Tools
The desk's working tools. The file checker hashes on your own device — the file never leaves your browser — and the quiz and checklist ask for nothing.
Check a Suspicious File
Select one file — or drop it onto the checker. Your browser calculates its SHA-256 fingerprint here, in small pieces so even a large file won't freeze the tab, then checks only that fingerprint against MalwareBazaar’s database of known malware. Already have a hash? Paste it below instead.
Your file is never uploaded. Only its SHA-256 hash is sent to MalwareBazaar.
Hashing… 0%
Important: a 'not found' result does NOT prove a file is safe. MalwareBazaar only contains known malware samples — new, rare, or modified malware will not appear. Treat any unexpected file as suspicious, even if it is not listed.
Already have the hash? Paste it instead:
This checks one file against known malware. It is not a full computer scan — no website can scan your whole machine.
Would you catch the phish?
Read the situation, make the call, then see the signal that matters. No email address or score is collected.
Spot the Phish — 5-Second Email Checklist
The five red flags to check before you trust an email — free one-page PDF from our first briefing.
Want the warnings before the next one lands in your inbox? Get the Field Briefing — free, plain-English breach alerts the day they land.