Description
This plugin adds a hidden „inverted“ checkbox to your forms to prevent bots from submitting them.
- Adds support for Contact Form 7 via shortcode
[ica_checkbox] - Adds JavaScript-based hidden checkbox to regular forms in the footer
- Blocks form submission if the checkbox is unchecked or missing (typical behavior for bots)
Installation
- Upload the plugin files to the
/wp-content/plugins/inverted-checkbox-antispamdirectory, or install the plugin through the WordPress plugins screen directly. - Activate the plugin through the ‘Plugins’ screen in WordPress
- Go to ‘Settings’ ‘Inverted Checkbox Antispam’ to enable protection for CF7 or regular forms.
- If using CF7, add
[ica_checkbox]inside your form template.
FAQ
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What is an inverted checkbox?
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It’s a hidden checkbox that must remain checked. Bots often uncheck all checkboxes — which will fail the validation.
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Does this affect user experience?
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No. The checkbox is hidden using CSS/JS and is not visible or interactable for humans.
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Can I use this without Contact Form 7?
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Yes. It works with any standard HTML forms.
Reviews
There are no reviews for this plugin.
Contributors & Developers
“Inverted Checkbox Antispam” is open source software. The following people have contributed to this plugin.
Contributors
Translate “Inverted Checkbox Antispam” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0
- Initial release
- CF7 and standard form support
- Admin options page
- Safe variable handling