Is it safe to delete a .temp file?

Yes, once the program that made it is closed. Only keep it if it holds unsaved work you want to recover.

Why do .temp files keep appearing?

Apps create them constantly while working and usually auto-delete them. Leftovers mean a program closed unexpectedly.

A .temp file will not delete — why?

It is still in use. Close the app that created it or reboot, then delete it.

What Is a .TEMP File?

Q: How do I open a .temp file?

Try a plain-text editor first. If it is binary, rename it to the likely real extension and open it with the matching app.

You found a .temp file and are not sure if you need it. It is a leftover working file. Here is what made it and whether you can delete it.

What a .temp file is

A .temp file is a temporary file an application creates while it works — to hold data it is still writing, an in-progress copy, or a scratch buffer. The app normally deletes it when it finishes, but a crash, a forced quit, or a lost connection can leave one behind.

Why you have one

Installers, Office apps, editors, and browsers all write .temp files. Seeing one usually means the program that made it did not close cleanly, so it never cleaned up after itself.

How to open a .temp file

A .temp file has no fixed format — it is whatever the app was writing. If it holds text, open it in a plain-text editor (Notepad, TextEdit, VS Code) to see if there is anything worth keeping. If it is binary, rename it to the likely real extension (for example .docx or .jpg) and try the matching program.

Is it safe to delete?

Almost always yes. Close the program that may have created it, then delete the .temp file. The only reason to keep one is if it contains work an app crashed before saving — check its contents first.

How to handle a .temp file by OS

Windows: most live in %TEMP% (C:\Users\You\AppData\Local\Temp). Use Disk Cleanup or delete them manually when no app is running.

macOS / Linux: temporary files sit in /tmp or an app's cache folder and are cleared on reboot; you can remove stray ones by hand.

Common problems

If a .temp file will not delete, the program that owns it is still running — quit it (or reboot) and try again.