Terms of Service

Last updated: October 31, 2026 · Version 1.0

This is a translation of the Portuguese version. If there is any conflict, the Portuguese version prevails, except where the mandatory law of your country requires otherwise.

Current status: payments, subscriptions and paid credits are not yet active on STLzilla. The rules about them below apply once billing is enabled; until then, nothing is charged.

1. Who we are and acceptance

STLzilla (stlzilla.com) is a platform of 3D printable models, offering ready-made files and parametric models you can customize in the browser (Studio). The service is provided by Gustavo Zenedin Cruz, a Brazilian sole proprietorship registered under CNPJ 41.116.858/0001-01, based in R. Pres. Carlos Cavalcanti, 970 – São Francisco, Curitiba, PR 80510-040, Brazil (“STLzilla”, “we”).

By creating an account, customizing, downloading or buying on STLzilla, you agree to these Terms, the Privacy Policy, the Model Licenses and the Refunds and Cancellation Policy. If you do not agree, do not use the service.

2. Eligibility and accounts

• Accounts and purchases are only for people aged 18 or older with full legal capacity.
• One account per person. In Brazil, the account may be linked to the CPF to prevent duplicates and to issue tax documents.
• You are responsible for keeping your password secret and for all activity on your account. Tell us immediately about any unauthorized use.
• Your account information must be accurate and kept up to date.

3. The service

• Studio generates files from the parameters you choose. The preview is illustrative: check size, scale and orientation in your slicer before printing.
• The file contains the part geometry. The physical result depends on your printer, material, calibration and print settings, which are outside our control.
• Printing recommendations and tested-printer badges are guidance, not a guarantee of results.
• We may change, add or remove models and features. Past purchases remain available under “My downloads” as described in section 5.

4. Credits, subscriptions and payments

• Prices, credits per plan, rollover limits and the cost of each model are shown on the pricing page and on the model before you buy or download.
• Credits are a usage unit inside STLzilla. They are not currency, earn no interest and cannot be exchanged for cash, transferred or sold.
• Subscription credits renew every billing cycle. Unused credits roll over up to the plan limit; the excess expires at renewal. If you cancel, the current cycle’s credits remain valid until the end of the paid period.
• Credit packs are valid for 12 months from purchase.
• Courtesy credits (for example, at sign-up or from coupons) have no monetary value and may have their own expiry.
• Credits are only charged when the file is ready to download. Downloading the same model with the same parameters again within 24 hours is free.
• Payments are processed by Stripe. STLzilla does not receive or store your full card details.
• Subscriptions renew automatically until you cancel. You may cancel at any time, without penalty, from your account.
• Prices may change. Changes to active subscriptions will be notified by email at least 30 days in advance and apply from the next cycle.

5. Licenses and downloads

Each download grants a personal or commercial license, as described in the Model Licenses. The license type is recorded in your history. You can download purchased files again from “My downloads” while your account is active.

6. Intellectual property

The models, parametric source code, images, photos, text, brand and software of STLzilla belong to Gustavo Zenedin Cruz or its licensors and are protected by copyright, trademark law and international treaties. These Terms do not transfer any ownership to you.

Unless we authorize it in writing, you may not:

• share, sell, give away, sublicense or publish the digital files (STL, 3MF, SCAD or others), including on repositories such as Printables, MakerWorld, Thingiverse, Cults3D, groups or social networks;
• use the website’s photos and images to promote or sell parts;
• copy the catalog, scrape data, reverse engineer or try to obtain the models’ source code;
• use STLzilla files, code or content to train or feed artificial intelligence systems;
• use the STLzilla brand in a way that suggests partnership or endorsement.

7. Content you upload

When you upload text, images or logos to customize a model, you confirm that you hold the necessary rights and that they do not infringe third-party rights (such as trademarks, characters or people’s likeness). You grant us only the permission needed to process that content and generate your file. We do not use it for any other purpose.

8. Prohibited conduct

• Creating more than one account to obtain courtesy credits or bypass limits.
• Using the service to generate illegal, offensive or discriminatory content, or content that infringes third-party rights.
• Generating parts intended for weapons, weapon components or devices prohibited by law.
• Overloading or attacking the system, trying to access restricted areas or circumventing technical and usage limits.
• Filing an unjustified chargeback without contacting support first.

9. Use of printed parts

Parts are produced by you, with your own equipment. Assess whether a part is suitable for its intended use. Do not use printed parts for safety-critical, medical, structural or load-bearing applications, or in contact with food or small children, without proper testing and materials.

10. Liability

We work to keep the service available and the files correct, but the service may be interrupted for maintenance or third-party failures. If a paid file is defective, we will fix it, regenerate it or return the credits used.

To the maximum extent permitted by applicable law, we are not liable for indirect damages, lost profits or losses arising from printing, assembling or using the parts. Nothing in these Terms limits rights that mandatory consumer law grants you.

11. Suspension and termination

You may close your account at any time. We may suspend or close accounts that breach these Terms, with notice where possible. A chargeback suspends the account until it is resolved. Unused credits on accounts closed for breach are not refunded, unless the law requires it.

12. Changes

We may update these Terms. The version and date are shown at the top of this page. Material changes will be announced by email or on the website with reasonable notice; continuing to use the service after the effective date means you accept them.

13. Governing law and jurisdiction

These Terms are governed by the laws of the Federative Republic of Brazil. Consumers resident in Brazil may bring claims in the courts of their domicile. For other users, the courts of Curitiba, Paraná, Brazil, have jurisdiction, without prejudice to the mandatory consumer protection rules of the user’s country of residence.

14. Contact

Gustavo Zenedin Cruz, a Brazilian sole proprietorship registered under CNPJ 41.116.858/0001-01, based in R. Pres. Carlos Cavalcanti, 970 – São Francisco, Curitiba, PR 80510-040, Brazil. Email: guto@stlzilla.com. We reply within 5 business days.