Upload your mysterious .DAT files and discover what's inside.
No registration required • 100% client-side • Privacy-first
or click to browse files
Automatically identifies if your file is CSV, binary, plain text, or unknown format using advanced pattern recognition.
Preview your file content with proper formatting, table view for CSV files, and smart encoding detection.
Examine binary data with hex dump view, detect file encoding, and analyze internal structure patterns.
WhatsInDat can analyze various .DAT file formats
Spreadsheet data with any delimiter
Log files, configuration files
Images, executables, databases
We'll help you figure it out!
Everything you need to know about analyzing DAT files
Yes! All file processing happens entirely in your browser. Your files never leave your device or get uploaded to our servers.
You can analyze files up to 100MB. For larger files, the tool will analyze a sample portion to maintain performance.
We can identify CSV data, plain text, binary files, images, archives, and many other common formats within DAT files.
No installation required! WhatsInDat works directly in your web browser on any device - desktop, tablet, or mobile.
Currently, you can analyze one file at a time. Simply use the 'Analyze New File' button to switch between different files.
If we can't identify the exact format, we'll show you a hex dump and basic file information to help you investigate further.
Join thousands of users who trust WhatsInDat for instant, secure file analysis.
🔒 Private • ⚡ Fast • 🆓 Free