Mbox Viewer

An online tool for developers and IT professionals to quickly view and analyze MBOX mailbox files without local setup.

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Om dette værktøj

This tool opens and analyzes MBOX mailbox archives in a privacy-preserving, browser-based environment. It reads the MBOX stream and identifies messages, presenting a navigable list with key metadata. It does not modify the source files and operates entirely on the client side.\n\nConceptually, it treats the MBOX as a sequence of messages. For each message, it parses RFC 5322 headers, decodes MIME parts, and attaches attachments with metadata. The result is a structured, queryable view that supports quick inspection and validation.\n\nWho benefits? Developers integrating mail data workflows, IT admins validating archives, QA engineers testing email processing pipelines, and data scientists performing mailbox analytics. The tool’s value lies in streaming parsing, local processing, and straightforward exports without requiring a mail server.\n\nCore features and use cases include: file upload, a message list with summary lines, per-message header and body viewing, MIME decoding, attachment listing, and optional JSON export for automation. Typical tasks: mailbox migration checks, data validation, and forensic data collection from archives.

Sådan bruges

  1. Provide inputs: Upload an .mbox file or paste content.
  2. Run parsing: The tool streams the MBOX and builds a message index.
  3. Review outputs: Select a message to view headers, body, and attachments.
  4. Apply filters: Use date, sender, or subject filters to narrow the list.
  5. Export results: Download JSON or text for downstream processing.
How to use mbox viewer online

Frequently Asked Questions

Find hurtige svar

What is an MBOX file and what can I view with this tool?
An MBOX file is a concatenation of emails stored in a single text file; the tool lets you view message-level metadata, full headers, decoded bodies, and a list of attachments without sending or exporting emails.
Can I export results to JSON or text?
Yes. The tool provides JSON export for downstream processing and a plain text export of selected messages. Exports preserve message metadata, headers, bodies, and attachment metadata to support integration with pipelines and audits.
Will the tool preserve the original order of messages?
Yes. Messages appear in their original MBOX order by default; filters or sorts do not reorder the underlying archive, only the displayed subset. This ensures audit trails and data integrity for investigations.
Are attachments decoded and accessible?
Attachments are decoded when MIME parts are present and can be listed with filename, content type, and size. They are not automatically downloaded; you can choose to export or view attachment metadata and decoded content as needed.

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