The Best 10 Websites for Free STL Files

STL files are a type of file for 3D models used by those looking to print miniatures or other 3D prints. These files are compact and easy to transfer, so they can be shared and sold around the web.

Many different websites offer STL files for consumers, and many of these websites provide these files for free. Today we will look at the best websites to offer free STL files and what makes each stand out.

Why Do You Need STL Files?

STL files were created to be used in scale model prototyping. Companies would use STL files to quickly print out a new part or product in development and do quick testing for obvious design flaws.

While STL files are still used for this prototyping, consumers buy and sell them all over the internet. With the growth of 3D modeling and the accessibility of 3D printers, STL files are now a typical purchase for 3D print enthusiasts. They provide consumers with 3D printer models to print without having to design them independently, which streamlines the printing process and how consumers exchange models.

Things To Consider When Printing With STL Files

Now that you understand why you would want an STL file for printing, we can look into some other aspects to consider during the printing process.

Size

The biggest element to consider when printing with an STL file is the size. Different prints come in different sizes, and it is important to ensure that your print is the size you desire. 3D printing takes a long time, so reprinting after several hours for a different size is a huge hassle. Residential 3D printers are only so big, so certain prints are too large to print at home.

Material

The 3D printing material you choose to print a model in will determine how that model holds. Some prints require a particular material because the model’s shape needs a specific strength to hold correctly. Beyond structural stability, the material changes the feel and flexibility of your print, from moldable rubber-like resins to rigid polycarbonate.

Thickness

Another essential aspect is the thickness of the print. Strong, thick walls keep the mold stable, while an incredibly thin, hollow print will be brittle. On the other hand, thick prints require more material, longer print time, and higher cost. Finding a thickness that supports your model without bankrupting you is essential.

Resolution

The last significant aspect is resolution, which refers to the detail given to additive layers on the print. Higher resolution uses extra-thin layers to pile on fine detail, but as with thicker walls, it results in a longer print time.

10 Best Websites To Download Free STL Files

Now that you understand the importance of STL files and things to look out for, we can explore some of the best websites to download these files for free, and what advantages certain websites boast over their competitors.

Frequently Asked Questions

We’ve talked about the best websites to download free STL files, but you may still have some unanswered questions about the topic. Below we have taken some of the most frequently asked questions and explored them further.

Is 3D printing a cheap hobby?

No 3D printing enthusiast would tell you the hobby is easy on the wallet, but it is not as expensive as many think. 3D printers are becoming cheaper and more accessible than ever, and a decent consumer 3D printer can be purchased for as low as $300. After you own a working printer, the only significant expense is the cost of materials and any files you pay for.

What can I use instead of STL files?

STL files may be the industry standard, but they are not the only printable 3D model files on the market. Similar file types include the well-known OBJ or the more obscure PLY files. These file types may differ in print quality or compatibility, but they all function similarly.

Is 3D printing unhealthy?

The action of 3D printing is not inherently unhealthy, but there are some potential risks. Printing can involve risky materials, so use gloves when handling chemicals or metal solvents, and wear an appropriate mask to guard against poor air quality. As with many electronics, printers also carry a risk of fire, static, and burns, so keep them on non-flammable surfaces and follow the manual.

Are all Thingiverse files free?

Yes, all files listed on Thingiverse are offered for free. The company that runs the website, MakerBot Industries, makes most of its money from its 3D printer lines, so all files provided through their website are free and easy to download.

In The End

All in all, there are many different websites for printing enthusiasts to find free STL files. While not all websites offer the same extensive catalog of 3D models, each item on today’s list includes a unique set of 3D models. Whether you enjoy the complex landscape of tabletop wargames or need a part for research, there is a free STL website for your needs. If you or someone you know is interested in getting started, check out one of our top 3D printers, and browse our favorite things to 3D print for inspiration.