Acutis Virus / malware check by file hash — no upload
Pick a file and your browser computes its fingerprint locally. Then look that fingerprint up against the malware databases — without ever uploading the file.
Fingerprint
Check this fingerprint
What this does — and doesn't. This checks whether a file is already known to antivirus vendors by its unique fingerprint (hash). It does not upload your file and it is not a live sandbox scan. A "not found" result means the file is simply unknown to these databases — that is not the same as safe. A brand-new or targeted piece of malware will have a fingerprint nobody has seen yet.
How fingerprint checking works
Every file has a hash — a short string that changes completely if even one byte changes. Antivirus vendors and researchers record the hashes of malware they've seen. If your file's hash matches a known-bad one, it's almost certainly that same malware. The beauty: you only need to share the hash, not the file, so nothing private leaves your machine. Need to generate hashes for other reasons? Use the hash generator.
FAQ
Does this upload my file to scan it?
No. Your browser computes the file's SHA-256 and MD5 fingerprint locally; only that short hash is sent when you click a lookup button. The file itself never leaves your machine.
What does the lookup actually check?
It looks the fingerprint up against malware databases (VirusTotal, MalwareBazaar and a Google search) to see whether that exact file is already known to antivirus vendors. It is not a live sandbox scan.
What does a "not found" result mean?
It means the file is simply unknown to those databases, which is not the same as safe. Brand-new or targeted malware has a fingerprint nobody has catalogued yet.
Is this free and private?
Yes. It's free, needs no sign-up, and the hashing runs entirely in your browser. The file is never uploaded and nothing is stored.
A clean hash isn't a clean machine.
Hash lookups only catch malware someone's already cataloged. Acutis Go watches your actual computer and connection in real time and tells you plainly whether a problem is your machine, your network, or the internet — in 60 seconds. Free.
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