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Free Plugin by jotis v2.1.0

Blue Captcha

Blue Captcha is a powerful and highly customized WordPress plugin that effectively protects your WP blogs from spammers and unwanted persons.

Blue Captcha

The facts

Rating
4.7★ from 15
Active installs
400+
Price
Free
Last updated
17 Aug 2026
Added
Mar 2012
Requires WP
4.9
Tested up to
WP 7.0.4
Requires PHP
7.0
Downloads
37,842

Our analysis

AI-assisted

Blue Captcha is a WordPress plugin designed to protect blogs from spam and unwanted users. It can be applied to various forms, including login, registration, comments, and password recovery, with customizable CAPTCHA settings. The plugin is suitable for users looking to enhance their site's security against spam.

Best for: This plugin is best for WordPress site owners who want to reduce spam and enhance user registration security.

What it does well

  • Customizable CAPTCHA settings with 7 difficulty levels
  • Supports multiple forms including login and registration
  • Can log user activities and track spammers
  • Offers translation support in multiple languages
  • Allows for extensive CAPTCHA customizations

Where it falls short

  • Limited information on specific performance metrics
  • No details on user support or documentation

Verdict

Blue Captcha offers a range of features for CAPTCHA customization and spam protection. It may be a useful tool for those prioritising security on their WordPress sites.

From the developer

jotis's own description of Blue Captcha, lightly tidied.

Blue Captcha is a powerful and highly customized WordPress plugin that effectively protects your WP blogs from spammers and unwanted persons. It is easily installed and provides high protection against spammers, bots or unwanted persons.

Do you like Blue Captcha? Then Support it!

If you like Blue Captcha, then you can help it grow by donating one dollar. Any donation will be highly appreciated and will help in further development of this plugin.

Features:

  • It can be applied to any of the following : login form, registration form, commentary form or password recovery form
  • It’s highly customized
  • It has 7 predefined CAPTCHA difficulty levels to choose from – of course, you can adjust your CAPTCHA settings and create a custom level
  • The possible CAPTCHA customizations are more than enough
  • It can apply the same or totally different CAPTCHA settings on login form, registration form, commentary form and password recovery form
  • It can display CAPTCHA to only non-registered users or registered users
  • It can preview CAPTCHA image before applying it
  • It supports 5 different fonts and 30 different background images
  • It supports single or double CAPTCHA layer
  • It can display up to 20(!) characters on Captcha Images
  • It is capable of adding extra drawing (lines, circles, grid, transparent lines) on CAPTCHA image
  • It is capable of keeping log file which registers all activities concerning user logins, user registrations, user comments and password recovery
  • It has “Hall of Shame” (HoS)
  • It provides blocking options as well
  • It can export the entire log file or HoS into CSV file (Excel)
  • With the help of log file and HoS, it’s easy to track down the IP address of spammers or unwanted persons and ban them for ever

You can visit Blue Captcha Page for more information.

Blue Captcha Translation

Blue Captcha is now available in Greek, Spanish, Russian, Italian, Brazilian Portuguese, Serbo-Croatian, Slovenian and Arabic.

I would be very grateful if someone is willing to translate Blue Captcha to another language.
For those interested, the template translation file (“blue-captcha.pot”) is located on “languages” folder of blue-captcha plugin.

Contribution

Special Thanks To The Following Contributors:

Leon Roskar (http://www.qb.si) => Slovenian Translation
Borisa Djuraskovic (http://www.webhostinghub.com) => Serbo-Croatian Translation
João Victor T. Magalhães => Brazilian Portuguese Translation
Ericka Morales Hernández (http://todoriesgo.net) => Italian Translation
Alex Balashov => Russian Translation
Andrew Kurtis (http://www.webhostinghub.com) => Spanish Translation
Christos Bakopoulos => Arabic Translation

Read the full description on the official page →

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