# Hoverify > Hoverify is a browser extension for Chrome, Edge, Brave and Firefox that puts nine web development tools in one place: a CSS inspector, responsive testing, screenshots, asset extraction, a color eyedropper, SEO and AI-readiness audits, tech stack detection and debug utilities. One license covers every tool, runs in 3 browsers at a time, and nothing auto-renews. Used by 26,000+ developers. The site is built with Astro and served as static pages, so the content an AI crawler fetches is the same content a visitor sees. ## Extension tools - [CSS Inspector](https://tryhoverify.com/inspector/): Hover any element to see its HTML and source CSS, then edit or copy the styles without opening DevTools. - [Responsive Viewer](https://tryhoverify.com/responsive-viewer/): Opens a site on 34 device presets at once, foldables included, and syncs scroll, clicks and typing across them. 28 of the presets have device frames, and the page sits inside Safari or Chrome bars. Page scripts see each device's screen size and orientation. In Chromium browsers, with a phone or tablet user agent (the default), the mouse also emulates touch. Works on sites that block iframes. - [Screenshot](https://tryhoverify.com/screenshot/): Captures the full page, the viewport, an area or one element, with a built-in editor for annotating and blurring. - [Asset Downloader](https://tryhoverify.com/assets/): Pulls images, SVGs, videos, PDFs and Lottie files from any website, iframes and CSS backgrounds included. - [Color Eyedropper](https://tryhoverify.com/color-eyedropper/): Picks a color anywhere on a page, images and iframes included. Copies HEX, RGB and OKLCH, or converts to HSL and CMYK. - [SEO Checker](https://tryhoverify.com/seo-checker/): Runs a full on-page SEO audit from the page you're on: Core Web Vitals, meta tags, headings, images, links and schema, exportable as a PDF report. - [GEO Checker](https://tryhoverify.com/geo-checker/): Scores a page's AI readiness across 16 weighted categories, including llms.txt and AI crawler rules. - [Site Stack](https://tryhoverify.com/site-stack/): Shows what a website is built with: frameworks, CMS, analytics and plugins with confidence scores, plus hosting, DNS and SSL details. - [Accessibility Checker](https://tryhoverify.com/accessibility-checker/): Runs an axe-core WCAG audit on any page, including staging behind a login. Contrast failures come with a suggested fix. - [Optimize Images](https://tryhoverify.com/optimize-images/): Re-encodes the images a page loaded as WebP, JPEG or PNG at the quality you choose, and saves the lot as a ZIP. - [Debug](https://tryhoverify.com/debug/): Clears cache, cookies and local storage for one site or all of them, with Chrome honoring time ranges. - [Custom Code](https://tryhoverify.com/custom-code/): Injects CSS or JavaScript snippets that re-apply on every visit to the sites you name, with live preview as you type. ## Browsers and pricing - [Hoverify for Chrome](https://tryhoverify.com/chrome/): The Chrome extension, which also installs on Edge and Brave. - [Hoverify for Firefox](https://tryhoverify.com/firefox/): The Firefox add-on with the same nine tools. - [Pricing](https://tryhoverify.com/pricing/): One license for every tool, volume discounts for teams, and a 14-day refund policy instead of a trial. ## Comparisons - [Hoverify vs CSS Peeper](https://tryhoverify.com/compare/hoverify-vs-css-peeper/): Where a single-purpose CSS viewer wins and where it runs out. - [Hoverify vs GoFullPage](https://tryhoverify.com/compare/hoverify-vs-gofullpage/): Full-page screenshots against the wider toolset. - [Hoverify vs Responsively](https://tryhoverify.com/compare/hoverify-vs-responsively/): A responsive testing desktop app against an in-browser extension. - [Hoverify vs Wappalyzer](https://tryhoverify.com/compare/hoverify-vs-wappalyzer/): Tech stack detection compared feature by feature. ## Free tools - [Device mockup generator](https://tryhoverify.com/tools/device-frames/): Puts a screenshot into a frame for any of 28 phones, foldables and tablets, then downloads a PNG. The iPhone Duo, Galaxy Z Fold7 and Pixel 10 Pro Fold each have a closed and an open frame, 31 frames in all. Each frame is also downloadable on its own as a transparent WebP or PNG, and each device has a page with its viewport, cutout, status bar and finishes: - [iPhone Duo](https://tryhoverify.com/tools/device-frames/iphone-duo/): 466×678 CSS px viewport. - [iPhone 18 Pro Max](https://tryhoverify.com/tools/device-frames/iphone-18-pro-max/): 440×956 CSS px viewport. - [iPhone 18 Pro](https://tryhoverify.com/tools/device-frames/iphone-18-pro/): 402×874 CSS px viewport. - [iPhone 17 Pro Max](https://tryhoverify.com/tools/device-frames/iphone-17-pro-max/): 440×956 CSS px viewport. - [iPhone 17 Pro](https://tryhoverify.com/tools/device-frames/iphone-17-pro/): 402×874 CSS px viewport. - [iPhone 17](https://tryhoverify.com/tools/device-frames/iphone-17/): 402×874 CSS px viewport. - [iPhone Air](https://tryhoverify.com/tools/device-frames/iphone-air/): 420×912 CSS px viewport. - [iPhone 17e](https://tryhoverify.com/tools/device-frames/iphone-17e/): 390×844 CSS px viewport. - [iPhone 16](https://tryhoverify.com/tools/device-frames/iphone-16/): 393×852 CSS px viewport. - [iPhone 16 Plus](https://tryhoverify.com/tools/device-frames/iphone-16-plus/): 430×932 CSS px viewport. - [iPhone SE (3rd generation)](https://tryhoverify.com/tools/device-frames/iphone-se-3/): 375×667 CSS px viewport. - [Galaxy S26 Ultra](https://tryhoverify.com/tools/device-frames/galaxy-s26-ultra/): 384×832 CSS px viewport. - [Galaxy S26](https://tryhoverify.com/tools/device-frames/galaxy-s26/): 360×780 CSS px viewport. - [Galaxy A17 5G](https://tryhoverify.com/tools/device-frames/galaxy-a17-5g/): 384×832 CSS px viewport. - [Galaxy A07](https://tryhoverify.com/tools/device-frames/galaxy-a07/): 384×854 CSS px viewport. - [Pixel 11](https://tryhoverify.com/tools/device-frames/pixel-11/): 412×924 CSS px viewport. - [Pixel 11 Pro XL](https://tryhoverify.com/tools/device-frames/pixel-11-pro-xl/): 448×998 CSS px viewport. - [Redmi Note 14 4G](https://tryhoverify.com/tools/device-frames/redmi-note-14-4g/): 393×873 CSS px viewport. - [Moto G Power (2025)](https://tryhoverify.com/tools/device-frames/moto-g-power-2025/): 444×980 CSS px viewport. - [Galaxy Z Fold7](https://tryhoverify.com/tools/device-frames/galaxy-z-fold7/): 412×960 CSS px viewport. - [Galaxy Z Flip8](https://tryhoverify.com/tools/device-frames/galaxy-z-flip8/): 412×960 CSS px viewport. - [Pixel 10 Pro Fold](https://tryhoverify.com/tools/device-frames/pixel-10-pro-fold/): 444×970 CSS px viewport. - [iPad Pro 13" (M5)](https://tryhoverify.com/tools/device-frames/ipad-pro-13-m5/): 1032×1376 CSS px viewport. - [iPad Pro 11" (M5)](https://tryhoverify.com/tools/device-frames/ipad-pro-11-m5/): 834×1210 CSS px viewport. - [iPad Air 13" (M4)](https://tryhoverify.com/tools/device-frames/ipad-air-13-m4/): 1024×1366 CSS px viewport. - [iPad (A16)](https://tryhoverify.com/tools/device-frames/ipad-a16/): 820×1180 CSS px viewport. - [iPad mini (A17 Pro)](https://tryhoverify.com/tools/device-frames/ipad-mini-a17-pro/): 744×1133 CSS px viewport. - [Galaxy Tab S11](https://tryhoverify.com/tools/device-frames/galaxy-tab-s11/): 800×1280 CSS px viewport. - [Device frames license](https://tryhoverify.com/tools/device-frames/license/): The frames and exported mockups are free for personal and commercial work, and credit is optional. The frame files can't be resold, redistributed or built into another mockup tool. - [Color picker from image](https://tryhoverify.com/tools/color-eyedropper/): Upload an image and pick colors from it in the browser. - [Color picker](https://tryhoverify.com/tools/color-picker/): HEX, RGB and HSL values with conversion. - [CSS gradients](https://tryhoverify.com/tools/beautiful-css-gradients/): A curated collection of copy-ready CSS gradients. - [Image to mesh gradient](https://tryhoverify.com/tools/image-to-mesh-gradient/): Generates a mesh gradient from an uploaded image. - [Tailwind v3 to v4 converter](https://tryhoverify.com/tools/tailwind-v4-converter/): Converts a v3 config to the v4 CSS-first format. ## Optional - [Blog](https://tryhoverify.com/blog/): Guides on CSS debugging, responsive testing, browser extensions and SEO. - [Changelog](https://tryhoverify.com/changelog/): Release notes for the extension. - [About the author](https://tryhoverify.com/author/himanshu-mishra/): Who writes and maintains the site. - [Vidferry](https://tryhoverify.com/vidferry/): A separate desktop video downloader for Mac and Windows, free with a Hoverify license. - [Privacy policy](https://tryhoverify.com/privacy/): What the site and extension collect.