WordPress is a free web software used to create WordPress blogs or websites. An everyday lot of WordPress websites are created for various purposes. Same like, more than 30,000 WP sites are getting hacked every day. There are so many hackers available to hack the websites for spreading malware, advertising and stealing the contents. To avoid hacking, injecting malware and brute-force attack, install any of the following top 5 best free WordPress security plugins to your WordPress website.
See Also: Basic tips to Secure your WordPress blog
Wordfence is the #1 WordPress security plugin which has a lot of features to protect the website from various attacks.
iThemes Security is the leading security plugin which has a lot of features same like Wordfence.
All In One WP Security & Firewall is a popular security plugin which has options to prevent back-end as well as the front-end.
There are another two popular security plugins BulletProof Security and Sucuri Security which has very little features comparable to above plugins. All the above plugins are designed to protect your WordPress site. But I would recommend to use both Wordfence and iThemes security plugins. Do not use more than two security plugins which might slow down your website.