File inspector

The real format of a file, its SHA-256 and MD5, a disguised file.

What it does

Tells what a file really is, on your device (nothing is sent): its format read from its first bytes, the app that opens it, and its fingerprints.

The real format doesn’t trust the name: a file without extension, or with a wrong one, is recognized from its content (images and RAW, video, sound, documents, archives, fonts, 3D, programs…).
Alerts: an extension that doesn’t match, a double extension like invoice.pdf.exe, a program or a script.
Fingerprints: SHA-256 and MD5, computed piece by piece (large files are fine). Paste the fingerprint given by a website to check your download is exactly the published file.
The first bytes in hexadecimal, for the curious.

Free, no account, nothing is sent: it runs in your browser, even offline.

Test pattern · Test patterns for your screens
3D viewer · Open glTF, FBX, OBJ, STL on your device: stats, export
Audio test · Check speakers: stereo, 5.1
Media info · Everything about a video, photo or sound file
Verify a copy · Compare a folder and its copy, byte by byte, and find duplicates
This device · Your IP, screen, browser and codecs
RAID calculator · Usable space and protection of your disks
Cables · HDMI, SDI, USB, Thunderbolt, XLR… speeds and plugs