Quick answer: it's safe if the tool processes the file in your browser rather than uploading it. Many online converters copy your file to their servers, a poor fit for newsletters with names or photos. Free Pub Editor reads .pub files on your own device; nothing is uploaded. You can check any site yourself in a minute.
What's the difference between an upload converter and an in-browser tool?
| Upload converter | In-browser tool | |
|---|---|---|
| Where the file is processed | On the company's server | On your own computer |
| Who could see the file | The company, its hosting provider, anyone who breaches them | Only you |
| How long the file is kept | Depends on their policy | It never leaves your device |
| Works with a slow connection | Large files take a while to upload | Yes, once the page has loaded |
| Typical result | A download link to a PDF | The editable document, in your browser |
Upload converters aren't automatically unsafe. Many delete files after a set time. But you're relying on their promise, and you usually can't verify it. An in-browser tool removes that question.
Why does this matter for schools, churches and clubs?
Publisher was popular with exactly the organisations whose documents are most personal. A typical school newsletter has children's names and photos. A church bulletin can list prayer requests, rosters and phone numbers. A club's membership form template may include addresses. Sending those to an unknown server, even briefly, is the kind of thing many privacy policies and data-protection rules ask you to think twice about.
If you're responsible for documents like these, check your organisation's policy on online tools, and prefer one that doesn't upload.
How can I check whether a website uploads my file?
You don't need to take anyone's word for it, including ours. Two simple tests:
Test 1: Watch the network
- Open the site in Chrome or Edge, then press Ctrl+Shift+J (Windows) or Cmd+Option+J (Mac) to open developer tools, and click the Network tab (Chrome DevTools docs).
- Click the clear button so the list is empty.
- Open your .pub file on the site.
- Look for a new request with a large size, roughly the size of your file. Click it: if its payload contains your file, it was uploaded. If no large request appears, the file stayed on your computer.
Test 2: Go offline
Load the site, then switch off Wi-Fi or unplug your network cable, and open a file. A tool that processes files in the browser can still read it. An upload converter will fail with an error. (Turn your connection back on afterwards.)
Also read the privacy policy
Look for the words "upload", "servers", "retain" or "deleted after". A clear policy will tell you whether files are sent anywhere and for how long they're kept. Ours says plainly that files "are never sent to our servers" (Privacy policy).
How does Free Pub Editor keep files private?
- Read on your device. The editor is a web page; when you open a .pub file, code in your browser reads it and builds the pages. The file isn't uploaded.
- Saved on your device. Autosave uses your browser's own storage. Clear this site's data in your browser settings to remove it.
- PDFs made by your browser. Export PDF uses your browser's print dialog, so the PDF is created locally.
- No account. There's no sign-up, so there's no profile of you or your files.
The site does use advertising on information pages, plus one small ad in the editor sidebar; the privacy policy explains the advertising cookies involved.
What else should I watch for?
- Converters that ask for an email address to send you the result. Your file and your address are now both on their system.
- Download-a-viewer sites offering a ".pub opener" program. Microsoft says there is no Publisher viewer (Microsoft Support), so treat unknown installers with care.
- Files from strangers. Any document can carry harmful content. Free Pub Editor doesn't run macros or code from a .pub file, but it's still wise to be cautious with unexpected attachments.
Ready to try it? See how to open a .pub file online, or for organisations choosing tools, our guide for schools, churches and clubs.