SLDMAT Editor

A browser-based editor for SolidWorks material library files (.sldmat). No installation, no build step — use it online or download the HTML file and open it locally.

Usage

Open the editor for your SolidWorks version:

• SolidWorks 2025

If no version is specified, the latest supported version is selected automatically: open editor

To use offline, download sldmat-editor.html from this repo and open it in any modern browser — no server or internet connection required.

From the landing page:

• Import .sldmat — load an existing SolidWorks material library
• Create New — start a blank library from scratch

Features

Library management

• Add, rename, delete, and merge categories
• Add, rename, duplicate, and delete materials
• Drag and drop materials between categories
• Multi-select materials with Ctrl+click (toggle) or Shift+click (range), then bulk delete
• Search/filter materials across all categories

Material editing

• Edit name, description, and all physical properties inline
• Add or remove individual properties per material
• Unit conversion built into every numeric field — enter a value in MPa, GPa, psi, etc. and it converts automatically to SI on save
• Edit cross-hatch pattern and swatch color

File I/O

• Outputs valid .sldmat XML with UTF-16 LE encoding and BOM, matching the format SolidWorks expects
• Save — re-downloads using the original filename
• Save As — prompts for a new name
• Export — same as Save As for newly created libraries

Supported Properties