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Univik Online DBX Viewer
100% private. Runs only on your device
A DBX reader that runs in your browser. Open old DBX files such as Inbox.dbx without installing the legacy Outlook Express email client.
Or pick one from your device. Your mail is read on the machine in front of you, and the file itself never leaves it.
Old mail is personal. Most sites that offer to open DBX file data copy it to a server first. This page works in your browser instead. It reads the index, the list of messages Outlook Express kept inside the file, straight off your disk.
Nothing is sent anywhere and no account is needed. Load this page, disconnect from the internet and the DBX reader still works. That matters for client mail and for evidence.
Microsoft stopped shipping Outlook Express after Windows XP, so a modern PC has nothing that opens these files. This page reads them anyway, without converting them first. It is light-weight, so it loads on an old laptop or a slow connection.
Deleting a message in Outlook Express only removed it from the list. The message itself stayed in the file until Outlook Express next tidied that folder. A deep scan looks for those leftover messages and shows what it finds.
Short answer: any current browser can open DBX file data here. Chrome, Edge, Safari and Firefox all work, on a desktop or a phone. There is no install step and no import step.
Double click a .dbx file on Windows 10 or Windows 11 and you get the "How do you want to open this file?" box. Nothing on the computer reads the format. Use Edge or Chrome here instead.
Apple Mail has no DBX import, and nearly every desktop tool for the format is Windows only. Safari or Chrome on macOS opens the file here, attachments included.
Any distribution with Firefox or Chromium will read it. Useful when an old backup drive is mounted read only and you need to see what is on it.
ChromeOS cannot run a Windows DBX reader, so a school or work Chromebook normally leaves you stuck. Pick the file from Files or Drive and it opens here.
Put the file in the Files app, then load this page in Safari and tap Choose. Useful when a relative sends you an old mailbox and you are away from your computer.
Chrome, Samsung Internet and Firefox can all reach Downloads or Drive. A phone has less memory than a computer, so a very large mailbox scrolls better on a desktop.
The tool can read DBX files properly, rather than guessing at the text inside. It reads the index in the file header, then follows each message through the 512 byte blocks it was stored in. The parts of the message are put back together the way Outlook Express did it.
Inbox.dbx, Sent Items.dbx, Drafts.dbx, Deleted Items.dbx and any folder you made yourself. Versions 5.0, 5.5 and 6.0 are covered, and a file copied out of a backup on its own opens like any other.
Point the tool at a folder and every .dbx inside opens together, listed down the left. Open Folders.dbx and you get the folder tree Outlook Express kept, including folders whose own file was never made.
Formatted mail appears with its pictures where the sender put them, and a second tab shows the same message as plain text. Pictures stored on a website are not loaded until you ask for them, so an old newsletter cannot record that you opened it.
PDF, Office, image and zip files save in full, with names in any language. Photos show as thumbnails before you save them. Older mail sometimes carried a file inside the message body rather than attached, and those are pulled out too.
The MIME encodings old mail used are all handled, base64, quoted printable, 8bit, uuencode and even UTF-7 from the dial up years. UTF-8, Windows-125x, ISO-8859, KOI8, Shift JIS, GBK, Big5 and EUC-KR. Subjects in Hindi, Arabic, Russian, Chinese, Japanese or Korean read correctly. If an old mailbox used a character set of its own, you can pick that character set by hand.
A half copied file, a damaged message list or a mailbox Outlook Express refused to open will usually still show its mail. So will an orphan file, meaning one .dbx on its own with no folder around it. Your file is only read, never changed.
Message-ID, the Received chain and X-Mailer are shown exactly as they were sent, with the values Outlook Express kept in its index below them.
A DBX file can reach two gigabytes. The tool reads the index rather than loading the mailbox into memory, then pulls each message off the disk when you click it. A very large mailbox takes a little longer to list, because its index is spread through the file.
Drag your .dbx file into the box near the top of this page, or use the Choose button. If you kept the whole Outlook Express mail folder, open the folder instead.
The list fills as the index is read. Search by sender or subject, then click any message to see it, with its attachments listed beside it.
Switch tabs for plain text or internet headers. Save an attachment to your device, or run the deep scan when messages are missing from the list.
Most people meet a DBX file years after the computer that wrote it was replaced. These are the usual places to find one.
Every folder was its own file under C:\Documents and Settings\[user]\Local Settings\Application Data\Identities\{GUID}\Microsoft\Outlook Express. Copy that folder to a modern machine and open it here.
DBX files are often found inside old backups, external drives and disk images. The file is opened for reading only, so the original is never changed.
Windows Mail and Windows Live Mail could import Outlook Express, but the import often stopped part way and left some files unread. Open them here to see what was missed.
Folders.dbx, Offline.dbx and Pop3uidl.dbx hold settings and lists, not mail. Open Folders.dbx here and it names the folders it points at, newsgroup folders included, so you know what else to look for.
If a file lost its .dbx name at some point, pick it anyway. The tool checks the marker inside the file, not the name.
Reading and converting are different jobs. Read your mail here, and use the Univik DBX Converter when it has to be saved as PDF, PST, EML or MBOX.
| What you need | This page | Univik DBX Converter |
|---|---|---|
| Install needed | None, opens in the browser | Windows setup |
| Runs on | Any computer, tablet or phone with a browser | Windows 7 to 11 |
| Files uploaded | None at all | None, the work happens on your PC |
| Read messages and attachments | Yes | Yes |
| Save as PDF, PST, EML, MBOX and more | Not here | 25+ output formats |
| Whole folder at once | Read a folder of files | Convert a folder in one run |
| Deleted and orphaned mail | Deep scan rebuilds them | Yes |
| Search | Sender, subject and recipient | Full text of the message |
| Price | Free | Free trial, paid licence |
Straight answers about opening Outlook Express mail without Outlook Express.
No. Everything needed to read the file is already in this page, so your browser opens the DBX file from your own disk and builds the message list itself. No server sees it, and the page keeps working once you disconnect from the internet. Anything a message would load from a website is left out until you press Show remote images.
Drop the .dbx file into the box at the top of this page and it opens without installing the legacy Outlook Express email client. Outlook Express stopped shipping with Windows after XP. A current PC has nothing that reads the format, and Outlook cannot import a loose .dbx file either. Click a message to read it, then use the tabs for plain text, internet headers and attachments.
No. There is no message cap, no file size cap and no sign up, which is where most free DBX readers stop you. Opening several files together, previewing attachments and saving them are all included. Converting mail into another format is the paid tool.
Outlook Express 5.0, 5.5 and 6.0 all wrote the same .dbx format, so all three open here. Outlook Express 4 is different, using .mbx and .idx files, and the tool says so plainly rather than showing you nonsense.
On Windows XP they are kept in the identity folder at C:\Documents and Settings\[user]\Local Settings\Application Data\Identities\{GUID}\Microsoft\Outlook Express. That path is hidden, so turn on hidden files first. Copy the whole folder to a USB drive and open it here.
Because it holds no mail. Folders.dbx is the master index telling Outlook Express which file belongs to which folder. The tool recognises it and lists the folders it names, so you know to open Inbox.dbx or Sent Items.dbx instead.
Often, yes. Deleting a message removed it from the list but left the message itself in the file, until Outlook Express next tidied that folder up. Click Look for deleted mail in the left pane and the tool searches the file, puts each message it finds back together and lists them. Recovered mail is marked, so you can tell it apart from the rest.
Yes. Subjects are decoded, and message text in Windows-125x, ISO-8859, KOI8, Shift JIS, GBK, Big5, EUC-KR, UTF-7 and UTF-8 is converted for display. Outlook Express sometimes wrote subjects in the local character set without recording which one, so the left pane lets you pick it by hand when a subject comes out as symbols.
Yes to both. The tool reads the index rather than loading the whole mailbox into memory, then pulls each message off the disk as you click it, so even a two gigabyte mailbox opens. If the index is damaged it says what it could not read, lists what survived and offers the deep scan for the rest.
No install, no sign up and no upload. Your old mailbox opens on the device you are reading this on.
Choose a .dbx fileBuilt by Univik, making file and email tools since 2013. This reader was written from the published Outlook Express format notes, then checked message by message against real Outlook Express 6 mailboxes and against UnDBX, an independent open source tool. Damaged files were tested on purpose. Reviewed August 2026.