What Katharina is
A browser extension that acts on web pages on your instruction. You direct it; it does what you ask, within the limits described in the panel and on this site.
Sites you automate
Some websites restrict or prohibit automated interaction in their own terms of service. Katharina keeps you in the loop — anything that submits or sends stops and asks you first — but you are responsible for how you use it and for respecting the terms of the sites you use it on.
Katharina will not solve, bypass or repeatedly retry a captcha, a login wall or any other security check. When it meets one, it stops and asks you.
Credits and payment
Credits are spent when Katharina calls an AI model on your behalf. Replaying a saved job, continuing a paused run and exporting results do not use credits.
Monthly credits do not carry over to the next period. Credits you buy as a top-up do not expire. Subscriptions renew until cancelled; cancelling takes effect at the end of the paid period, and you keep access until then.
What the AI produces
AI models make mistakes. Check anything that matters before acting on it. Katharina’s approval gates exist so a mistake stops in front of you rather than after the fact, but they cannot make an answer correct.
Acceptable use
Do not use Katharina to collect personal data unlawfully, to send unsolicited messages at scale, to impersonate anyone, or to circumvent access controls. We can suspend an account that does.
Availability and changes
We may change or discontinue features. If we make a change that materially reduces what a paid plan provides, you may cancel and we will refund the unused part of the period.
The service is provided as is, without warranty, to the extent the law allows.