Custom Captcha Field for Fluent Forms
Adds a “Custom Captcha” field to the Fluent Forms editor with three challenge types:
Solid choice
Custom Captcha Field for Fluent… is a solid plugin choice in 2026, with a few things worth checking first. It runs on 100+ sites, is rated 5/5 and was last updated 3 months ago, and scores 66/100 on our health check.
- Small user base (100+ active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Custom Captcha Field for Fl… stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| antispam | #60 |
| captcha | #83 |
| fluent forms | #52 |
| math captcha | #16 |
| spam | >100 |
Version adoption
Share of active sites per release.
Rating breakdown
★★★★★★★★★★ 5 from 1 reviews
About Custom Captcha Field for Fluent Forms
From the official readme · v2.0.0Description
Adds a “Custom Captcha” field to the Fluent Forms editor with three challenge types:
- Image captcha — a 6-character code rendered as an image, with customizable text color and a transparent background by default so it blends with any form design
- Math captcha — a simple arithmetic question rendered as an image
- Question and answer — you define the question (field label) and the expected answer
Challenges are single-use and expire after 15 minutes. Answers are stored server-side via WordPress transients — nothing is exposed to the browser except the image itself. Visitors get a refresh button to request a new challenge, and the captcha automatically renews after each AJAX submission, so it also works on cached pages.
On top of the captcha you get two extra spam defenses:
- Time-trap (optional, off by default) — submissions completed faster than a human possibly could are rejected via an HMAC-signed timestamp; enable it and set the minimum submit time per field
- Disposable email blocking (optional, on by default) — rejects submissions where an email field uses a temporary/disposable email domain like mailinator.com or yopmail.com; extend the list with the
ffc_captcha_blocked_email_domainsfilter
Everything runs on your own server: no external captcha service, no API keys, no cookies, no visitor data sent anywhere.
Requirements
Fluent Forms is required. The PHP GD extension is recommended for image rendering (with a plain-text fallback when unavailable).
How To Use
- Activate the plugin
- Edit a form in Fluent Forms — a new “Custom Captcha” field appears in the editor
- Drop it into your form and pick the captcha type in the field settings
- Optionally set the text color, background color (RGB values like “68, 68, 68”, or “transparent”) and error message
Installation
- Login to your WordPress Admin Area
- Go to Plugins -> Add New
- Type “Custom Captcha Field for Fluent Forms” into the Search and hit Enter
- Find this plugin and click “Install Now”
- Activate the plugin
- Add the Custom Captcha field to your form in the Fluent Forms editor
Changelog
2.0.0
- Security: challenge answers are no longer stored in a publicly readable file; each challenge is now a single-use, expiring token stored via WordPress transients
- Security: removed eval() from math captcha validation
- Added: transparent captcha background (new default) and customizable text/background colors
- Added: refresh button on the captcha image
- Added: captcha auto-renews after AJAX submissions and on page load, so it works with page caching
- Added: optional time-trap — reject submissions completed faster than a configurable minimum (default 3 seconds) or carrying a tampered timestamp
- Added: optional disposable email blocking for the whole form (filterable via ffc_captcha_blocked_email_domains)
- Fixed: compatible with Fluent Forms 5+ hook names (validation no longer relies on a deprecated hook)
- Fixed: math challenges no longer produce negative answers
- Fixed: text captcha comparison is now trimmed and case-insensitive
- Fixed: field renamed from “Recaptcha” to “Custom Captcha” (this plugin is not related to Google reCAPTCHA)
1.0.0
- Initial release
For developers
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FAQ
Custom Captcha Field for Fluent For…: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 3, 2026
Is Custom Captcha Field for Fluent… free?
Yes. Custom Captcha Field for Fluent… is free to download and use from the official WordPress.org plugin directory.
Is Custom Captcha Field for Fluent… safe to use in 2026?
Custom Captcha Field for Fluent… is a solid plugin choice in 2026, with a few things worth checking first. It runs on 100+ sites, is rated 5/5 and was last updated 3 months ago, and scores 66/100 on our health check.
How many websites use Custom Captcha Field for Fluent…?
Custom Captcha Field for Fluent… is active on 100+ WordPress websites and has been downloaded 1,987 times since it launched in August 2024. It was downloaded 142 times in the last 30 days.
Does Custom Captcha Field for Fluent… work with WordPress 7.1?
Custom Captcha Field for Fluent… is officially tested up to WordPress 7.0.6, while the latest release is 7.1.2. It may still work, but try it on a staging site first.
What PHP version does Custom Captcha Field for Fluent… need?
Custom Captcha Field for Fluent… requires PHP 7.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Custom Captcha Field for Fluent… last updated?
The latest version, 2.0.0, was released on July 9, 2026 (3 months ago).
Who makes Custom Captcha Field for Fluent…?
Custom Captcha Field for Fluent… is developed and maintained by Lukman Hussain Nakib.
What are the best alternatives to Custom Captcha Field for Fluent…?
The most popular alternatives to Custom Captcha Field for Fluent… are Akismet Anti-spam: Spam Pro… (5M+ installs), Antispam Bee (700K+ installs) and reCaptcha by BestWebSoft (100K+ installs).
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