Krzysztof Busłowicz

[This plugin is outdated and no longer maintained. Please use the much easier Honeypot for CF7 instead.]
Adds double opt-in functionality to CF7 forms submissions. Double opt-in means that form submitters have to confirm their identity by their email account. The plugin is ready for translation.
Double opt-in dependencies
This plugin is an add-on to <a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">Contact Form 7</a> plugin by Takayuki Miyoshi. 
Functionality of this plugin also depend on installing and activating one of the plugins, which saves Contact Form 7 submissions to WordPress database. At the time, compatible plugins are:
<ul>
<li><a href="https://wordpress.org/plugins/flamingo/" rel="ugc">Flamingo</a> by Takayuki Miyoshi</li>
<li><a href="https://wordpress.org/plugins/contact-form-cfdb7/" rel="ugc">Contact Form 7 Database Addon – CFDB7</a> by Arshid</li>
</ul>
Note that BOTH Contact Form 7 and one of the listed above plugins are required for double opt-in functionality to work.
Help and Docs
The first and most complete documentation is located on <a href="https://sirta.pl/double-opt-in-for-contact-form-7-documentation/" rel="nofollow ugc">plugin official page</a>. 
If you’re a developer, feel free to take a look at <a href="https://github.com/elkurczako/Double-Opt-in-for-CF7" rel="nofollow ugc">the plugin page on GitHub repository</a>. 
You can also seek for help on WordPress support forum.
Plugin features
<ul>
<li>One click conversion of existing CF7 forms into double opt-in enabled forms.</li>
<li>URL parameters encryption to make confirmation links safe.</li>
<li>HTML email templates with mail tags similar to used in CF7 plugin. If you know how to configure CF7 emails, double opt-in will be easy.</li>
<li>Automatic creation of the “opt-in” page to process confirmed submissions.</li>
<li>Adding a CSV file attachment to final submission email containing form data.</li>
<li>Adding file attachment to final confirmation email sent to the submitter.</li>
<li>Setting expiration time for submissions to be confirmed.</li>
<li>Ability to manually confirm forms. That can be useful if your submitter enters an invalid email address, and you are sure you want to send their submission anyway.</li>
</ul>
Additional enhancements
Apart from its main feature, Double Opt-in for CF7 adds some functions you may find nice and useful:
<ul>
<li>Custom, accessible file upload inputs for your forms which look better, can be CSS styled and allow easy selecting and deselecting files to upload. This works for every CF7 form, not only double opt-in enabled.</li>
<li>Custom, more specific validation errors for radio buttons and checkboxes for improved accessibility.</li>
<li>Option to change CSV separator when exporting submissions from Flamingo plugin. It also adds BOM to CSV exports, allowing them to be properly opened in MS Excel. </li>
<li>Additional column on Flamingo Inbound Messages screen indicating if submission is complete or still waiting for being confirmed by sender.</li>
</ul>
What is double opt-in and why use it:
Double opt-in is the safe way of receiving site visitor’s submitted input. Used with contact forms or online questionnaires or with user registration, it helps to reduce spam submissions. With GDPR laws, double opt-in is a strongly recommended way of getting user data. Because submitters have to confirm their identity from their email address, you can reduce risk of processing personal data without permission. Double – means here that user submitting the data has to give consent by checking checkbox option and additionally confirm their email-address. 
Do not forget to set acceptance field in your CF7 form if GDPR is in concern!
How Double opt-in form works:
When someone fills and submits a form with double opt-in functionality, the first CF7 email goes back to THEM. There is a confirmation link in that email, which the submitter has to click on or paste in their web browser. The link has two encrypted parameters: submission serial number and submitter email address. The page with “opt-in” slug validates the parameters with submission stored in WordPress database and initiates sending of final emails to recipient set in “All Opt-In Forms” settings. If validation fails or when submission has expired, no emails are sent. If there are no specified parameters in the URL, visitors of the “opt-in” page are redirected to “404” page.
Plugin translation
Double Opt-In can be easily translated. It is released with the translation to Polish language.

Double Opt-in for CF7

This plugin adds a double opt-in functionality to CF7 forms.

Cozmoslabs

Cristian Antohe

madalin.ungureanu

Cristophor Hurduban

Razvan Mocanu

Experience a better way to translate your WordPress site and go multilingual, directly from the front-end using a visual translation interface.
TranslatePress is a <a href="https://translatepress.com/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">WordPress translation plugin</a> that anyone can use.
The interface allows you to easily translate the entire page at once, including output from shortcodes, forms and page builders. It also works out of the box with WooCommerce.
Built the WordPress way, TranslatePress – Multilingual is a GPL and self hosted translation plugin, meaning you’ll own all your translations, forever. It’s the fastest way to create a bilingual or <a href="https://translatepress.com/how-to-create-a-multilingual-wordpress-site/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">multilingual site</a>.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/EMBdXuyrZUA?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<h3>Multilingual & Translation Features</h3>
<ul>
<li>Translate all your website content directly from the front-end, in a friendly user interface (translations are displayed in real-time).</li>
<li>Fully compatible with all themes and plugins</li>
<li>Live preview of your translated pages, as you edit them.</li>
<li>Automatic translation support through <a href="https://translatepress.com/ai-free/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">TranslatePress AI Free</a>, with a 2.000 AI words limit.</li>
<li>Integrates with Google Translate, allowing you to set up unlimited automatic translations using your own Google API key.</li>
<li>Fully customizable language switcher that you can display as a menu item, a floating dropdown, or place anywhere else using the Language Switcher block, or the [language-switcher] shortcode.</li>
<li><a href="https://translatepress.com/docs/image-translation/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Image translation</a> support, for <a href="https://translatepress.com/translate-images-in-wordpress/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">translating images, sliders and other media</a>.</li>
<li>Support for both manual and automatic translation</li>
<li>Ability to <a href="https://translatepress.com/translate-dynamic-strings-wordpress/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">translate dynamic strings</a> (gettext) added by WordPress, plugins and themes.</li>
<li>Translate larger html blocks by merging strings into translation blocks.</li>
<li>Editorial control allowing you to publish your language only when all your translations are done</li>
<li>Conditional display content shortcode based on language [trp_language language=”en_US”] English content only [/trp_language]</li>
<li>Possibility to <a href="https://translatepress.com/edit-plugin-strings/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">edit gettext strings</a> from themes and plugins from English to English, without adding another language. Basically a string-replace functionality.</li>
<li>Translate only certain paths and <a href="https://translatepress.com/partially-translate-wordpress-exclude-posts-pages-products/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">exclude content from being translated</a></li>
<li>Translation Block feature in which you can translate multiple html elements together</li>
<li>Native Gutenberg support, so you can easily <a href="https://translatepress.com/translate-gutenberg-blocks-in-wordpress/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">translate Gutenberg blocks</a></li>
<li>Out of the box <a href="https://translatepress.com/translate-woocommerce-products-translatepress/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">WooCommerce</a> compatibility</li>
<li>Use our <a href="https://translatepress.com/free-website-translation-tool-widget/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">FREE Website Translation</a> tool/widget to browse any website into your own language.</li>
</ul>
Note: this plugin uses the Google Translation API to translate the strings on your site. This feature can be enabled or disabled according to your preferences.
Users with administrator rights have access to the following settings:
<ul>
<li>select default language of the website and one translation language, for bilingual sites</li>
<li>choose whether language switcher should display languages in their native names or English name</li>
<li>force custom links to open in current language</li>
<li>enable or disable url subdirectory for the default language</li>
<li>enable automatic translation via Google Translate</li>
</ul>
<h3>Powerful Translation Add-ons</h3>
TranslatePress – Multilingual has a range of <a href="https://translatepress.com/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">premium Add-ons</a> that allow you to extend the power of this WordPress translation plugin:
Pro Add-ons (available in the <a href="https://translatepress.com/pricing/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">premium versions</a> only)
<ul>
<li>Full <a href="https://translatepress.com/ai/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">TranslatePress AI</a> access – automatically translate your entire website without extra platforms to sign up for, API keys, and additional translation costs. Each premium version includes a set number of AI translated words you can use to instantly translate your site, saving you both time and money.</li>
<li><a href="https://translatepress.com/docs/addons/multiple-languages/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Extra Languages</a> – allows you to add an unlimited number of translation languages, with the possibility to publish languages later after you complete the translation</li>
<li><a href="https://translatepress.com/docs/addons/seo-pack/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">SEO Pack</a> – lets you translate meta information (like page title, description, url slug, image alt tag, Twitter and Facebook Social Graph tags & more) for boosting your multilingual SEO and increase traffic. Works with all popular SEO plugins.</li>
<li><a href="https://translatepress.com/docs/developers/different-domain-per-language/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Different Domain per Language</a> – assign a different domain to each language you add (e.g. domain.de, domain.es) and improve international SEO by creating a fully local experience for your visitors</li>
<li><a href="https://translatepress.com/docs/addons/translator-accounts/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Translator Accounts</a> – create or allow existing users to translate the site without admin rights</li>
<li><a href="https://translatepress.com/docs/addons/browse-as-role/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Browse as User Role</a> – view and translate content that is visible only to a particular user role</li>
<li><a href="https://translatepress.com/docs/addons/navigate-based-language/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Navigation Based on Language</a> – configure and display different menu items for different languages</li>
<li><a href="https://translatepress.com/docs/addons/automatic-user-language-detection/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Automatic User Language Detection</a> – redirect first time visitors to their preferred language based on their browser settings or IP address</li>
<li><a href="https://translatepress.com/docs/addons/deepl-automatic-translation/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">DeepL Automatic Translation</a> – The DeepL Automatic Translation add-on lets you automatically translate your website through the DeepL API</li>
</ul>
Keyboard Shortcuts
<ul>
<li>CTRL ( ⌘ ) + S – Save translation for the currently editing strings</li>
<li>CTRL ( ⌘ ) + ALT + Z – Discard all changes for the currently editing strings</li>
<li>CTRL ( ⌘ ) + ALT + → (Right Arrow) – Navigate to next string</li>
<li>CTRL ( ⌘ ) + ALT + ← (Left Arrow) – Navigate to previous string</li>
</ul>
<h4>Website</h4>
<a href="https://translatepress.com/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">translatepress.com</a>
<h4>Documentation</h4>
<a href="https://translatepress.com/docs/translatepress/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Visit TranslatePress WordPress Translation plugin documentation page</a>
<h4>Add-ons</h4>
<a href="https://translatepress.com/docs/translatepress/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">Add-ons</a>
<h4>Demo Site</h4>
You can test out TranslatePress – Multilingual plugin by <a href="https://demo.translatepress.com/?utm_source=wp.org&utm_medium=tp-description-page&utm_campaign=TPFree" rel="nofollow ugc">visiting our demo site</a>

Translate Multilingual sites – TranslatePress

Easy to use and well supported, thanks ;-)

Great plugin


Very Helpful!



Very Helpful for my education website! The team are super nice and kind to help me improve my site user experience.


Very Helpful!


When you want to run a website with more than just one language without making it too complicated give it a try!


TranslatePress does the job


A great plugin to easily offer the website in multiple languages. TranslatePress also allows authors to maintain translations and translate new texts. The optimization for SEO is also very good, so that our website can now be found in different languages. We love this plugin and don't want to use any other. The best thing is that the loading times do not slow down and the website is still available in multiple languages.


We love many languages - easy possible with TranslatePress


I discovered TranslatePress while looking for a way to translate our site into multiple languages. I noticed from Google Search Console that some of our content was getting impressions for keywords in other languages. That made me realize it was time to go multilingual.



After researching different translation plugins, TranslatePress stood out for being simple, affordable, and packed with useful features. I especially loved the visual front-end translation interface and the AI translation option. Once I enabled AI translation, it started translating everything automatically, no manual work needed.



What really makes TranslatePress the best:




Easy to set up and use



SEO-friendly (translates meta titles, descriptions, and sitemaps)



Great performance and stability



Ai translation



Excellent support team




Since using TranslatePress, we’ve seen a noticeable increase in international traffic. It's helped us reach new audiences without extra effort.



Highly recommended for anyone serious about growing a multilingual WordPress site.


The Best WordPress Translation Plugin


I’ve been using TranslatePress for over five years now, and it has been one of the most solid and reliable plugins in my entire WordPress setup.



What truly stands out is its flexibility. I honestly can’t think of a single element on my website that I wasn’t able to translate. From pages to dynamic content, everything is accessible and manageable directly from the front end, which makes the whole process intuitive and efficient.



As someone who works professionally with language and has become more involved in building and refining my site, I’ve come to appreciate just how powerful this plugin really is. It strikes a rare balance between simplicity and depth: easy to use on the surface, yet incredibly capable when you need full control.



TranslatePress is practical, well-designed, and simply works. It has been a key part of my website for years, and I highly recommend it to anyone serious about multilingual WordPress.


Powerful, flexible, and the best translation plugin I’ve used

Translate your entire site directly from the front-end and go multilingual. Full support for WooCommerce, page builders + Google Translate integration

Double Opt-in for CF7 vs Translate Multilingual sites – TranslatePress