Verified no-login tool
Drop any file here or
Your files are secure
Inspect any file's true type, size and details — detected from the file's actual content, not just its extension.
Add your file — drag it into the tool or click Select File to browse.
The inspection runs instantly: type, size and key details appear.
Check the detected type — it's read from the file's signature, not the name.
Close the tab when done. The file was never uploaded.
Built for speed, privacy and reliability — on any device.
The file's signature is read from its content — a renamed file can't disguise itself.
Exact byte size in human-readable form, before you send or upload anything.
Inspection runs locally — the file never reaches a server.
Sanity-check attachments and downloads before opening them.
No account, no limits, nothing logged.
Add the file to the tool above. The type is detected from its internal signature and shown instantly — free, no account.
Extensions are just names — anyone can rename a file. The internal signature is harder to fake, which is why security-conscious checks read the content.
The detected type and size at minimum, plus other technical details the file exposes. The contents of documents aren't opened or displayed.
No. The inspection runs entirely in your browser, so the file never leaves your device.
The tool works in all modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari and Opera. We recommend keeping your browser up to date for the best experience.
File info checker — true type, size & details, free