.LBRN File Extension
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What is an LBRN file?
An LBRN file contains a project created by LightBurn, a program used to create and edit designs that can be cut with a laser cutter. It stores information in XML format about the design, which includes images imported into the project, along with settings for the cuts to make the design.
You most likely will only encounter LBRN files if you create or work with designs that are cut or engraved in materials with a laser cutter. The LBRN files allow users to save designs created in LightBurn, close them, then reopen them for further editing.
To create and save an LBRN file in LightBurn, select File → New, create the design, then select File → Save or Save As. To open an LBRN file in LightBurn, select File → Open.