Website analysis tool?

Is there any free online tools available for checking vulnerabilities of a website. My website is based on wordpress but is a custom built one. I am concerned about whether it is vulnerable to hackers. It will be great if any online tool can report the vulnerabilities of my website. Do anyone here have knowledge about this? Or should I consult with security professionals like https://nci.ca? Looking forward to get some advice.

 

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Hey, I think you should use this website checker tool. I've used it before for my blog, and it picked up a few vulnerbilities! Can also check how fast your site is running.