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Defer for Contact Form 7

Name: Defer for Contact Form 7
Author: Vitalii

By Vitalii

Details

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On every page Contact Form 7 loads its dependencies (wp-hooks, wp-i18n) and its CSS into the <head>, blocking first paint. This plugin fixes that:

Defer CF7 core — moves wp-hooks/wp-i18n to the footer (you cannot defer them: an inline wp.i18n.setLocaleData block runs synchronously and would throw “wp is not defined”). CF7’s scripts leave the critical path.
Async CSS — the form stylesheet loads via media=print + onload-swap.

Both optimizations are idempotent and safe on every page. Strict dependency: with Contact Form 7 inactive, the plugin does nothing.

A note on jQuery

This plugin does NOT defer jQuery — on purpose. Deferring jQuery is only safe when EVERY jQuery-dependent script on the site is also deferred or in the footer; on an arbitrary site that is not guaranteed and breaks inline scripts in the head.

Pro version

Defer for Contact Form 7 Pro adds lazy-loaded Google reCAPTCHA v3 — spam protection without a PageSpeed hit:

Google’s api.js loads only on the first interaction with a form, so it never appears in Lighthouse/PSI.
The score check is server-side; a fresh single-use token is fetched for every submission.
The badge is hidden with the required Google disclaimer (GDPR-friendly); configurable score threshold and action label.

The free version stays fully functional on its own.

Support

Questions, bug reports or feature requests: https://www.linkedin.com/in/vitalii-ryabinin/

Details

Plugin code:

defer-for-contact-form-7

Plugin version:

1.0.0

Author:

Vitalii

Outdated:

WP version:

6.0 or higher

PHP version:

7.4 or higher

Test up to WP version:

7.0

Total installations:

Last updated:

2026-07-01

Rating:

Times rated:

cf7

contact-form-7

defer

pagespeed

performance