Stephen Harrison 🗓️ Updated ⏱️ — 📝 —


LNK File Safe to Open? A Simple Safety Checklist for Windows Shortcuts

If you have downloaded a file that ends in .lnk and you wonder whether it is safe to open, you are right to pause. A Windows shortcut file can look harmless, but it can also be used to launch hidden commands, scripts, or a website that tries to steal your details. On LNK File Safe to Open, you learn what an LNK file really is, the common warning signs to look for, and the safest steps to take before you click anything.

Use the checklist below to decide whether to delete it, scan it, or inspect it safely without putting your device or accounts at risk.


LNK File Safe to Open (File Type Risk Checker)

Type an extension to begin

Unsure about a download? Enter the file extension (like .pdf or .exe) and you’ll get clear, practical guidance on the safest way to open it. No uploads and no file content scanning. This checker only uses what you type.

Check a file extension

Tip: If you only see a filename like invoice (no .something), that’s a red flag. Turn on “show file extensions” first.

Enter letters/numbers only (a dot is optional). Example: pdf or .pdf

Quick examples:

Browse common extensions (search + A–Z)

Loading extension library…

File Type Risk Checker FAQ

Does this tool upload my file anywhere?

No. This tool only checks the file extension you type. It does not upload your file, read your file contents, or scan your downloads.

Is a file extension enough to know if it is safe?

No. The extension is a useful clue, but safety depends on the download source and what the file really contains. A harmless-looking extension can still be used in a scam.

What if the filename has multiple dots, like invoice.pdf.exe?

Always trust the last extension. In the example, the real type is .exe, which is an executable. This is a common trick used in phishing.

What if the file has no extension at all?

Treat it as suspicious until proven otherwise. Turn on “show file extensions” in your file manager, then check the full filename again. If it is still missing, do not open it unless you trust the source.

Why are .lnk, .iso, and .docm flagged as higher risk?
  • .lnk shortcuts can launch hidden commands or scripts.
  • .iso disk images can hide multiple files, including installers.
  • .docm documents can contain macros that run code if enabled.
Are files like .csv, .txt, and .jpg always safe?

They are usually lower risk, but not always safe. Scammers can use them to deliver misleading instructions, links, or QR codes. Treat unexpected files with caution.

What are the safest first steps for any unknown download?
  • Do not open it if you were not expecting it.
  • Verify the sender or website using a separate message or call.
  • Scan it with your antivirus before opening.
  • Check properties and digital signature where available.
  • Open in read-only or a safer viewer if you only need to view it.
What should I do if I am still unsure?

Do not open it. If it relates to an account, payment, or work request, contact the organisation directly using a trusted phone number or website. If you need help identifying the type, try the related tool: What opens a file extension?

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