Valve Steam data
File type: Various data file
A .last file is an internal data file used by Valve Steam.
It stores data used by the Steam client rather than a document intended for direct editing.
File type category:
Various data file
Date updated: October 28, 2026
Valve Steam is a digital distribution and game-management service from Valve that enables users to manage and download games. Its client uses .last files as auxiliary data files while managing Steam data.
The files are part of Steam's internal data and are not normally intended to be opened or edited independently. Steam is available for Microsoft Windows, Apple macOS and Linux.
A .last file should normally be handled by Steam. Open Steam on Windows, macOS or Linux and allow the client to read the file in its existing location; opening it directly is usually not useful.
There is no standard conversion for a .last file. It is an internal Steam data file, not an interchange or user-document format, so it should be left in place for Steam to manage.
Software apps that create last files:
Software applications that handle other tasks involving last files:
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