TNEF Viewer

A comprehensive, read-only parser for TNEF (winmail.dat) files used in Microsoft Exchange and Outlook ecosystems. It accepts binary uploads and returns a structured view of embedded messages, attachments, and formatting without requiring an email client.
Conceptually, the tool decodes the TNEF envelope, enumerates records (MSG blocks, attachment streams), and exposes a normalized data model including headers, plain or HTML bodies, attachment metadata, and raw payloads for downstream processing.
Beneficiaries include IT admins, security analysts, and developers who need rapid access to embedded content for troubleshooting, preservation, and audits. Unique value lies in non-destructive parsing, high-volume readiness, API-backed batch processing, and export-ready structures that integrate with data pipelines and SIEMs.
Core features include file upload, automatic format detection, robust error reporting for corrupted blocks, and optional deep extraction of common embedded messages. Export options cover JSON for automation and CSV for human-readable reports, with preserved binary streams for attachments and embedded items.