MBOX to CSV Converter - Parse Email Archives Online

Convert MBOX email archives to CSV format. Extract From, To, Subject, Date from Thunderbird, Apple Mail exports. Browser-based.

Drop MBOX file here or click to browse

.mbox, .mbx files

MBOX Input

CSV Output

Frequently Asked Questions

MBOX is a standard format for storing email messages. Multiple emails are concatenated in a single file, each starting with 'From ' line.

Thunderbird, Apple Mail, Eudora, and many Unix/Linux mail systems. Gmail takeout exports also use MBOX format.

From, To, Cc, Bcc, Subject, Date, Message-ID, and In-Reply-To. Additional headers can be added to the output.

By default, only headers are extracted. You can optionally include a preview of the body text (first N characters).

Attachment filenames are listed but not extracted. For full attachment extraction, use dedicated email tools.

MIME-encoded subjects (=?UTF-8?Q?...?=) are automatically decoded to readable text.

Yes. All parsing happens locally in your browser. Your emails never leave your device or get uploaded anywhere.

Install ImportExportTools NG addon, right-click folder, choose Export Folder > MBOX format.

Browser memory limits apply. For very large archives (100MB+), consider splitting or using command-line tools.

MBOX files are flat. Each folder exports as a separate .mbox file. Process each file separately.