Univik BAT Converter for Windows
At a Glance
Key Features
Finds Your Mail Files for You
Point it at your The Bat! mail folder and it lists every mailbox inside. No hunting through folders for messages.tbb files one by one.
At a Glance
Univik The Bat! Email Converter at a Glance
The essentials in one quick look: what it reads, what it writes and what it costs.
2
File Types Read
Handles .tbb mailboxes and .tbk backups, the two files The Bat! keeps your mail in.
6
Output Formats
PST for Outlook, plus EML, MSG, MBOX, PDF and HTML for everything else.
0
Emails Uploaded
The whole job runs on your own PC, so private mail stays private.
1
Run per Archive
One batch covers every mailbox from every account inside your mail folder.
$29
Starting Price
A free trial first. Licences start at $29 and carry a 30-day guarantee.
Key Features
What Univik The Bat! Email Converter Does
The tool is built so a converted mail archive stays complete and easy to use.
Folder Layout Kept
Inbox, Sent, Trash and the folders you made yourself come out in the same order, so the converted archive reads like your old mailbox.
Attachments Travel Along
Photos, documents and every other attachment stay inside their emails. From, To, date and subject lines stay correct too.
Preview, Search and Pick
A built-in preview shows every email before you convert. Search by a word, a sender or a subject and tick only the mailboxes you need.
Reads Backups Directly
A .tbk backup opens as it is. You never need to reinstall The Bat! or run a restore that might come back empty.
Originals Never Touched
The converter reads your files and writes new ones beside them. Your The Bat! mail stays exactly as it was and cannot be harmed.
The Short Version
Why Your The Bat! Emails Are Stuck
The Bat! saves your mail in its own file format. Two things keep those emails locked in.
Trap 1: A Format Only The Bat! Reads
A .tbb mailbox will not open in Outlook, in a browser or anywhere else. On a computer without The Bat!, double-clicking the file gets you nowhere.
Trap 2: A Fiddly Built-In Export
The Bat! can export messages, but it works one folder at a time and never produces a PST file for Outlook. For a full archive it becomes a long, technical chore.
The Way Out: Read the Files Directly
Univik The Bat! Email Converter reads the mail files directly and writes formats everyday apps open. The TBB converter tool takes mailboxes one by one, opens .tbk backups on its own and works through a whole mail folder in order. You never install The Bat! at any step.
Three Extensions
Three ExtensionsThe Files The Bat! Keeps Your Mail In
A quick guide to which file is which and how the tool treats each one.
.tbb
A Mailbox Folder
Each mail folder, like your Inbox, is stored as one messages.tbb file holding its emails and attachments. This is the main file the converter reads.
.tbk
A Backup Package
The file The Bat! makes when you back up your mail from its menu. The converter opens the backup directly and converts the emails packed inside.
.tbn
A Small Index File
Sits next to each .tbb file and helps The Bat! find messages quickly. Your emails are not in it, so the converter works fine even if it is missing.
Three Steps
Three StepsHow to Batch Convert The Bat! Emails
The tool needs no The Bat!, no sign-in and no folder-by-folder exporting.
1
Add The Bat! Files
Load .tbb or .tbk files, or point the tool at your mail folder so it finds every mailbox for you.
2
Pick the Output Format
Choose PST for Outlook, EML or MSG for other mail apps, MBOX for Thunderbird or PDF for records.
3
Convert and Open Your Emails
Run the batch and open the results in Outlook or any app you like, folders and attachments included.
Download the Free Trial
Runs on Windows 11 and 10 · no The Bat! or Outlook needed · nothing uploaded · help comes straight from the developers
Real Situations
Real SituationsWhen You Need a The Bat! Email Converter
Most people come looking for a The Bat converter for one of these three reasons.
Switching to Outlook
A new job, a new PC or a company rule moves you to Outlook. Convert your mailboxes to PST once and years of emails follow you there, folders and all.
An Old Backup You Cannot Open
A The Bat backup file (.tbk) sits on a drive from an old computer, and a restore in The Bat! shows nothing. The converter reads the backup file itself and gets the emails out.
Keeping Emails as Records
Some emails need to be saved for good: receipts, contracts, family letters. PDF copies open on any device and print cleanly, years from now.
Finding Your Files
Where Your The Bat! Emails Live on Disk
Good to know
The Bat! keeps your mail on your own computer. Unless you picked a different spot when you installed it, everything sits under AppData\Roaming\The Bat! in your user folder, with one folder per email account and a messages.tbb file inside each mail folder.
Backups made from The Bat!'s own Backup menu are .tbk files, saved wherever you chose at the time. Copy these files from an old drive to any Windows PC and the converter reads them there. The old computer does not need to work anymore.
Compare Your Options
Three Ways to Get Emails out of The Bat!
Each route gets you part of the way. Only one is built for the whole job.
| What you need | The Bat!'s Own Export | Free Online Uploaders | Univik ConverterTRIAL |
|---|---|---|---|
| Works without The Bat! installed | No | Yes | Yes |
| Makes PST files for Outlook | Never | Rarely | Yes |
| Whole archive in one run | Folder by folder | File by file | One batch |
| Reads .tbk backup files | Restore only | Almost never | Yes |
| Emails stay on your PC | Yes | Sent to a server | Yes |
Personal email does not belong in a public upload box. Converting at home keeps it yours.
What You Need
Univik The Bat! Converter System Requirements
Operating System
A 64-bit PC running Windows 11 or Windows 10. The needed .NET Framework 4.8 is already part of updated Windows.
The Bat! Not Required
The software reads .tbb and .tbk files on its own. No The Bat!, Outlook or email account sign-in is involved.
Memory and Disk
Normal mailboxes convert fine with 4 GB RAM. Give big attachment-heavy archives 8 GB.
Works Fully Offline
Internet is only needed to download the installer. The conversion itself runs on air-gapped machines too.
| Software Information | Univik The Bat! Email Converter |
| Version | 6.8 (Latest) |
| Licence | Trial at no cost, licences from $29 |
| Platform | Windows 11 and 10, 64-bit editions |
| Framework | .NET Framework 4.8 or newer |
| Reads | .tbb mailbox files and .tbk backup files |
| Writes | PST, EML, MSG, MBOX, PDF and HTML |
Questions
The Bat! Email Conversion Questions
Use Univik The Bat! Email Converter. A .tbb file is a mailbox from The Bat! email program and normal apps cannot read it. The converter software opens the file on Windows and turns your emails into PST, EML, PDF or other everyday formats.
Yes. A .tbk file is a backup that The Bat! creates of your mail. The tool reads the backup directly and converts the emails inside. You do not need to install The Bat! or run a restore, which also helps when a restore comes back empty.
Convert your .tbb or .tbk files to PST format with the converter. A PST file is Outlook's own mailbox format. Open Outlook, import the PST and your emails, folders and attachments appear there the way you had them. The PST file opens in new and older Outlook editions alike.
By default under C:\Users\your name\AppData\Roaming\The Bat! in the Mail folder, with one folder per email account. Each mail folder holds a messages.tbb file. If you picked a different mail folder when you installed The Bat!, your files are at that spot instead.
No. Emails are personal, so everything happens on your own Windows PC. Nothing is sent to any server and the converter works with no internet connection. It also suits offices where uploading mail is not allowed.
The .tbn file is a small index that The Bat! keeps beside each mailbox so it can find messages quickly. Your actual emails live in the .tbb file. The converter reads the .tbb directly, so a missing or damaged .tbn is not a problem.
Yes. Attachments stay inside the converted emails and your folder layout is kept, so Inbox, Sent and the folders you made yourself come out in the same order they had in The Bat!.
Yes. It reads mailbox files from old and current releases of The Bat!, including files saved years ago on another computer. You do not need to update anything first.
You need none of them to convert. The software reads The Bat! files on its own. Outlook is only needed later if you want to open a converted PST file there.
A .tbb file is one mailbox folder's messages, like your Inbox. A .tbk file is a backup package of your mail that The Bat! makes from its Backup menu. The converter reads both, so it does not matter which one you have.
More Tools
More Univik Email Converters
MBOX Converter
Turn MBOX mailbox files from many mail apps into PST, PDF and other formats.
MBOX Converter »Thunderbird Converter
Move Thunderbird emails to Outlook and everyday formats with folders intact.
Thunderbird Converter »EML Converter
Convert single .eml email files in bulk, attachments and details included.
EML Converter »Who Wrote This Page
Fact Checked
This page comes from the Univik team, which has been making email and file conversion software since 2013. The facts on this page about The Bat! by Ritlabs, its .tbb mailbox files, .tbk backups and the default mail folder location, are checked against Ritlabs documentation and public references.
Since 2013Sources VerifiedUnivik Team