Best Website Optimization Tools for JavaScript
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Compare the Top Website Optimization Tools that integrate with JavaScript as of September 2025
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This a list of Website Optimization Tools that integrate with JavaScript. Use the filters on the left to add additional filters for products that have integrations with JavaScript. View the products that work with JavaScript in the table below.
What are Website Optimization Tools for JavaScript?
Website optimization tools are software solutions designed to improve the performance, speed, user experience, and search engine rankings of websites. These tools typically focus on areas like page load times, mobile responsiveness, SEO (search engine optimization), content delivery, and user engagement. Key features often include website performance analysis, A/B testing, content optimization, image compression, SEO auditing, and heatmap tracking. By identifying areas for improvement and providing actionable insights, website optimization tools help businesses enhance site functionality, improve user retention, and drive more traffic. Compare and read user reviews of the best Website Optimization Tools for JavaScript currently available using the table below. This list is updated regularly.
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1
TinyPNG
Tinify
TinyPNG (by Tinify) is a free image optimization tool trusted by developers and designers worldwide. It uses smart lossy compression to compress JPEG, PNG, WebP, and AVIF files by up to 80% without visible quality loss - boosting speed, SEO, and reducing bandwidth. Compress, convert, and resize images via our intuitive web app or powerful API. SDKs are available for Python, Node.js, PHP, Java, Ruby, and .NET. Includes an official WordPress plugin and a growing ecosystem of community-built integrations. Tinify is simple and accessible with no complex settings, no guesswork. It just works. Whether you're a beginner or building for scale, you get reliable results fast. All plans start with a generous free tier, and responsive customer support is here when you need help. George the panda 🐼 would be thrilled to see you give it a try.Starting Price: $0 -
2
TwicPics
TwicPics
TwicPics delivers perfectly sized media in real-time to your websites and apps to provide the best possible experience to all your end users. Your web pages load super-fast, no matter the device and the connection. Easy to set up, up, and fast to deploy, TwicPics makes image processing a breeze with its low-code responsive image solution. Your data transfers reduce by up to 94% while your images load 3x faster. Stop compromising visual quality and web performance. With TwicPics, your website is fast and beautiful, always. Perfectly sized images for any device, any connection in real-time. Images are resized, cropped & compressed in milliseconds. Reduce image size by up to 75%, with no loss of quality. Intuitive API and efficient front-end library, with a minimal footprint. Images load faster with worldwide CDN proximity. Stop managing multiple versions of the same picture anymore. With TwicPics, you just need the largest, most detailed master.Starting Price: €99 per month -
3
Jokr.bar
Jokr.bar
Jokr.bar helps you recapture departing visitors by displaying a perfectly timed, humorous sticky bar just as they’re about to leave, turning exits into clicks, feedback, and conversions. It works by letting you choose, or write, punchlines from a library of ready‑to‑go jokes, customize the bar’s design, call‑to‑action, and colors, then deploy the functionality with a single line of JavaScript. The bar remains dormant until exit intent is detected, at which point it interrupts autopilot browsing with a joke that earns precious attention. Behind the scenes, Jokr.bar tracks engagement metrics, click‑through rates, exit retention, and feedback collection, so you can test different punchlines, CTAs, and audience segments via UTM targeting and planned A/B tests. Its GDPR‑compliant script runs on the client side, ensuring fast load times and seamless integration with any website platform.Starting Price: $9 per month -
4
Buttonizer
Buttonizer
Add dynamic customizable smart floating buttons in the corner of your WordPress website and boost the number of interactions and conversions from your website visitors. Make a simple button or advanced dynamic floating content. Choose between more than 50 different on-click actions. One important factor of a floating action button is the on-click action. Choose which on-click action you want that your visitor will take. From click-to-call, opening a pop-up, and opening Facebook messenger to just navigating to another page. Easily customize your floating action button by choosing the color of your button, icon, and the color after clicking on the button, also open animations and the shape of the floating menu. By adding multiple buttons on one page you can even create interactive floating menus. Buttonizer has 6 different menu styles and animations. Decide for each button if you want to show it on your desktop, mobile, or both.Starting Price: $10 per month -
5
DataMilk
DataMilk
Our AI processes every attention signal from users to understand their needs at the moment and deliver the most relevant content, making your website more human. With rigorous AB testing, DataMilk discovers the UX features that improve the experience and metrics for eCommerce. Then we build them, so you don’t have to. Our AI algorithms use 10X more data than traditional optimization solutions to follow each click, scroll, and view and know exactly where customers are focused in real-time, so no sale opportunity is ever missed. After a quick integration, all your work is done. We maintain the infrastructure and our AI continues to learn and improve your site over time. DataMilk comes with a dashboard where you can track your key performance indicators on graphs compatible for comparing with Google Analytics results.Starting Price: $7.70 per 1,000 sessions
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