Is there a completely free AI generator?

Could you elaborate on the existence of a truly "free" AI generator? Is there a service that offers AI generation capabilities without any cost to the user, either upfront or through hidden fees? Are there any limitations or caveats that users should be aware of when considering such a tool? Does the quality of the generated AI output suffer in comparison to paid options? And, finally, how can users ensure they are not compromising their data privacy or security when utilizing a seemingly "free" AI generator? I'm interested in understanding the nuances and potential pitfalls of utilizing such a tool.