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.

Hiddy captcha 1.5.1


This plugin provides you an easy captcha without javascript, without images, without math. Only a few of CSS and a few of server side.
An hidden text input is placed in comment form a human cannot see it so a human cannot compile it, a spambot otherwise see the text input and is forced to compile it.
The plugin check the existence of this text input and check if it has a value or not. It drops all comment with a value in the text input as spam.
Really simple and powerfull antispam system. Low CPU usage and no access to DB.


search in db for hiddy and simply install it or ….

  1. Upload contents of the ZIP file to your wp-content/plugins folder.
  2. Activate the “Hiddy” plugin
  3. Done 🙂

I raccomend to see the setting page

Use the page at for bug reports,
suggestions or feature requests.


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Contributors & Developers

“Hiddy captcha 1.5.1” is open source software. The following people have contributed to this plugin.


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Interested in development?

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



  • 2011/12/19 added hiddy on user registration form if enabled by wp


  • 2011/11/08 carrington-mobile theme fix (disabled hiddy in mobile version)


  • 2011/10/24 disabled default proud message display
  • php code fixes (now cannot launch hiddy.php page, returns 404 error)
  • removed already integrated WP antiflood function


  • 2011/10/20 ereg functions are deprecated in php 5.3.0 so preg_match is the new funzions
  • modified footer message
  • modified inherit div style in footer message


  • 2011/10/19 minor fixes and better option page


  • 2008/12/22 Enable dashboard editing and reply in WP 2.7 tnx to Davide Salerno


  • 2008/04/29 bug fix for compatibility with FireFox and password management


  • 2007/12/04 Activate/deactivate trackback filter
  • hooked trackback
  • improoved performance in stylesheet call
  • little bug fix


  • 2007/11/26 Added option page for flooding settings


  • 2007/11/20 Fixed some php bug :/


  • 2007/11/16 Fixed a bug for WP 2.3.1.
  • added time spent posting comment check
  • removed function.php
  • integrated genpass function


  • 2007/10/24 Bug fix (tnx to Crestina)


  • 2007/10/09 added random stylesheet name
  • added random file name
  • added random field type


  • 2007/10/08 Fix bug in edit comment (tnx Shor


  • Dont show comments that are not approved


  • 2007/10/05 Initial release