Duplicate Killer · Version history
Duplicate Killer changelog and version history
- Latest version
- 1.7.8
- Nov 2, 2026 (7 days ago)
- Releases
- 42
- since 2025
- In the last year
- 36
- about one every 9 days
- Tested up to
- WordPress 7.1.4
- PHP 5.6.20 or later
Releases each year
- 20258 releases
- 202634 releases
202634 releases
Duplicate Killer 1.7.8Latest
- Fixed duplicate checks running after SureForms Stripe payment processing.
- Duplicate field and IP checks now run before payment processing during form submission.
Duplicate Killer 1.7.7
- Fixed duplicate protection for Formidable Forms payments.
- Failed payments and invalid submissions no longer create Duplicate Killer records.
- Improved Product, Quantity, and Total field labels in submission details.
Duplicate Killer 1.7.6
- Fixed duplicate protection for WPForms Stripe payments.
- Failed payments no longer create Duplicate Killer records.
- Fixed duplicate errors when returning from 3D Secure authentication.
Duplicate Killer 1.7.5
- Fixed duplicate submission handling for Contact Form 7 native Stripe payments.
- Payment forms now save Duplicate Killer records only after payment is confirmed.
- Prevented Stripe checkout from replacing duplicate protection messages.
Duplicate Killer 1.7.4
- New: Added SureForms support for duplicate submission protection.
- New: Added early duplicate email checks for SureForms Stripe payments.
- Fix: Improved support for longer form names.
Duplicate Killer 1.7.3
- You’re in control! Choose the exact form you want to protect with Duplicate Killer.
- Switch forms easily from the plugin settings.
Duplicate Killer 1.7.2
- Added MetForm support for duplicate submission protection.
- Added Modern Popup Mode for MetForm.
- Display uploaded file links in submission details.
- Added MetForm diagnostics and deactivation feedback.
Duplicate Killer 1.7.1
- Added hours and minutes to duplicate submission block duration.
- Added hours and minutes to IP block duration.
- Fixed IP block expiry when the site uses a local time zone.
- Highlighted active duration values in the settings.
Duplicate Killer 1.7.0
- New: Modern Popup Mode displays duplicate submission messages in a customizable popup.
- Customize messages with links, colors, and formatted text.
- Preview your popup directly in the plugin settings.
- Choose Classic Message or Modern Popup Mode for each form.
- Existing forms keep Classic Message by default.
Duplicate Killer 1.6.9
Duplicate Killer 1.6.8
- Improved WordPress.org Plugin Check compliance across admin, diagnostics, and database handling.
- Refined escaping, internationalization comments, and compatibility safeguards.
- Added clearer inline documentation for intentional custom-table queries.
Duplicate Killer 1.6.7
- Added Fluent Forms support for duplicate submission protection. *Improved admin UI compatibility for Fluent Forms fields.
Duplicate Killer 1.6.6
- Improved compatibility with popup-based Contact Form 7 message plugins.
- Duplicate protection messages now display correctly when Contact Form 7 responses are shown in popups.
- Improved handling for blocked Contact Form 7 submissions without changing duplicate detection behavior.
Duplicate Killer 1.6.5
- Tweaks: Improved Elementor duplicate submission blocking.
- Tweaks: Added safer Elementor field-level validation handling.
- Tweaks: Major update to the frontend display of the submissions page.
- Fix: Duplicate error messages appearing multiple times on Elementor forms.
- Fix: Woocommerce call to undefined function
Duplicate Killer 1.6.4
- Minor stability and duplicate detection improvements for Breakdance Page Builder and Ninja Forms.
Duplicate Killer 1.6.3
- Added custom field duplicate block duration setting per form.
- Minor stability and duplicate detection improvements.
Duplicate Killer 1.6.2
- Major internal architecture refactor for duplicate validation system
- Improved duplicate validation consistency across all supported form plugins.
- Improved maintainability for future form plugin integrations.
- General code cleanup and internal optimization.
Duplicate Killer 1.6.1
- This update includes a major admin UI and CSS structure cleanup, improving layout consistency, responsiveness, and overall maintainability across the plugin interface.
Duplicate Killer 1.6.0
- New: Deactivation feedback modal to collect user insights when disabling the plugin.
- New: Secure API integration for anonymous feedback tracking (privacy-friendly).
- New: Advanced analytics foundation for better product decisions.
- Improved: Overall stability and internal architecture.
Duplicate Killer 1.5.9
- Major update: improved database structure for better consistency and scalability
- Fixed form identification inconsistencies (especially for builders like Breakdance)
- Improved duplicate detection accuracy across all integrations
- Enhanced cookie handling and per-form tracking reliability
- Better compatibility with legacy stored data (automatic fallback support)
- Performance optimizations for submission queries and lookups
- UI improvements and added contextual help links in settings
- Minor bug fixes and stability improvements
Duplicate Killer 1.5.8
- Improved duplicate protection: unconfigured forms are now ignored and IP-only protection works correctly.
Duplicate Killer 1.5.7
- Improved compatibility with Breakdance Page Builder forms
- Enhanced form detection logic for more accurate results across all Breakdance layouts
Duplicate Killer 1.5.6
- Performance improvement: Added optimized database index for faster duplicate checks.
- Improved query efficiency for duplicate validation (reduced database load).
- Optimized duplicate detection logic for large datasets (50k+ submissions).
- Minor internal performance and stability improvements.
Duplicate Killer 1.5.5
- Improved integration of the Diagnostics module within the admin interface.
- Replaced legacy support access with direct Diagnostics navigation.
- Minor UI refinements and overall stability improvements.
Duplicate Killer 1.5.4
- Improved Elementor Forms detection to correctly identify real form instances (including Global Widgets and Popups).
- Fixed issue where duplicate submissions were not detected due to mismatched form IDs.
Duplicate Killer 1.5.3
- New PRO feature: Cross-Form Duplicate Protection.
- Allows duplicate detection across multiple forms.
- Compatible with all supported form plugins.
- Internal improvements preparing cross-form validation engine.
Duplicate Killer 1.5.2
Duplicate Killer 1.5.1
Duplicate Killer 1.5.0
Duplicate Killer 1.4.9
Duplicate Killer 1.4.8
Duplicate Killer 1.4.7
Duplicate Killer 1.4.6
Duplicate Killer 1.4.5
20258 releases
Duplicate Killer 1.4.4
Duplicate Killer 1.4.3
Duplicate Killer 1.4.0
Duplicate Killer 1.3.1
Duplicate Killer 1.3.0
Duplicate Killer 1.2.3
Duplicate Killer 1.2.2
Duplicate Killer 1.2.1
Questions about Duplicate Killer’s releases
What is the latest version of Duplicate Killer?
1.7.8, released on Nov 2, 2026 (1 week ago). It’s tested up to WordPress 7.1.4 and needs PHP 5.6.20 or later.
How often is Duplicate Killer updated?
36 releases in the last year, about one every 9 days. Its first release on WordPress.org dates from February 2025.
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Start freeRelease dates come from the day each version’s folder was made in Duplicate Killer’s WordPress.org SVN repository; the notes from its readme’s changelog, as its authors wrote it.