NI offers Multisim Live, a free, web-based circuit simulator.

While the allure of a free activation code might be tempting, the risks far outweigh any benefits. Purchasing Multisim 14.3 through official channels not only ensures you receive a legitimate copy of the software but also provides access to customer support, updates, and peace of mind regarding security and legality.

: No installation or activation code required; you just need an NI user account.

The ecosystem of "software cracking" sites is a primary vector for malware distribution.