Univik Online File Viewers

Free Online File ViewersOpen email, mailbox and document files in your web browser, with no software to install

Pick the app, device or file type you have from the 18 viewers below. Each one opens in your browser, so you can read a file on any computer without buying or installing a program.

18 ViewersNo InstallNo Sign-UpFree

 Email App Viewers

Email App Viewers

Desktop mail programs. Point the viewer at the file and read the messages in your browser.

Thunderbird Open Mozilla Thunderbird mail in your browser.
SeaMonkey View SeaMonkey email without the app.
Eudora Read old Eudora mailboxes online.
Postbox Open Postbox email files in a browser.
Opera Mail View Opera Mail messages online.
Entourage Open Microsoft Entourage mail files.
Apple Mail Read Apple Mail messages on any PC.

 Webmail and Cloud Viewers

Webmail and Cloud Viewers

Mail exported from web and cloud accounts. Open the download and browse it safely.

Gmail View exported Gmail mail in your browser.
Proton Mail Open Proton Mail export files online.
Google Groups Read Google Groups exports online.
Google Vault Open Google Vault export files.

 Device and Platform Viewers

Device and Platform Viewers

Mail from phones and other systems. View it on any computer with a browser.

Android View phone mail backups on any PC.
iPhone Open iPhone mail files in a browser.
Chromebook View mail files on a Chromebook.
Linux Open mailbox files on Linux, no install.

 File and Document Viewers

File and Document Viewers

Mailbox and document files by extension. Open the file type you have in one click.

MBOX Open .mbox mailbox files in your browser.
OneNote View OneNote pages without OneNote.
Publisher Open Publisher .pub files in a browser.

No viewer matches that. Try an app name like Gmail, or a file type like MBOX.

 Why Use Them

Why an Online File Viewer Helps

Nothing to Install

No download and no setup. A viewer opens in the browser you already have, on any computer.

No Account Needed

There is no sign-up and no email to hand over. Open the page and read your file right away.

Made for Reading

Each viewer is tuned for one kind of file, so your messages and pages show the way they should.

 Questions

Online File Viewer Questions

An online file viewer is a web page that opens a file so you can read it, without any program to install. You pick your app or file type, load the file and view the contents in your browser on any computer.

No. Every viewer here opens in your web browser. There is no software to download and no sign-up of any kind, so a viewer works the same on Windows, Mac, Linux and a Chromebook.

Yes. All the online viewers on this page are free to open and read your files. You only need a web browser and the file you want to view.

This page links viewers grouped into four kinds. You get desktop mail apps like Thunderbird and Apple Mail, webmail exports like Gmail and Proton Mail, phone and platform backups, plus file types like MBOX, OneNote and Publisher. Pick the card that matches what you have.

Yes. The device viewers open mail backups from an Android phone or iPhone, and the viewers run on a Chromebook or Linux PC too, since everything happens in the browser.

A viewer only reads a file. To turn the file into PST, PDF or another format, use a Univik converter instead. Links to the converters are at the bottom of this page.