About STL Toolkit

STL Toolkit was created to simplify the 3D printing workflow. We noticed that many useful operations—viewing, measuring, repairing, converting—required desktop software, accounts, or subscriptions.

Our goal is to provide a complete set of browser-based tools that handle the most common STL file tasks. Everything runs locally in your browser, so your 3D models stay private and secure.

Whether you need to quickly inspect a model, fix a damaged file, convert between formats, or make basic edits, STL Toolkit gives you the tools without the friction.

STL Toolkit began as a side project by a team of 3D printing enthusiasts and web developers. We were frustrated by the lack of simple, free, browser-based tools for working with STL files.

Most existing solutions required downloading software, creating accounts, or paying subscriptions. We wanted something that just worked—open a file, do what you need, and move on.

Today, STL Toolkit serves thousands of users monthly, from hobbyists to professional designers, all who share our belief that basic 3D file operations should be simple and accessible.

Have questions, suggestions, or want to collaborate? We'd love to hear from you.

For general inquiries, support, or feedback, email us at support@stltoolkit.com.

We read every message and typically respond within 24 hours. For urgent issues, please include "URGENT" in your subject line.