OpenAnyFile
Works
Viewing, inspecting and verifying. You get a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis. File details, exact byte size and the detected signature are always shown.
How to open a .sldprt file
You have a SLDPRT file and nothing on your machine will touch it. Here is what the format actually is, and how to read one in about four seconds without installing anything.
What is a .sldprt file?
SolidWorks Part File is a binary & system format developed by Dassault Systemes, first appearing in 1995. It is normally produced by SolidWorks.
An OLE compound file holding the parametric feature tree, not just the finished shape. Compatibility runs one way only — a newer SolidWorks opens older parts, never the reverse.
| Full name | SolidWorks Part File |
|---|---|
| File category | Binary & system |
| MIME type | application/x-solidworks-part |
| Magic bytes (file signature) | D0 CF 11 E0 A1 B1 1A E1 |
| Developer | Dassault Systemes |
| Introduced | 1995 |
| Usually created by | SolidWorks |
| OpenAnyFile engine | universal hex inspector |
| Opens without upload | Yes — parsed locally in your browser |
Open a .sldprt file in your browser
OpenAnyFile routes .sldprt to its universal hex inspector, which inspects a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis.
- Open the OpenAnyFile opener in this browser — nothing to download or sign up for.
- Drag your .sldprt file onto the drop zone, click to browse for it, or paste it with Ctrl+V.
- The extension is detected and the file is handed to the universal hex inspector.
- Your SLDPRT opens on its own viewer page: a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis.
- Use fullscreen for a closer look, or download the file back out unchanged. Works the same on Windows, macOS, Linux, Android and iOS, because it is just a web page.
What you can and cannot do with it here
Does not work
Full-fidelity rendering. This extension has no standard structure, so you get a byte-level inspection rather than a rendered view.
Why your {ext} file is never uploaded
Most online viewers work by sending your file to their server, processing it there, and leaving a copy behind on infrastructure you do not control. OpenAnyFile does not. Your .sldprt file is read through the browser's local File API and decoded by JavaScript and WebAssembly running on your own machine. There is no upload step and no server-side copy — open your browser's network tab while you do it and watch: the file never appears.
Frequently asked questions about SLDPRT files
Can I open a .sldprt file without installing special software?
Yes. OpenAnyFile's universal hex inspector runs in your browser, so you can read a SLDPRT file with nothing installed. You get a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis. It will not replace the original application for editing, but it answers 'what is in this file' in seconds.
How can I check a file really is a SLDPRT file?
Look at the first bytes rather than the extension. A genuine SLDPRT begins with D0 CF 11 E0 A1 B1 1A E1. Opening the file in OpenAnyFile shows that signature in the file-details panel, so a file renamed to .sldprt by mistake is easy to spot.
Is it safe to open a SLDPRT file online?
With OpenAnyFile, yes, because nothing is uploaded. The file is read locally through your browser's File API and never leaves your device, so there is no server copy to leak, log or retain. That matters most for the kind of file people are least willing to hand to a random converter site.
What is a .sldprt file, exactly?
SolidWorks Part File — an application/x-solidworks-part format created by Dassault Systemes since 1995. An OLE compound file holding the parametric feature tree, not just the finished shape. Compatibility runs one way only — a newer SolidWorks opens older parts, never the reverse.
Does the same viewer handle formats related to SLDPRT?
Yes — the same engine also opens .dll, .doc, .exe, so you can compare related files without switching tools.
Related formats
These open with the same engine, so if you have one of these sitting next to your .sldprt file, it will open too: