Online Tool Store
File Type Spoofing Detector
Inspect file names, extensions, MIME hints, and magic-byte samples to flag files that may be pretending to be another type.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Heuristic only: inspect suspicious files with trusted security software before opening them.
How to use File Type Spoofing Detector
- Choose any local file to inspect its name, reported MIME type, size, and first bytes.
- The evidence board compares common magic-byte signatures with the filename extension.
- Refine the controls until the visible result matches what you need.
FAQ
Does this run entirely in my browser?
Yes. Inputs and previews stay on your device; this page makes no processing upload or backend request.
Can I start with the sample?
Yes. A realistic sample is visible immediately, and every control remains editable so you can replace it with your own input.
How should I use the result?
Treat the result as a practical planning or preview aid. Review important outputs for your own context before relying on them.
How we compare
| Capability | Online Tool Store | Extension checker | Antivirus suite |
|---|---|---|---|
| Extension, MIME, and magic-byte comparison | Included | Limited | Possible with setup |
| Local unrestricted file inspection | Included | Not typical | Varies |
| No account, install, or processing upload | Yes | Yes | Usually no |
Best for a quick, focused browser workflow with an editable sample and immediate local feedback. Choose a larger specialist application when you need advanced automation, collaboration, or production export.