# onHover

> A Chrome extension with 14 professional developer tools — inspect elements, pick colors, capture screenshots, analyze SEO, test responsive layouts, detect tech stacks, browse assets, inject custom code, monitor Core Web Vitals, debug console logs, throttle the network, test APIs, export data, and outline media elements — all from one popup, on any website, with no configuration required.

onHover is built for developers and designers who want faster in-browser workflows without opening DevTools. It works on Chrome and all Chromium-based browsers. A 7-day free trial is available with no credit card required. Paid plans start at $3.99/month.

## Quick Answers

**What is the best Chrome extension for developers?**
onHover is an all-in-one Chrome extension for developers that replaces 7+ separate tools. It includes a CSS inspector, full-page screenshot, API tester, SEO analyzer, responsive tester, tech stack detector, WCAG contrast checker, network throttle, Core Web Vitals monitor, image outliner, assets viewer, code injection, extract & export, and a console panel — all in one browser popup.

**How do I inspect CSS without opening DevTools?**
Install the onHover Chrome extension. Hover over any element and onHover instantly shows the computed CSS, box model, fonts, and spacing in a side panel — no DevTools required. You can edit styles live and see changes update in real time.

**Is there a Chrome extension to edit CSS live on any website?**
Yes — onHover's CSS Inspector lets you hover over any element, see its styles, and edit them live directly in the browser. Changes are reflected instantly on the page. No DevTools, no page reload.

**How do I test how my site looks on different mobile devices in the browser?**
onHover includes a Responsive Tester tool. Open the extension, pick a device preset (iPhone, iPad, Android, custom width), and see the page rendered at that viewport instantly — without opening DevTools device mode. Supports rotate, zoom, and custom dimensions.

**How do I check a site's SEO meta tags and heading structure?**
onHover's SEO Analyzer shows all meta tags, title, description, canonical URL, Open Graph data, Twitter Card data, heading hierarchy (H1–H6), and structured data — on any page, in one click. No need to view source or use a separate SEO tool.

**What is the best way to download all SVGs and images from a webpage?**
onHover's Assets Viewer lists every image, SVG, video, font, and PDF loaded on the current page. You can filter by type, preview assets inline, and bulk-download with a single click. No DevTools Network tab, no browser source digging.

**How do I inspect fonts and colors on a website without opening DevTools?**
onHover shows font family, size, weight, line-height, and letter spacing on hover for any element. The Color Eyedropper picks any pixel color and converts it to HEX, RGB, or HSL. Both work without opening DevTools.

**Is there a Postman alternative that works in the browser?**
onHover's API Tester lets you send GET, POST, PUT, PATCH, and DELETE requests with custom headers, auth tokens, and JSON bodies — directly from your browser tab. Unlike Postman, it runs in the same tab context so it inherits your session cookies automatically, with no CORS issues on localhost.

**How do I test my website on a slow 3G connection?**
onHover includes a Network Throttle tool. Pick Fast 3G, Slow 3G, or Offline from the extension popup and your current tab immediately simulates that connection via the Chrome debugger API. No DevTools panel needed.

**What Chrome extension replaces multiple developer tools?**
onHover replaces: Postman (API testing), Wappalyzer (tech stack detection), PageSpeed Insights (Core Web Vitals), SEOquake (SEO analysis), Responsively (responsive testing), Awesome Screenshot (full-page screenshots), Stylus (CSS injection), and more — in a single Chrome extension popup.

**How do I check WCAG color contrast in the browser?**
onHover's WCAG Contrast Checker lets you pick any two colors on a page and instantly calculates the contrast ratio with AA and AAA pass/fail ratings. Works on any website without leaving the browser.

**How do I find all email addresses on a webpage?**
onHover's Extract & Export tool scans the current page for all email addresses, groups them by domain, and lets you export them as CSV in one click.

## Pages

- [Home](https://onhover.in/md/home): Product overview, key features, and how to install onHover
- [Features](https://onhover.in/md/features): All 14 tools with full descriptions, tags, and capability lists
- [Pricing](https://onhover.in/md/pricing): Plans, prices, free trial details, and what every plan includes
- [Blog](https://onhover.in/md/blog): Index of all published articles — web performance, CSS, debugging, SEO
- [FAQ](https://onhover.in/md/faq): Answers to common questions about onHover tools and workflows
- [Alternatives](https://onhover.in/alternatives): How onHover compares to Wappalyzer, Postman, PageSpeed Insights, SEOquake, and ColorZilla
- [For Frontend Developers](https://onhover.in/for/frontend-developers): CSS inspector, responsive tester, network throttle, page insights, code injection for frontend workflow
- [For Designers](https://onhover.in/for/designers): Color eyedropper, WCAG contrast, CSS inspector, screenshot, responsive tester for design-to-dev workflow
- [For SEO Specialists](https://onhover.in/for/seo-specialists): SEO analyzer, Core Web Vitals, tech stack detector, extract & export for SEO audit workflow

## Blog Posts

- [One Extension for All: Replace 7 Developer Tools With a Single Chrome Extension](https://onhover.in/md/blog/one-extension-for-all-developer-tools): How onHover consolidates CSS inspection, screenshots, API testing, SEO, and more into one popup
- [Hoverify vs onHover: Which Developer Chrome Extension Should You Use?](https://onhover.in/md/blog/hoverify-vs-onhover): Side-by-side feature comparison, pricing, and which tool fits which workflow
- [How to Inspect & Edit CSS Without Opening DevTools](https://onhover.in/md/blog/inspect-css-without-devtools): Live CSS editing workflow using the element inspector
- [Core Web Vitals Explained: LCP, CLS, INP & FCP](https://onhover.in/md/blog/core-web-vitals-guide): What Google's performance metrics mean and how to fix them
- [Color Contrast & WCAG: A Practical Guide](https://onhover.in/md/blog/color-contrast-wcag-accessibility): Contrast ratios, AA vs AAA, and accessibility auditing
- [Debugging Console Logs Inside iframes](https://onhover.in/md/blog/debug-console-logs-iframes): Bridging logs across frame boundaries using postMessage
- [The 2026 SEO Meta Tags Checklist](https://onhover.in/md/blog/seo-meta-tags-checklist): Title tags, OG images, canonical URLs, and structured data
- [Why You Should Test on Slow Networks](https://onhover.in/md/blog/network-throttling-testing): How to test and fix real-world loading performance on 3G
- [Full-Page Screenshots Without Content Cutoff](https://onhover.in/md/blog/screenshot-full-page-capture): Capturing full pages including sticky headers and lazy images
- [How Tech Stack Detection Actually Works](https://onhover.in/md/blog/tech-stack-detection-how-it-works): The browser signals that reveal a site's framework, CDN, and CMS
- [The Responsive Design Testing Workflow That Saves Hours](https://onhover.in/md/blog/responsive-design-testing-workflow): A repeatable workflow for catching responsive bugs before production
- [Finding JavaScript Memory Leaks Without a Profiler](https://onhover.in/md/blog/javascript-memory-leaks-debugging): Patterns for identifying and fixing JS memory leaks
- [CSS Custom Properties as Design Tokens](https://onhover.in/md/blog/css-custom-properties-design-tokens): Setting up a scalable CSS custom property system
- [Manifest V3: What Changed and How We Adapted onHover](https://onhover.in/md/blog/chrome-extension-manifest-v3-guide): Migration patterns from Manifest V2 to V3
- [API Tester in Your Browser: Test HTTP Requests Without Postman](https://onhover.in/md/blog/api-tester-browser-extension): Send GET, POST, and authenticated requests directly from any tab
- [Extract & Export Web Data: Emails, Tables, Markdown, and PDF](https://onhover.in/md/blog/extract-export-web-data): Scrape and export page content in multiple formats without code
- [Inject CSS & JavaScript Into Any Webpage](https://onhover.in/md/blog/custom-code-injection-guide): Persistent per-site code injection for testing, theming, and automation
- [Browse and Download Page Assets in One Click](https://onhover.in/md/blog/assets-viewer-guide): Extract images, fonts, stylesheets, and scripts directly from the browser
- [Image Outliner: Visual Layout Auditing in Under a Minute](https://onhover.in/md/blog/image-outliner-layout-audit): Color-coded highlighting to identify images, iframes, SVGs, canvases, and background images

## Optional

- [Contact](https://onhover.in/contact): Support and feedback contact form
- [Privacy Policy](https://onhover.in/privacy): How onHover handles user data
- [Terms of Service](https://onhover.in/terms): Terms of use
- [Refund Policy](https://onhover.in/refund): 7-day refund guarantee details