The Captcha plugin allows you to implement a super security captcha form into web forms. It protects your website from spam by means of math logic, easily understood by human beings. You will not have to spend your precious time on annoying attempts to understand hard-to-read words, combinations of letters or pictures that make your eyes pop up. All you need is to do one of the three basic maths actions - add, subtract and multiply. This captcha can be used for login, registration, password recovery, comments forms. There is also a premium version of the plugin, allowing compatibility with BuddyPress (Registration form, Comments form, "Create a Group" form) and Contact Form 7.
Video instruction on Installation
Upgrade to Pro Version


* Display: You can use letters and numbers in captcha or just one of these two things - either letters or numbers.

* Actions: The basic math actions are used - add, subtract, multiply.

* Label: You can add a label to display captcha in the form.

Recommended Plugins

The author of the Captcha also recommends the following plugins:

* Updater - This plugin updates WordPress core and the plugins to the recent versions. You can also use the auto mode or manual mode for updating and set email notifications.

There is also a premium version of the plugin Updater Pro with more useful features available. It can make backup of all your files and database before updating. Also it can forbid some plugins or WordPress Core update.


* Arabic (ar_AR) (thanks to Albayan Design Hani Aladoli)

* Bangla (bn_BD) (thanks to SM Mehdi Akram,

* Brazilian Portuguese (pt_BR) (thanks to Breno Jacinto,

* Bulgarian (bg_BG) (thanks to Nick)

* Catalan (ca) (thanks to Psiete)

* Chinese (zh_CN) (thanks to Billy Jeans)

* Taiwan (zh_TW) (thanks to Henry H)

* Croatian (hr) (thanks to Daniel)

* Czech (cs_CZ) (thanks to Tomas Vesely, Crysman)

* Danish (da_DK) (thanks to Byrial Ole Jensed)

* Dutch (nl_NL) (thanks to Bart Duineveld)

* Estonian (et) (thanks to Ahto Tanner)

* Greek (el) (thanks to Aris,

* Farsi/Persian (fa_IR) (thanks to Meysam Parvizi,

* Finnish (fi) (thanks to Mikko Sederholm)

* French (fr_FR) (thanks to Martel Benjamin, Capronnier luc)

* German (de_DE) (thanks to Thomas Hartung, Lothar Schiborr)

* Hebrew (he_IL) (thanks to Sagive SEO)

* Hindi (hi_IN) (thanks to Outshine Solutions,

* Hungarian (hu_HU) (thanks to Bőm Tamás)

* Japanese (ja) (thanks to Foken)

* Indonesian (id_ID) (thanks to Nasrulhaq Muiz,

* Italian (it_IT) (thanks to Gianluca Di Carlo, Marco)

* Latvian (lv) (thanks to Juris O)

* Lithuanian (lt_LT) (thanks to Arnas)

* Norwegian (nb_NO) (thanks to Tore Hjartland)

* Polish (pl_PL) (thanks to Krzysztof Opuchlik)

* Romanian (ro_RO) (thanks to Ciprian)

* Russian (ru_RU)

* Serbian (sr_RS) (thanks to Radovan Georgijevic)

* Slovak (sk_SK) (thanks to Branco Radenovich)

* Slovenian (sl_SI) (thanks to Uroš Klopčič,

* Spain (es_ES) (thanks to Iván García Cubero)

* Swedish (sv_SE) (thanks to Christer Rönningborg, Blittan)

* Tagalog (tl) (thanks to Roozbeh Jalali,

* Turkish (tr_TR) (thanks to Can Atasever,

* Ukrainian (uk)

* Vietnamese (vi_VN) (thanks to NDT Solutions)

If you would like to create your own language pack or update the existing one, you can send the text of PO and MO files for BestWebSoft and we'll add it to the plugin. You can download the latest version of the program for work with PO and MO files Poedit.

Technical support

Dear users, our plugins are available for free download. If you have any questions or recommendations regarding the functionality of our plugins (existing options, new options, current issues), please feel free to contact us. Please note that we accept requests in English only. All messages in another languages won't be accepted. If you notice any bugs in the plugins, you can notify us about it and we'll investigate and fix the issue then. Your request should contain URL of the website, issues description and WordPress admin panel credentials. Moreover we can customize the plugin according to your requirements. It's a paid service (as a rule it costs $40, but the price can vary depending on the amount of the necessary changes and their complexity). Please note that we could also include this or that feature (developed for you) in the next release and share with the other users then. We can fix some things for free for the users who provide translation of our plugin into their native language (this should be a new translation of a certain plugin, you can check available translations on the official plugin page).

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  1. quiero el plugin

  2. The captcha shows up under the “Submit comment” button.
    Any idea what could be causing this?

    • Hi Frank,

      If in the comments.php file there is a hook to call captcha (after_comment_field or something like that), you can change captcha’s location by moving this hook calling. Otherwise there will be the comment_form() function calling and it will be impossible to change captcha’s location.


  3. Question, if you wouldnt mind.
    I am using Formidable Pro: I added the math captcha, and it shows up on my form. However, it is all the way to the right of form & submit button is to the left.
    I searched all through settings and throughout this website and found nothing on formidable forms and styling.
    Is there anyway to have the match captcha to the left or directly over the submit (which is indented slightly)???

    • Hi Adam,

      Unfortunately, we are not the developers of Formidable Pro, and we do not state compatibility of our captcha plugin with it, that’s why in this particular case you should contact their support service with the style question. Please note that we can also help you if you really need this, but this service should be paid since we need some time to investigate the plugin and make the necessary changes.


  4. Michael Hacker said:

    I added necessary lines to my bookingform but there is no check active if this field is filled or if it is correct filled. What have I done wrong? Do I have to “register” my bookingform to any files of captcha?

    • Hi Michael,

      Please follow the instructions below.
      = I would like to add Captcha to custom form on my website. How can I do this? =
      1. Install the Captcha plugin and activate it.
      2. Open the file with the form (where you would like to add the captcha to).
      3. Find a place to insert the code for the captcha output.
      4. Insert the necessary lines:
      `if( function_exists( ‘cptch_display_captcha_custom’ ) ) { echo “”; echo cptch_display_captcha_custom() } ;`
      If the form is HTML you should insert the line with the PHP tags:
      `<?php if( function_exists( 'cptch_display_captcha_custom' ) ) { echo "”; echo cptch_display_captcha_custom(); } ?>`
      5. Then you should add the lines to the function of the entered data checking
      `if( function_exists( ‘cptch_check_custom_form’ ) && cptch_check_custom_form() !== true ) echo “Please complete the CAPTCHA.”`

      You could add this line to the variable and display this variable in the required place instead of `echo “Please complete the CAPTCHA.”`. If there is a variable (responsible for the errors output) in the check function, this phrase can be added to this variable. If the function returns ‘true’, it means that you have entered captcha properly. In all other cases the function will return ‘false’.