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I need a lightweight Image CAPTCHA added to my existing sign-in form so that every user interaction is verified before the request reaches the server. The challenge should present a set of simple object images (think cats vs. dogs, cars vs. bikes—no cluttered scenes) and require the user to pick the correct item in order to continue. Here’s what matters most: • Accuracy and speed: the CAPTCHA has to load quickly and flag bots reliably without delaying real visitors. • Clean, accessible code: please write modular, well-commented PHP/JavaScript (or a similarly common stack) so I can tweak imagery or thresholds later. • Server-side validation: after the browser picks up the user’s choice, I want a secure back-end check to prevent spoofing. • Seamless look and feel: match the colours and typography of my current form; no jarring iframes or external branding. Once finished, deliver the full source, image set, and a short README covering installation and customization. I will test by deploying it on a staging URL—if bots slip through or real users stall, we’ll iterate until the pass rate is solid.
Project ID: 40429717
22 proposals
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Active 3 days ago
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22 freelancers are bidding on average ₹4,318 INR/hour for this job

Skipping external iframes is the right move for login speed and data privacy. A self-hosted solution with strict server-side validation gives you full control over the threat model. I've built secure authentication flows using PHP and JavaScript for fintech platforms where latency was not an option. The approach involves generating unique session tokens for each challenge to prevent replay attacks. I'll deliver clean modular code with the specific object images ready for your staging tests. Performance won't be an issue since we're avoiding third-party API calls. What framework is your current sign-in form running on?
₹750 INR in 7 days
6.6
6.6

Hello, I can add a lightweight image based CAPTCHA to your sign in form with fast loading secure server side validation and a seamless design that matches your existing UI. I will build it using clean modular PHP and JavaScript so you can easily update image sets logic and validation rules later. The CAPTCHA will use simple object recognition challenges with secure backend verification to prevent spoofing and automated bot bypass attempts. I will ensure the experience remains smooth and accessible for real users while maintaining strong bot resistance. You will receive full source code image assets and a clear README covering installation customization and testing. I am ready to start immediately and can refine the solution based on your staging feedback.
₹1,000 INR in 40 days
5.2
5.2

Having been in the industry for over 13 years, I have honed my skills in web development, with particular expertise in both backend and frontend coding using PHP, JavaScript, and a range of other complementary technologies offered by your project. Throughout my career, I have successfully designed and implemented robust APIs similar to the one you require for your CAPTCHA integration. Opting for a well-structured API is crucial, particularly given the importance of your project's security features. One of my key strategies involves creating modular and well-commented codebases that not only meet present needs but can be easily adjusted in the future. This flexible approach aligns with your vision of having a seamless integration that reflects your existing aesthetics. To restate what I bring to the table: a proven track record ???????? scalable, secure applications; deep knowledge in relevant technologies; laser-focused work ethic; strong ???????? ????? record; and an ability to consistently deliver high-quality products on time. Your project aligns perfectly with my skill set and I am confident that my commitment to detail matches your need for accuracy and speed. Let's get started!
₹1,000 INR in 40 days
3.9
3.9

As a full-stack developer with over a year's unique experience, I'm confident in my ability to successfully integrate the Image CAPTCHA solution you seek for your sign-in form. My mastery of PHP and JavaScript, coupled with my commitment to clean, accessible code ensure that I will deliver a solution that easily satisfies your need for modular, well-commented code, simplifying future tweaks to imagery or thresholds. The issue of accuracy and speed is crucial and not lost on me. With a keen understanding of the balance required between server-side validation and an efficient user experience, I will employ industry best practices to guarantee prompt bot-flagging without any inconvenience for real visitors. Finally, let's talk look and feel. Understanding the importance of brand uniformity, I will blend into your existing form seamlessly with no jarring iframes or external branding. My work aims to craft secure CAPTCHA systems that protect you from bots while making it an effortless process for your genuine users - just as it should be! Thank you for considering me for this project. Let's create an authentication system that perfectly suits your needs!
₹1,000 INR in 40 days
3.8
3.8

Most custom CAPTCHAs fail for one of two reasons: either they’re too weak against bots or too frustrating for real users. I’ll build this as a lightweight, fast, and server-validated image challenge that balances usability with protection. How I’ll implement it: • Image-based CAPTCHA with simple object selection Example: cats vs dogs, cars vs bikes Clean UI, fast-loading optimized images Randomized image order to reduce automation success • Frontend (JavaScript) Smooth interaction inside your existing sign-in form No external branding or iframes Styled to match your current UI/colors/fonts • Backend Validation (PHP or your stack) Secure token/session-based verification Prevent spoofed requests or bypass attempts Expiration + retry handling • Bot Resistance Rate limiting hooks ready Replay protection Configurable difficulty/image pools • Maintainability Modular, well-commented code Easy image replacement and threshold adjustment later Deliverables Full source code Image set/assets README for install + customization Staging support/testing Focus Fast load times Low friction for real users Stronger protection than basic text CAPTCHA I’ve handled similar custom validation and frontend/backend integration work before. The goal will be security without damaging user experience.
₹1,000 INR in 40 days
1.2
1.2

Hello, I am Aqsa Usman, a professional with 5 years of experience in JavaScript, HTML, Web Development, and Frontend Development. I have a strong background in PHP as well, which aligns well with the requirements of your project. I have carefully reviewed your project for Image CAPTCHA Integration and understand the need for a lightweight solution that ensures accurate and fast verification of user interactions. I will develop a clean and accessible code in PHP/JavaScript to integrate the CAPTCHA seamlessly into your existing sign-in form. With over 1k websites successfully completed, I guarantee a professional and efficient solution tailored to your specific needs. Let's discuss your project in more detail. Please start the chat so we can explore how to best implement the Image CAPTCHA integration for your authentication system. Best regards, Aqsa Usman
₹1,000 INR in 40 days
0.0
0.0

Hi, I can add a lightweight image-based CAPTCHA to your existing sign-in form with clean server-side validation. I have experience with PHP, JavaScript, and Laravel-based form security, and I can implement: - Fast image CAPTCHA loading - Secure backend validation - Simple object-based challenge flow - Clean, modular, well-commented code - Easy customization for images and thresholds later I will make sure it matches your current form design and does not feel like an external plugin or iframe. I can also provide the full source code and a short README for setup and customization. Ready to start immediately. Thanks
₹1,000 INR in 40 days
0.0
0.0

Hello, I can help you build a lightweight and fast image CAPTCHA system that integrates smoothly with your existing sign-in flow while maintaining a clean user experience. I understand the importance of balancing usability with reliable bot protection, including secure server-side validation and a seamless frontend design that matches your current UI. I focus on writing clean, modular, and maintainable code so future customization of image sets, thresholds, or validation logic remains simple. Performance, responsiveness, and accessibility are also priorities to ensure real users are not slowed down while bots are effectively filtered. I’d be happy to discuss your current stack, integration requirements, and preferred workflow in more detail. Looking forward to working with you.
₹750 INR in 40 days
0.0
0.0

I have experience working with PHP, JavaScript, HTML, and backend validation for web applications. I can implement the CAPTCHA in a lightweight and modular way, with secure server-side checking and clean frontend integration. I also focus on writing maintainable code with clear documentation so the image set and validation logic can be adjusted easily in the future.
₹1,000 INR in 40 days
0.0
0.0

Hi, At APIE Tech, we have built custom CAPTCHA and authentication security layers in PHP/JavaScript — exactly the kind of clean, integrated solution you are describing. Here is how we would approach this: Frontend (JavaScript): - Lightweight image challenge widget rendering a randomised set of object images (cats/dogs, cars/bikes, etc.) from your curated set - Click-to-select interaction with clear visual feedback - Styled to match your existing form colours and typography — no iframes, no external branding Backend (PHP): - Session/token-based challenge generation: each CAPTCHA instance has a unique server-side token - Server-side validation endpoint: browser submits user selection + token, backend verifies and rejects spoofed or replayed submissions - Configurable pass threshold and image categories Deliverables: - Full PHP + JavaScript source code, modular and well-commented - Image set ready to swap or extend - Short README covering installation, customisation, and threshold tuning We will test on a staging URL and iterate until bot-flagging is solid without friction for real users. Ready to start immediately. Best, APIE Tech
₹1,000 INR in 40 days
0.0
0.0

Hi! I can build a lightweight, fast-loading image CAPTCHA that integrates smoothly into your existing sign-in form without relying on external services or branded iframes. The system will use clean object-selection challenges (cats vs. dogs, cars vs. bikes, etc.) with secure server-side validation in PHP/JavaScript to prevent spoofing and automated abuse. I’ll keep the code modular, well-commented, and easy to customize for new image sets, difficulty levels, or validation rules later. The final package will include full source code, optimized image assets, installation instructions, and a concise README. I’ll also help refine the CAPTCHA after staging tests to ensure strong bot resistance without frustrating real users.
₹750 INR in 50 days
0.0
0.0

As a seasoned web developer and a proud React aficionado, I have encountered various challenges in my journey to IR4.0 excellence but none more so than those related to security and user authentication. I admire your commitment to enhancing user experience whilst maintaining data veracity. Drawing from my vast experience, implementing the given lightweight Image CAPTCHA using modular, well-commented HTML/PHP/JS is right up my alley. Aside from being zealous about clean code and rapid delivery, ensuring server-side validation is one of my proudest talents. Your request harmonizes with this skillset. I'm prepared to elegantly tailor your existing sign-in form with a CAPTCHA that operates seamlessly with matching colors and typography-- no jarring iframes or external branding. Should you need post-deployment tweaks, consider it done without a hitch. In the end, I believe in long-term partnerships and effective collaborations. Throughout the project, we will stay in constant communication leveraging platforms like GitHub and utilising time zones for uninterrupted workflow. With me on board, you will receive not just the finished product but also comprehensive documentation for ongoing administration. Let's build an impregnable user-authentication system that fits elegantly on your website whilst ensuring a secure environment for all users!
₹1,000 INR in 12 days
0.0
0.0

Hi, I’d love to help you build a lightweight image-based CAPTCHA that integrates smoothly into your existing sign-in form while keeping both usability and bot protection strong. I’m a great fit for this project because I focus on building secure, fast, and maintainable authentication components without relying on bulky third-party services or external branding. I can create a clean object-selection CAPTCHA (cats vs. dogs, cars vs. bikes, etc.) that feels native to your UI and loads quickly across devices. What I’ll deliver: * Modular PHP + JavaScript code with clear comments * Fast-loading image challenge component * Secure server-side validation to prevent spoofing/replay attacks * Responsive UI matching your existing colours and typography * Organized image set for easy future updates * README with installation and customization instructions Security and performance will be priorities. I’ll implement randomized challenges, session/token validation, expiration handling, and request integrity checks so bots are filtered effectively without slowing down real users. I also understand the importance of usability. The CAPTCHA will be lightweight, accessible, and designed to minimize friction for legitimate visitors while still detecting automated abuse reliably. Once deployed on your staging environment, I’m happy to iterate and fine-tune thresholds or challenge logic until the pass rate and bot detection quality meet expectations. Best regards Jeevan Jyoti Choudhury
₹750 INR in 40 days
0.0
0.0

I am a Software Engineer specializing in high-performance web systems and secure verification. I will integrate hCaptcha into your sign-in form to ensure a lightweight, bot-proof experience without sacrificing speed.
₹75,000 INR in 7 days
0.0
0.0

Jamalpur, India
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