you might want to use a local solution like LibreOffice instead. For general newsletters and flyers, online converters are fine.

When online conversion isn't enough

Sometimes you need the actual Publisher file to remain editable. Online converters can't help with that. They output static formats (PDF) or limited-edit formats (Word with images).

If you need to keep editing .pub files long-term, your options are:

  • Keep a perpetual license of Office with Publisher
  • Use LibreOffice Draw for editing (with some layout compromises)
  • Recreate the document in another tool like Canva or InDesign

For most people, converting to PDF is good enough. You preserve the layout for printing and archival. You just can't edit it anymore.

If you just need a quick PDF from a .pub file, drop it onto pubconvert.com and you'll have your answer in about 10 seconds. Test on a few files first, especially if your layouts are complex. If the output looks good, batch convert the rest.

Ready to try it? Drop your .pub file onto pubconvert.com right now. No signup, no install. PDF, Word, or IDML. Preview your file free.