WordPress.org

1. Upload captcha-free.php to the /wp-content/plugins/ directory
2. Activate the plugin through the 'Plugins' menu in WordPress
3. That's it! WP Captcha-Free will start blocking automated comment spam behind the scenes

Note: If your WordPress theme doesn't have the comment_form hook, enter the following code right before the closing </form> tag in the comments.php file of the theme.

<?php do_action('comment_form', $post->ID); ?>