At One Place

.tmp files

.tmp file
Temporary File
Working scratch data a program left behind, usually safe to delete.

What opens a .tmp file

Windows
Usually safe to delete, Notepad (built in — to check if it is text)
macOS
Usually safe to delete, TextEdit (built in — to check)
Linux
Usually safe to delete, file (to identify it)

What a .tmp file is

Applications write .tmp files while saving, printing or installing, and normally delete them when finished; the ones that survive are leftovers from a crash or a forced quit. They are not meant to be opened and rarely contain anything recoverable, though Office temp files beginning with ~$ occasionally hold an unsaved draft. Windows Disk Cleanup and Storage Sense remove them safely once the program that made them has closed.

Details

Extension
.tmp
Full name
Temporary File
Category
Data
Created by
Various
Format
Binary

Common questions

How do I open a .tmp file?
On Windows use Usually safe to delete; on macOS use Usually safe to delete; on Linux use Usually safe to delete. Working scratch data a program left behind, usually safe to delete.
What is a .tmp file?
Temporary File. Applications write .tmp files while saving, printing or installing, and normally delete them when finished; the ones that survive are leftovers from a crash or a forced quit. They are not meant to be opened and rarely contain anything recoverable, though Office temp files beginning with ~$ occasionally hold an unsaved draft.

Related pages

Sources

  1. Media Types Registry — IANA
  2. Official vendor product documentation — At One Place

How these figures are compiled and checked