Technical File Specifications
| Format Specification | DAT & Winmail.dat File (.dat) |
|---|---|
| MIME Type | application/ms-tnef |
| Signature (Magic Bytes) | 78 9F 3E 22 (TNEF 0x223E9F78) |
| File Integrity | SHA-256 Verified Clean & Malware-Free |
| Native Browser Extractor | Online DAT Extractor → |
Why Developers & QA Engineers Need Sample DAT & Winmail.dat File Files
Testing file upload components, backend validation scripts, and file parsing algorithms requires consistent, standardized test fixtures. Using production files often risks leaking confidential enterprise data or customer records. This sample .dat file is completely synthetic, safe for CI/CD test pipelines, and free from restrictive licensing.
Test and Extract In Your Browser
Don't have desktop extraction software installed? EasyExtract allows you to parse, inspect, and extract this file directly inside your browser. No files are ever uploaded to remote cloud servers—all parsing occurs 100% locally in your device's memory using WebAssembly.
Frequently Asked Questions
What is a sample DAT file?
A sample DAT file is a standardized binary test container (commonly an Outlook TNEF winmail.dat file) used by developers to test email parsers, attachment extractors, and MIME gateways.
How do I view this sample DAT file without Microsoft Outlook?
Click the '⚡ Test & Extract Online' button to open and extract all embedded files, body text, and metadata using EasyExtract's in-browser DAT Extractor.
Does this sample DAT file contain sensitive data?
No. All EasyExtract sample files are synthetically generated, 100% clean of private records, and include verified cryptographic SHA-256 hashes for integrity auditing.