What to Watch for When an Extension and Contents Differ
Key points
- Check the mismatch mark
- Check the sender
- Do not open it if safety is unclear
If Check a File's Real Type shows a mismatch, handle the file with care.
Steps
- Look for the "Mismatch" mark
- Check that the sender is trustworthy
- If the sender is unknown, do not open it
This tool cannot tell whether a file is dangerous.
Use "Check a File's Real Type (Extension vs Contents)" (free)
Tools that go well with this
- Check a File's Hash (SHA-256): Calculate a file's hash and compare it.
- Open a ZIP File (Unzip): See what is inside a ZIP and extract the files you need.
- Convert Text Encoding (Fix Garbled Text): Convert text files between Shift_JIS, UTF-8, EUC-JP and more to fix garbled text.