.tmp — Temporary File
A file created temporarily by an application, often as a working copy or partial download. Usually safe to delete once the creating app has closed, but the internal format varies by app.
Also known as: .temp
A generic or catch-all format. What it can actually do depends entirely on the application that created it — treat it with the same caution as any file from an untrusted source.
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Frequently asked questions
What is a .tmp file?
A file created temporarily by an application, often as a working copy or partial download. Usually safe to delete once the creating app has closed, but the internal format varies by app.
Can I edit a .tmp file?
Not directly as text — .tmp is a runnable or packaged format, not one meant for manual editing.
Does having a .tmp extension mean the file is safe?
No single extension can guarantee that. A generic or catch-all format. What it can actually do depends entirely on the application that created it — treat it with the same caution as any file from an untrusted source. Always consider where the file came from, not just its name.