Is Arweave free to use?

Could you please clarify for me if Arweave is available for use without any cost? I've been hearing a lot about its unique features and I'm quite interested in exploring its capabilities. However, before I proceed, I would like to ensure that it doesn't involve any financial commitment. So, is Arweave indeed free to use, or are there any associated fees that I should be aware of? I would greatly appreciate it if you could provide some clarity on this matter. Thank you for your time and assistance.