But the cracks came with hidden costs. In 2021, Autodesk had already begun embedding cloud-based license verification and telemetry into InfraWorks. Cracked versions frequently suffered from missing collaboration tools, inability to sync with Autodesk Drive, and unpredictable crashes. More dangerously, malware disguised as InfraWorks cracks—ransomware, crypto miners, or credential stealers—surged in underground forums. One 2021 report by Cybereason noted that “software cracks” were a top-5 vector for initial access breaches in small construction firms. Thus, the “free download” often cost far more than the subscription price.

Create or sign in to your Autodesk account and verify your eligibility with your educational institution.

While there is no "free" version for general users, you can legally download and use Autodesk InfraWorks 2021 for free through specific Autodesk programs 1. For Students and Educators

. While newer versions like InfraWorks 2025 are now standard, Autodesk typically allows subscribers to access the three most recent previous versions through their account management portal. How to Access the 2021 Version