Convert Thunderbird to Text — Export Emails as Plain Text (TXT) Files

Need a lightweight copy of your Thunderbird emails without HTML formatting, embedded images, or proprietary file structures? Total Thunderbird Converter exports your Thunderbird mailbox to plain text files — compact, searchable, and readable on any operating system. The converter:

Saves each email as a separate .txt file or merges all messages into one file
Lets you choose which fields to include: sender, date, subject, body, CC, BCC
Processes entire folders in batch — thousands of emails in one session
Names output files by date, sender, or subject for easy sorting
Includes a 30-day free trial with no limitations

Download Total Thunderbird Converter and start exporting your emails to plain text today.

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(includes 30 day FREE trial)

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(only $49.90)

Quick answer: To convert Thunderbird to plain text, launch Total Thunderbird Converter so it detects your profile, select the mail folders, click the TXT button, pick a destination folder, choose which fields and whether to merge or split, then press Start. It strips HTML and MIME encoding into compact, searchable .txt files in one offline batch, with a free 30-day trial.

MBOX vs Plain Text: What Is the Difference?

MBOX is Thunderbird's storage format. It packs multiple emails into a single binary file, complete with MIME headers, HTML bodies, Base64-encoded attachments, and transport metadata. An MBOX file is designed for email clients, not for human reading. Opening one in Notepad gives you a wall of encoded data mixed with message boundaries.

Plain text (TXT) is the simplest document format. A .txt file contains only human-readable characters — no markup, no formatting, no binary data. Text files open instantly in Notepad, VS Code, terminal editors, or any text viewer on Windows, macOS, and Linux.

Converting Thunderbird to text strips away HTML tags, MIME encoding, and email transport headers, leaving you with clean message content: who sent it, when, the subject line, and the body. The result is compact, universally readable, and easy to search with standard tools like grep or Windows Search.

How to Convert Thunderbird to Text

Step 1. Launch Total Thunderbird Converter. The program detects your Thunderbird profile and displays all mail folders in a tree view.
Step 2. Select the folders you want to export. Use Check All to process the entire mailbox, or pick specific folders.
Step 3. Click the TXT button in the format toolbar at the top of the window.
Step 4. Choose a destination folder for the output text files.
Step 5. Configure the output: select which email fields to include (sender, date, subject, body, CC, BCC), set the file-naming template, and decide whether to save each email as a separate file or merge all into one.
Step 6. Press Start. The converter extracts the text content from each email and saves it to the destination folder.

The output files contain clean, readable text. Attachments are saved separately to the same or a different folder — they are not embedded in the text output.

Command-Line Conversion

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

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

Combine this with Windows Task Scheduler to run nightly exports or process multiple Thunderbird profiles in a .bat script.

Why Use Total Thunderbird Converter?

Selective field export. Choose exactly which email fields appear in the output: sender, recipient, date, subject, body, CC, BCC, or any combination. Skip unnecessary headers to keep the text clean and focused.

Merge or split. Save each email as a separate .txt file for individual access, or merge an entire folder into one long text file — useful for full-text search across thousands of messages.

Customizable file naming. Name output files using date, sender, subject, or message index. A template like [Date]-[Subject].txt produces filenames that sort chronologically and are easy to find.

Batch processing. Export thousands of emails in one session. The converter handles large Thunderbird mailboxes without running out of memory.

Attachment handling. Attachments are saved to a separate folder alongside the text output. Documents, images, and archives remain intact and accessible.

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

Online Tools vs Total Thunderbird Converter

Feature	Manual Copy-Paste	Total Thunderbird Converter
Batch export	One email at a time	Entire folders at once
Field selection	Copy everything or nothing	Choose specific fields
File naming	Manual	Automatic template
Merge option	Manual concatenation	Built-in merge to one file
Speed (10,000 emails)	Days of copy-paste	Under 5 minutes
Automation	Not possible	Command-line support
Pricing	Free but impractical	One-time $49.90

Windows 7/8/10/11 • 30-day free trial

When Do You Need Thunderbird to Text Conversion?

There are several scenarios where exporting Thunderbird emails as plain text is the right choice:

Lightweight archiving. Text files are tiny compared to HTML-formatted emails. A 5 GB Thunderbird mailbox may shrink to a few hundred megabytes of plain text, making long-term storage on external drives or NAS more practical.
Full-text search. Merged text files can be indexed by Windows Search, Everything, or grep-based tools. Searching across years of correspondence takes milliseconds instead of waiting for Thunderbird to load.
Data extraction. Researchers and analysts export email bodies to text for processing with Python, R, or other data tools. Plain text is the simplest input format for text mining, sentiment analysis, or keyword extraction.
Cross-platform access. Text files open on any device — Windows, macOS, Linux, Android, iOS — without installing any email client. Share a .txt file and anyone can read it.
Compliance logging. Some regulated industries require email records in a non-proprietary format. Plain text with sender, date, and subject fields satisfies most audit requirements without vendor lock-in.

Download Now!

(includes 30 day FREE trial)

Buy License

(only $49.90)

Thunderbird to Text Conversion: FAQ

What exactly gets saved when I convert Thunderbird to text?

The converter extracts the human-readable content from each email: sender, recipient, date, subject, and body text. HTML formatting, embedded images, and MIME encoding are stripped. You control which fields appear in the output through the settings panel.

Can I merge all emails into a single text file?

Yes. Total Thunderbird Converter can save each email as a separate .txt file or merge an entire folder into one long text file. The merged mode is useful for full-text search across thousands of messages.

What happens to attachments during text conversion?

Attachments are saved separately to the same folder or a subfolder alongside the text output. They are not embedded in the .txt files, since plain text cannot contain binary data. Documents, images, and archives remain intact and accessible.

Can I export only specific fields (e.g., sender and subject)?

Yes. The settings panel lets you check or uncheck individual email fields: sender, recipient, date, subject, body, CC, BCC, and more. Only the selected fields appear in the output text files.

How large are the output text files compared to the original mailbox?

Plain text files are significantly smaller than HTML-formatted emails. A Thunderbird mailbox with 10,000 messages that takes up several gigabytes typically produces a few hundred megabytes of text output, since HTML tags, inline images, and MIME encoding are removed.

Is the conversion free?

Total Thunderbird Converter includes a 30-day free trial with no limitations. After the trial, a personal license costs $49.90 — a one-time purchase, no subscription.

Can I automate text export via command line?

Yes. Total Thunderbird Converter includes a command-line interface. You can schedule nightly exports with Windows Task Scheduler or process multiple Thunderbird profiles in a .bat script without any GUI interaction.