The .dwl2 file extension is most commonly used by the AutoCAD computer aided drafting software. These files contain locked copies of AudoCAD DWG files. When a user opens a DWG file that is opened by another user, the DWL2 file is created to avoid accidentally modifications or deletions of file data.
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If you have additional information about the DWL2 file format or software that uses files with the DWL2 suffix, please do get in touch - we would love hearing from you.