File Type Checker
NetTool
Identify file type by its magic bytes (file signature). Works without relying on file extension.Updated 2026-03-20
Click or drag a file here to identify its type
Frequently Asked Questions
What are magic bytes?
The first few bytes of a file that identify its format, regardless of extension.
Why check file type?
File extensions can be changed. Magic bytes reveal the true file format.
Is this free?
Yes, completely free. Files are analyzed locally.
How to Use
- Review detailed results
- Copy data or export report
- Check status indicators
- Use troubleshooting tips
FAQ
How often should I check?
After DNS changes, wait 24-48h for propagation then verify. Monitor weekly for changes.
Is my query logged?
No. Queries processed in real time and not stored.
What protocols are checked?
Depends on the tool — DNS, HTTP, HTTPS, WHOIS, and other standard protocols.
How accurate are results?
Queries authoritative sources in real time. Results reflect current network state.
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