Duplicate Killer – Prevent Duplicate Form Submissions
Duplicate Killer – Block Duplicate Form Submissions in WordPress. WooCommerce – Prevent Accidental Duplicate Orders Duplicate Killer also protects WooCommerce Classic Checkout from accidental duplicate orders. WooCommerce already disables the “Place order” button, but duplicate orders can still happen when: Checkout is slow Payment gateways lag or retry Customers refresh the page Multiple tabs are used Network requests are retried Duplicate Killer FREE adds lightweight server-side duplicate protection for WooCommerce Classic Checkout. If the same customer attempts to submit an identical order within 60 seconds, the duplicate is blocked and a validation message is shown. !!! No changes to your checkout design. No impact on performance. No additional configuration required. If your forms receive the same email address multiple times, fake leads, or repeated submissions, this plugin blocks them instantly. Choose which fields must be unique (email, phone, text) and block duplicate entries automatically — without changing your form design or user experience. Duplicate Killer works silently in the background and integrates seamlessly with popular WordPress form plugins and page builders. Cross-Form Duplicate Protection (PRO) Duplicate Killer PRO introduces Cross-Form Duplicate Protection. This feature allows duplicate detection across multiple forms on your website. For example, if a user submits the same email address in two different forms, Duplicate Killer PRO can detect the duplicate and block the second submission. This is useful when: – multiple contact forms exist across different pages – marketing forms collect the same email address – lead capture forms should only allow one submission per user – different form plugins are used on the same site This feature is available in Duplicate Killer PRO. Free: In the free version, duplicate protection can be enabled for one form per supported plugin. PRO: Duplicate Killer PRO enables multi-form protection with individual rules and messages per form. Supported Plugins Elementor Forms Contact Form 7 Formidable Forms WPForms Lite Forminator Ninja Forms Breakdance Page Builder Forms Key Features ✔ Prevent duplicate form submissions without CAPTCHA ✔ Works with existing forms – no changes required ✔ Prevent duplicate submissions by Email, Phone or Text fields ✔ Stop duplicate emails and repeated leads ✔ One global error message for all forms (Free version) ✔ Cross-Form Duplicate Protection (PRO) ✔ Detect duplicates across multiple forms ✔ Optional IP-based duplicate protection ✔ Store unique entries securely in your WordPress database ✔ Automatically store uploaded files from Contact Form 7 ✔ Lightweight, fast and easy to configure ✔ WooCommerce Classic Checkout duplicate protection ✔ Server-side fingerprint validation (Email + Cart + Total + Currency) ✔ Fixed 60-second protection window (FREE) ✔ Structured duplicate logging (ready for PRO analytics upgrade) ✔ No changes to checkout or form design Common use cases Prevent duplicate leads in contact and lead generation forms Keep CRM and email lists clean Block repeated event registrations with the same email Ninja Forms Prevent duplicate submissions by Email, Phone or Text fields Clean validation messages No form design changes required NEW: Formidable Forms Support Duplicate Killer now fully supports Formidable Forms and helps you stop duplicate form submissions in WordPress. You can prevent duplicate entries in Formidable Forms contact forms and advanced forms by enforcing unique fields such as email address, phone number, or text fields. This feature works with Formidable Forms native fields, requires no additional configuration. Does not affect form design or user experience. Elementor Forms Support Duplicate Killer fully supports Elementor Forms. You can prevent duplicate submissions in Elementor contact forms, lead forms and popups by enforcing unique values such as email or phone number. NEW in PRO version: Elementor Group Mode allows you to treat multiple forms with the same Form Name as one unified protected form — even if Elementor generates different form IDs internally. Plugin Integrations Contact Form 7 Limit submissions by Email, Phone or Text fields Custom validation message for duplicate entries Automatically store uploaded files locally Elementor Forms Prevent duplicate submissions on Elementor native forms Works with contact forms, lead forms and popups Seamless integration without modifying form structure Forminator Select unique fields (Email, Phone, Text) Warn users when a value has already been submitted WPForms Lite Prevent duplicate entries without changing form layout Clean and simple validation messages Breakdance Page Builder Forms Prevent duplicate submissions on Breakdance native forms IP-based validation for cleaner data Fully compatible with Breakdance UI Free vs Pro Free Version Protect one form (per supported plugin) Global duplicate protection rules (for the protected form) One global error message Global IP-based submission limits Unique entries per user (cookie-based) WooCommerce (FREE): – Protect Classic Checkout only – Fixed 60-second lock window – Basic duplicate detection – Stores structured logs for seamless upgrade to PRO analytics Duplicate Killer PRO Protect multiple forms Per-form duplicate protection rules Cross-Form Duplicate Protection (detect duplicates across different forms) Custom error message for each form Different IP limits per form Unique entries per user, configurable per form Designed for sites with multiple forms and different submission needs Duplicate Killer PRO is ideal for sites with multiple forms and different audiences. WooCommerce PRO adds: – Checkout Blocks (Store API) support – Configurable lock window (30–300 seconds) – Advanced fingerprint controls (phone, shipping, IP, customer ID) – Order linking (direct link to matching WooCommerce order) – Gateway breakdown (Stripe, PayPal, COD, etc.) – Trends dashboard (Last 24h, 7 days, 14 days) – CSV export for audits and support teams – Detailed analytics (top products, domains, checkout types, IPs) – Designed for real-world edge cases such as slow hosting, gateway retries, reverse proxies and unstable mobile networks. When to use Duplicate Killer Use this plugin if you receive repeated submissions with the same email, phone number or text values. If you only need basic spam protection, a CAPTCHA plugin may be enough. When should I use Duplicate Killer PRO? Use the PRO version if your site has multiple forms with different purposes — for example a contact form, a registration form and a newsletter signup — and each one needs different duplicate submission rules. Does FREE support WooCommerce Checkout Blocks? No. Checkout Blocks use a different system (Store API) and require the PRO version. What happens if I upgrade to PRO later? All WooCommerce duplicate logs stored in the FREE version are automatically used by PRO analytics. No database migration is required. Does this prevent payment gateway retries? FREE prevents accidental duplicate submissions on Classic Checkout. PRO adds enhanced idempotency handling and deeper gateway analytics.
EntryDashboard – Database Addon & Sync for WPForms, CF7, Elementor & More
EntryDashboard – Forms Entries Manager gives you a powerful way to manage, search, and organize submissions from multiple form plugins in one clean interface. No more digging through emails or scattered plugin screens. With EntryDashboard, you get a centralized entries hub for popular plugins like WPForms, Contact Form 7, Elementor Forms, and more (with additional integrations coming soon). Whether you want to search, filter, export, or sync with Google Sheets, EntryDashboard makes it simple to treat form submissions like the valuable leads and data they truly are. Think of it as your mini-CRM—but directly inside WordPress. Watch the quick demo to see EntryDashboard in action! What’s New | Docs | Video Tutorials | Get Help ✨ Why EntryDashboard? All Entries, One Dashboard – A unified view for submissions across supported form plugins. Mini-CRM Features – Add private notes, star favorites, and keep track of follow-ups. Google Sheets Integration – Secure OAuth 2.0 connection, no API keys required. Smarter Workflow – Bulk actions, status management, quick-view modals, and more. Export Data Easily – Export filtered entries to CSV. 🚀 Free Features Centralized entry listing with counts for all supported forms. Grouping per form in admin dashbaord Clean modal view to display entry details. Copy entry easily Read/Unread status management. Favorite (star) important entries. Bulk actions for deleting, marking status, and more. Global search and date range filtering. Print-friendly entry view. Notes & comments on entries (mini-CRM style). Google Sheets integration with OAuth 2.0 (manual and auto sync). Google Sheet Sync (upto 500 rows) still it will be saved in db and thus resync after upgrade Manually Sync individual entry (Click every entry to send in sheet) Manually Unsync individual entry (Remove from sheet) Live view of connected email for entry sync Export to CSV. 🌟 Premium (Pro) Features Unlimited Google sheet rows Failed entry re-sync to google sheet Bulk, Asyn entry sync to google sheet with Action Scheduler Export entries to Excel (XLSX) and PDF. Advanced reporting and analytics. Integrations with Gravity Forms, Ninja Forms, and more. Team collaboration tools (assign entries, activity log). Extended Google Sheets sync options (conditional sync, multiple sheets). Priority support and updates. Manage all your form entries effortlessly with EntryDashboard Pro – Entries Manager! Supported Form Plugins Works with WPForms (Lite & Pro). Works with Contact Form 7. Works with Elementor Forms. More integrations (like Gravity Forms, Ninja Forms) coming soon. External services This plugin utilizes two external services to provide its core features: its own EntryDashboard Backend Service and the Google Sheets API. 1. EntryDashboard Backend Service (backend.entriesmanager.com) This service acts as a secure intermediary for handling authentication and site features. What it is used for: * Secure Authentication Proxy: It helps manage the secure OAuth 2.0 connection and refresh tokens for Google Sheets integration. This prevents highly sensitive tokens from being fully exposed on the WordPress site. * License/Feature Verification: It is used to verify the status of the EntryDashboard Pro license and enable premium features. What data is sent and when: * During initial connection/refresh: Your website’s URL (e.g., https://your-site.com) is sent to the backend service to identify the site requesting tokens or feature verification. * During Google Sheets setup: An authorization code is temporarily sent to exchange for the secure access tokens. * No form entry data is sent to this backend service. Service Provider: * EntryDashboard (The plugin author) * Terms of Service: https://entriesmanager.com/terms-of-service/ * Privacy Policy: https://entriesmanager.com/privacy-policy/ 2. Google Sheets API (Google LLC) This service is used to sync your form submission data directly to your designated Google Sheet. What it does: * Sends form entry data (like name, email, and submission fields) to your designated Google Sheet when syncing. * Receives data updates if using bidirectional sync (if applicable). When data is sent: * Each time an entry is synced manually or automatically via scheduled sync. Service Provider: * Google Sheets API (Google LLC) * Terms of Service: https://policies.google.com/terms * Privacy Policy: https://policies.google.com/privacy User Control: * Users can choose which forms and which fields are synced. * User can sync, unsync manually from dashboard. * Sync can be disabled at any time in the plugin settings. Third-Party Libraries and Source Code This plugin includes several third-party libraries that are distributed in minified or compiled format. In compliance with the WordPress.org Plugin Guidelines, links to their original public source code are provided below: Alpine.js (alpine.min.js) Purpose: Provides a lightweight, declarative JavaScript framework for building reactive UI components. Source Code: https://github.com/alpinejs/alpine Lottie Player (lottie-player.js) Purpose: Renders Lottie animations (JSON-based vector animations) for UI feedback and interactions. Source Code: https://github.com/LottieFiles/lottie-player Tailwind CSS (tailwind.min.js or tailwind.min.css) Purpose: Utility-first CSS framework used to style the admin UI. Source Code: https://github.com/tailwindlabs/tailwindcss Collapse Utility (collapse.js) Purpose: Handles simple toggle/accordion interactions in the admin UI. Source Code: https://alpinejs.dev/plugins/collapse The rest of the plugin’s code, including admin.css and admin.js, is maintained in human-readable format and is not obfuscated or minified.
