Adobe Photoshop Lightroom file
File type: Various data file
A .lrtoolkit file is an internal data file used by Adobe Photoshop Lightroom, Adobe's photo management and editing software.
It belongs to Lightroom and is not normally created or edited manually by users.
File type category:
Various data file
Date updated: September 28, 2026
The LRTOOLKIT file extension is associated with Adobe Photoshop Lightroom. An LRTOOLKIT file contains internal data that Lightroom uses while providing its photo management and editing functions.
The file is part of Lightroom's own supporting data rather than a photo, catalog, or general-purpose document. Lightroom manages the file and its contents, so users should not edit or rename it unless instructed by Adobe support.
Adobe Photoshop Lightroom supports LRTOOLKIT files on Microsoft Windows and Apple macOS. The format is intended for use by Lightroom and is not designed as a user-facing interchange format.
Open a .lrtoolkit file with Adobe Photoshop Lightroom on Microsoft Windows or with Adobe Photoshop Lightroom for Mac on Apple macOS. In normal use, Lightroom opens and manages this type of file automatically.
There is usually no reason to open an LRTOOLKIT file directly. If Lightroom does not recognize it, avoid editing the file and check that it is in the location expected by the application.
An LRTOOLKIT file is an internal Lightroom data file, not a document or image intended for conversion. No general-purpose conversion to another format is normally available.
Keep the file with the Lightroom data that uses it. When moving or exporting Lightroom content, use the relevant features in Adobe Photoshop Lightroom rather than attempting to convert the LRTOOLKIT file itself.
Software applications that handle other tasks involving lrtoolkit files:
Microsoft Windows
Apple macOS / Mac OS X
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