Safe
Yes. Nothing to sign up for, nothing to install, nothing to pay: no account, no email, no card, no file to run, no player asking for a plug-in. The browser keeps three small things, your list, your country and your episode marks, and none of them leaves it. Posters come from the film database that supplies them; the only links that leave the site are the Watch now buttons, each naming the service it opens. "is 9anime safe" is asked because the copies paid for themselves with pop-ups and fake players; this site never asks you to install or pay for anything between a search and a title.
Legal
Reading about a series, following a cour and keeping a list is ordinary browsing, in every country the site covers. Viewing happens on the service you pick from the Watch now list, and that list is made of licensed services operating in the country you chose: the anime specialists, the global subscriptions and the free ad-supported tiers. Change the country and the list changes, because licences are sold country by country. That is what keeps viewing legal wherever you are.
How the site pays its way
Some services pay a small referral fee when Watch now sends a visitor who then subscribes, at the service's ordinary price. No premium tier, no membership, no locked pages.
Younger viewers
Every title page shows the genre chips and the synopsis before anything plays, and the age rating is enforced by the service you open. Adult productions are not listed on 9anime at all.
