ADSKLIB File

What are ADSKLIB files and how to open them

Are you having problems opening an ADSKLIB file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your ADSKLIB files.

What is an ADSKLIB file?

An .ADSKLIB file is an Autodesk Material Library file.

Autodesk Material Library files store collections of material definitions used by Autodesk design and engineering applications for both visual appearance and physical behavior. Materials in these libraries combine appearance assets (like texture, color, finish) with physical properties (such as density, mechanical behavior, and simulated response). These libraries let users apply standard or custom materials to parts, surfaces, and assemblies for rendering, analysis, and design consistency across projects.

The .adsklib files are created by Autodesk programs such as Inventor, Revit, Fusion 360, and others that support material and appearance libraries. The built-in libraries and custom ones share the same format. Once a library is created or made active via the material or appearance browser, users can select materials from the .adsklib, copy or drag them into their project, modify them (when the library is writable), or export/import the entire library for sharing. These files are managed within Autodesk's project/data libraries system and may be locked (read-only) or unlocked for editing depending on how they are distributed or configured.

Internally, .adsklib files present a structured package similar to a ZIP archive. They begin with the ASCII signature PK (bytes 0x504B0304) at offset zero and contain compressed XML and binary files with names like RENDERMATERIALSCHEMA.XMLPK, INSTANCEPROPERTIES.BINPK, COMMONSCHEMA.XMLPK, ASSETTABLEOFCONTENTS.BINPK, and STREAMVERSIONTABLE.INFPK among others. These internal components include definitions of material schemas, asset instances, property tables, and metadata.

How to open ADSKLIB files

Important: Different programs may use files with the ADSKLIB file extension for different purposes, so unless you are sure which format your ADSKLIB file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: August 17, 2026

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about ADSKLIB file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.