Convert MBox to XLS — Export Thunderbird Emails to Excel Spreadsheets

You need to analyze email data — count messages by sender, track response times, or build a report of all correspondence for a specific period. The data sits in Thunderbird as MBOX files, and there is no built-in export to spreadsheet. Total Thunderbird Converter reads your Thunderbird mailbox and exports emails to XLS files where each message becomes a row in an Excel spreadsheet. Here is what it does:

• Exports email metadata (sender, recipient, date, subject, CC, BCC) as spreadsheet columns
• Processes thousands of emails from multiple Thunderbird folders in one batch
• Creates one XLS file per folder or merges everything into a single spreadsheet
• Includes a command-line interface for scripted and scheduled exports
• Works offline — email data never leaves your PC
• 30-day free trial, no email or credit card required

Download Total Thunderbird Converter and turn your Thunderbird emails into Excel spreadsheets today.

 

MBox vs XLS: What Is the Difference?

MBox is a plain-text file format that stores email messages sequentially — each message starts with a "From " line, followed by headers and body text. Mozilla Thunderbird uses MBox as its default storage: one MBox file per mail folder (Inbox, Sent, Drafts). MBox files are not designed for data analysis, filtering, or reporting.

XLS is the binary spreadsheet format used by Microsoft Excel 97–2003 and readable by every modern spreadsheet application. XLS stores data in rows and columns with support for sorting, filtering, formulas, and pivot tables.

The conversion creates a structured table from unstructured email data. Each email becomes a row, and each email field (sender, date, subject, body) becomes a column. Once in XLS, you can sort emails by date, filter by sender, count messages per month, or build charts — tasks that are impossible inside Thunderbird.

How to Convert MBox to XLS

• Step 1. Launch Total Thunderbird Converter. The program detects your Thunderbird profile and shows all mail folders in a tree view.
• Step 2. Select the Thunderbird folders that contain emails you want to export. Use Check All to include every folder, or pick specific ones like Inbox or Sent.
• Step 3. Click XLS in the format toolbar at the top of the window.
• Step 4. Choose which email fields to export as spreadsheet columns: sender, recipient, date, subject, body text, CC, BCC, and attachment file names. Uncheck fields you do not need.
• Step 5. Set the destination folder for the output XLS files. Choose whether to create one file per Thunderbird folder or merge all emails into a single spreadsheet.
• Step 6. Click Start. The converter processes all selected emails and writes XLS files with one email per row. Column headers are generated from the selected field names.

Open the resulting XLS file in Excel, LibreOffice Calc, or Google Sheets. Apply filters, create pivot tables, or use formulas to analyze your email data.

Command-Line Conversion

Total Thunderbird Converter includes a command-line interface for automated exports:

ThunderbirdConverter.exe -sXLS "C:\Users\John\AppData\Roaming\Thunderbird\Profiles\abc123.default\Mail\Local Folders\Inbox" C:\Output\Inbox.xls

Additional flags control the output:

• -IncludeFields "From,To,Date,Subject" — select specific columns
• -MergeAll — combine all folders into one XLS file

Save the command in a .bat file and schedule it with Windows Task Scheduler to generate weekly or monthly email reports automatically.

Why Use Total Thunderbird Converter?

Direct Thunderbird access. The converter connects to your Thunderbird profile automatically. All mail folders appear in a tree view — no need to hunt for MBOX files on disk.

Selective field export. Choose exactly which email fields become spreadsheet columns. Include sender, recipient, date, subject, body, CC, BCC, and attachment names — or exclude what you do not need to keep the spreadsheet clean.

Batch processing. Export thousands of emails from multiple folders in one run. The converter handles mailboxes of any size without running out of memory.

Merge or split. Create one XLS file per Thunderbird folder, or merge all selected folders into a single spreadsheet for unified analysis.

No cloud upload. All processing happens on your PC. Client emails, internal correspondence, and confidential data never leave your machine.

Multiple output formats. Besides XLS, export Thunderbird emails to PDF, DOC, HTML, PST, TXT, or EML from the same tool.

Manual Methods vs Total Thunderbird Converter

Feature	Manual / Scripts	Total Thunderbird Converter
Setup time	Hours (write parser)	Minutes (install and run)
Field selection	Custom coding	Checkboxes in wizard
Batch conversion	Manual per folder	All folders at once
MIME decoding	You handle encoding	Automatic
Attachment listing	Complex parsing	Built-in column
Automation	Custom scripts	Command line + Task Scheduler
Cost	Free (your time)	One-time $49.90

Windows 7/8/10/11 • 30-day free trial

Download Now!

(includes 30 day FREE trial)

Buy License

(only $49.90)

Total Thunderbird Converter Customer Reviews 2026

Rate ItRated 4.7/5 based on customer reviews

"Our quarterly audit requires a spreadsheet of all client emails with dates, senders, and subjects. Before Total Thunderbird Converter, I was copying this data by hand from 3,000 emails. Now I export the entire quarter to XLS in two minutes. The field selection lets me exclude body text and keep only the metadata columns the auditors need."

Rachel Simmons Compliance Analyst

"I export my Sent folder to XLS every month to track how many proposals I sent and to which clients. Sorting by date and filtering by recipient in Excel takes seconds. The merge option is great because I can combine Inbox and Sent into one spreadsheet for a complete conversation log."

Tomasz Kowalski Sales Manager

"We receive study submissions via email and I need to catalog them in a spreadsheet for the review committee. The converter pulls sender, date, subject, and attachment names into clean columns. Only wish it could export directly to XLSX to avoid the 65,000 row limit, but splitting into multiple files works fine for now."

Priya Nair Research Coordinator

FAQ ▼