You can print 3D models through online services that ship finished parts to your door, at local libraries and makerspaces with printers available to the public, or by ordering through price-comparison platforms that find the cheapest option across dozens of vendors. The best choice depends on what you’re printing, how fast you need it, and how much you want to spend.
Online 3D Printing Services
Online services are the most straightforward option for most people. You upload a digital file, choose your material, and receive a finished part by mail. No equipment, no learning curve. Several companies dominate this space, each with a slightly different sweet spot:
- Xometry offers a broad material range and connects you to a global network of manufacturers. Their instant quoting tool lets you upload a file and see pricing immediately.
- Protolabs specializes in tight-tolerance polymer parts and consistent quality, making it a strong choice for functional prototypes that need to fit precisely.
- RapidDirect focuses on fast delivery and engineering-grade materials like nylon and metal.
- Sculpteo (now owned by BASF) caters to designers and small-batch custom parts, including full-color prints.
- Stratasys Direct handles production-quality and aerospace-grade plastics for projects where material performance really matters.
If you’ve heard of Shapeways, which was once the most popular consumer-facing service, be aware that the company went through bankruptcy in 2024. A new owner (Manuevo BV) has revived the Shapeways name and still offers printing services, but the old marketplace, user shops, and all previous account data were lost in the process. It’s operational again for custom orders, though not yet the full platform it once was.
Price Comparison Platforms
If you want the lowest price without checking each service individually, aggregator platforms do the shopping for you. Craftcloud is the most established option. You upload your model, pick a material, and the platform displays real-time quotes from manufacturers around the world. It factors in your location, so you can filter for the cheapest global price or the cheapest nearby manufacturer to cut shipping costs and delivery time. This is especially useful for simple prints where you care more about cost than about using a specific vendor.
Libraries and Makerspaces
Public libraries have quietly become one of the best places to print 3D models for free or nearly free. Many library systems now run maker labs with consumer-grade printers available to cardholders. Denver Public Library, for example, stocks Bambu Lab printers in its ideaLABs and provides PLA filament at no charge. You book a two-hour reservation (once per week), and staff help you prepare your file and get the print started. Hundreds of library systems across the country offer similar setups.
Makerspaces and hackerspaces are another local option, typically offering a wider range of equipment than libraries. These community workshops often have both basic and industrial-grade printers. Access usually requires a membership fee, but in return you get hands-on time with machines that would cost thousands to buy. To find one near you, search “makerspace” plus your city, or check directories like the Maker Map or Hackerspaces.org.
Universities also run 3D printing labs, though access is usually limited to enrolled students, faculty, and staff. Penn Libraries, for instance, offers free 3D printing to the Penn community through its Biotech Commons. If you’re a current student or alumni with library privileges, it’s worth checking whether your school has a similar program.
Choosing the Right Material
The material you pick affects cost, strength, appearance, and which services can fulfill your order. Here are the most common options:
PLA is the default for general-purpose prints. It’s cheap, biodegradable, prints easily, and comes in dozens of colors. Most library and makerspace printers use PLA. The tradeoff is that it’s not especially strong or heat-resistant, so it works best for display models, prototypes, and parts that won’t take a beating.
PETG is a step up in durability. It combines strength with some flexibility and resists moisture, making it a solid choice for functional parts that need to hold up over time.
Resin produces extremely high-resolution prints with smooth surfaces. It’s the go-to for miniatures, jewelry, dental models, and anything where fine detail matters more than size. Different resin types exist for different needs: tough, flexible, castable for metalworking, even biocompatible formulations for medical use.
Nylon (PA12) is an industrial-grade material known for strength, durability, and chemical resistance. It’s printed using a powder-based process called SLS, which doesn’t need support structures. This makes it ideal for complex mechanical parts, automotive components, and production-ready pieces. It costs significantly more than PLA or PETG.
What Drives the Cost
Pricing for 3D printing services can feel opaque, but a few factors account for most of the variation. Material is the most obvious: you’re paying per gram or milliliter, and denser or specialty materials cost more. But it’s not just the material in the finished part. Complex shapes generate more waste from support structures that get printed and then removed.
Print time is the second major factor. Thinner layers produce finer detail but take longer. Higher infill density (how solid the interior is) adds both material and time. A fully solid part can cost several times more than a hollow one with 20% infill, even at the same external dimensions. Organic, curved shapes with lots of overhangs also drive up cost because they need more support scaffolding and more post-processing cleanup like sanding and polishing.
For online services, shipping speed plays a role too. Rush orders with express shipping can easily double the total cost compared to standard timelines.
Typical Turnaround Times
How long you’ll wait depends heavily on the material and printing technology. Standard plastic parts (ABS, PLA) typically ship in 3 to 5 business days. Durable engineering materials like nylon or carbon-fiber-reinforced plastics take 6 to 7 business days. Resin-based processes (SLA) fall in the 3 to 7 day range, while powder-based nylon (SLS) runs 4 to 7 days.
Metal 3D printing is the slowest, averaging around 12 business days. Add a day or two to any of these if your parts need post-processing like gluing, painting, or polishing. Most services also offer expedited options at a premium. For local printing at a library or makerspace, you can often walk out with a small part the same day, though larger prints may need to be picked up later.
Preparing Your File
Nearly every printing service accepts STL files, which remain the universal standard. OBJ and 3MF files are also widely supported, with 3MF being the newer format that includes built-in compression and can store color and texture data. If you’re working with CAD files like STP or STEP, most services will accept them but convert to STL on their end.
Before uploading, it’s worth doing a few quick checks. Open your model in a free tool like Meshmixer, Blender, or Tinkercad to verify the dimensions are correct (scaling errors are one of the most common mistakes). If your file is large, you can reduce the triangle count using a “simplify” function without meaningfully changing the shape. And if your print has thin walls or tiny features, check the minimum wall thickness for your chosen material, since different processes have different limits for what they can reliably produce.