This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.



Input your own message as challenge text. It uses encrypted text and paired with matching web fonts so user will see clearly the challenge text. Great Captcha user experience.

Customizable Captcha challenge text.

You can input your own keywords as Captcha challenge text. For example, you can go to Admin, input ‘World Peace’ and select 50%; input ‘omg super cool msg’ and select 40%. When users visit your pages with Boomcaptcha the ‘World Peace’ will be display 50% of the time and user will type ‘World Peace’ 50% of the time. It is the same for ‘Omg cool msg’; except it is displayed 40% of the time and 10% will be random characters. Your visitors will be impressed with your ‘message’ since they will type it, it’s better than keyword or banner advertisement.

Captcha analytics

You can check how many times the Captcha and your keywords being displayed.

Renew your encryption kits

Boomcaptcha uses encryption kits to prevent spammer from hacking so we suggest renew the encryption kits from time to time. You can get the new encryption kits in
You can use Boomcaptcha with various forms, like:

  • Comment forms

Please register in to renew the Captcha encryption kits often.
If you have any suggestions regarding the plugin please email us support@boomcaptcha


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  • Download the Boomcaptcha plugin and unzip it
  • Use automatic Plugins installation, Add New menu in WordPress,
  • upload the Boomcaptcha folder to the /wp-content/plugins/ directory.

Activate the plugin through the Plugins menu in WordPress

Automatic updates the same as other plugins. Click on “Upgrade Automatically” if prompted from the admin menu.


How does Boomcaptcha work?

Boomcaptcha use the patent pending technology that use encrypted web fonts. The fonts for the challenge text are encrypted, the characters mapping to the encoding are shuffled. For example, вАШAвАЩ glyph is no longer at the location of ASCII 65, instead it is assigned in random location. The challenge text encoding will then be set accordingly, so human will still see the desired вАШAвАЩ and enter вАШAвАЩ, while the spam/bots will see the random encoding and enter the wrong answer.

Why is Boomcaptcha so much easier to enter the right Captcha challenge?

Boomcaptcha uses real fonts to display the challenge text so it is scalable and easy to read. When user types the text they will see the same font so it is very easy to match. It is also great for iPhone, iPad and other mobile devices since it is resolution independent, you can zoom in as much as you like and the text will maintain sharp.

How can I have user type my customized messages?

You can easily set your customized messages as challenge text in WordPress Boomcaptcha Admin and set the % it should show up. For example, you can set вАШMy great messageвАЩ as challenge text and select 50% then вАШMy great messageвАЩ will show up 50% of the time as the Captcha challenge text. You can set multiple customized challenge text and respective % with Professional version.

How secure is Boomcaptcha?

With the patent pending technology Boomcaptcha is much more secured than regular Captcha. The Captcha fonts typefaces variations are endless, making it very difficult for spam/bot programs to use OCR (Optical Characters Recognition) to recognize and the font encryption are changed in real time. The encryption combinations of a font are also limitless, making it difficult to guess the right encodings. We are constantly refreshing the Captcha fonts and encryptions to make it even more secured.

Why should I refresh the encryption kits and how can I refresh my encryption kits?

To keep the spammers at bay it is suggested to refresh the encryption kits from time to time. The Free version has only 10 encryption kits and it needs refresh more frequent. Professional versions have 1000 encryption kits and it needs refresh less.

You can login into your account and click on вАШDownload Encryption kitsвАЩ, unzip it and copy the encryption kits to your WordPress directory вАШwp-content/plugins/boomcaptcha/fontsвАЩ.

Contributors & Developers

“Boomcaptcha” is open source software. The following people have contributed to this plugin.


Translate “Boomcaptcha” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.