DevToolkit - All your developer tools, one click away

DevToolkit, 18+ developer tools in one click, screenshot, CSS inspector, SEO audit, responsive, cookie editor, font detector & more.

DevToolkit - All your developer tools, one click away A browser extension built for web developers, designers, and digital agencies. DevToolkit brings 18+ essential tools into a single popup — no new tabs, no logins, no juggling multiple extensions. 🏆 Everything You Need, Right in Your Browser DevToolkit replaces a drawer full of separate tools with one lightweight extension that opens in a single click. Free tools for everyday work, and a Pro upgrade for specialist workflows. 📸 Full Page Screenshot Capture complete full-page screenshots of any website. Export as PNG or JPEG with custom scale, optional fixed element hiding, and custom filename templates. 🎨 Color Picker Sample any color from any webpage and copy instantly as HEX, RGB, HSL, or HSV. Includes color history and one-click copy for any format. 🔍 CSS Inspector Hover over any element to inspect its full computed CSS — box model, typography, colors, flexbox, grid, and effects. Includes a Complete CSS tab to copy the entire CSS block in one click. 📦 Asset Downloader Discover and download all images on a page including lazy-loaded assets. Filter by size and type, then download individually or in bulk. 🐛 Debug Panel Clear cache, localStorage, sessionStorage, and IndexedDB with one click. Inject custom CSS or JavaScript for instant testing. Includes an image performance auditor. 🔎 SEO Audit Instant on-page SEO report covering meta title and description, heading structure (H1–H6), canonical URL, robots meta, Open Graph, Twitter Card, structured data, image alt texts, internal and external links, and Core Web Vitals signals. 🧱 Sitestack — Technology Detector Identify the CMS, frontend framework, CDN, hosting provider, analytics tools, and SSL status of any website. Invaluable for competitive research and pre-sales discovery. ⏰ Task Reminders Built-in task manager with scheduled desktop notifications. Reminders fire even when the popup is closed. 🔒 Pro Features: 📐 Responsive Preview View any website in live, interactive iframes at Mobile, Tablet, and Desktop breakpoints side by side. Add custom device sizes, rotate portrait/landscape, sync scroll across frames. 🔤 Font Detector & Downloader Discover every font actively rendering on a page — Google Fonts, custom fonts, and system fonts. Download font files directly from the extension. 📧 Email Finder Extract all publicly visible email addresses from any page. Deep scan mode checks /contact, /about, /team, and other sub-pages. Export as CSV or plain text. 🍪 Cookie Editor Full cookie management: view, create, edit, and delete cookies with all attributes. Import and export in JSON, Netscape, or HTTP Header format. 🚫 Element Remover Hide, remove, or blur any element on any page — banners, popups, cookie notices, navigation. CSS selector targeting, undo stack, and export hidden element rules as a CSS file. 📋 Content Extractor Extract text, links, images, headings, tables, meta data, or any custom CSS selector from any page. Export as JSON, CSV, or plain text. 🖼️ Mockup Generator Turn any webpage screenshot into a polished device mockup for client presentations and portfolios. Five presentation styles with background options and PNG export. 📏 Ruler & Measurement Measure any element or distance on any page with pixel precision. Four measurement modes: Line, Box, Element, and Distance. 🔗 Open Links in New Tabs Scan, filter, and preview all links on a page, then open them in new tabs at once. Includes scope filters, delay between tabs, and a confirmation step before opening. ✂️ Easy Copy Click any link, button, dropdown, or navigation item to copy its text without triggering navigation. Includes hover mode, copy history, and URL copy on right-click. ✅ Why Choose DevToolkit 👉 18+ tools in a single popup — no tab switching 👉 Free tools available without any account or payment 👉 Pro upgrade is a one-time payment with no subscription 👉 All processing runs locally — no data collected or transmitted 👉 Built on Chrome Manifest V3 — modern, secure, and future-proof 👉 Works on Chrome and Microsoft Edge 🎯 Built For 👉 Frontend developers inspecting, debugging, and auditing websites 👉 Designers working with layouts, colors, typography, and spacing 👉 SEO professionals reviewing page structure and on-page signals 👉 Freelancers and agencies managing client websites 👉 Anyone who wants a faster, cleaner development workflow 💬 Frequently Asked Questions Is DevToolkit free? DevToolkit has a permanently free tier with 8 tools available at no cost, no account required. A one-time Pro upgrade unlocks 10+ additional specialist tools. Does it work on all websites? DevToolkit works on the vast majority of modern websites. Some tools that require script injection may not function on sites with strict Content Security Policies, such as certain banking or high-security platforms. Is my data safe? Yes. DevToolkit does not collect, transmit, or sell any personal data. All tools run entirely inside your browser. No account or sign-in is ever required for any feature. How do I activate Pro? After purchase you receive a licence key by email. Enter it in DevToolkit → Settings → Licence and click Activate. Pro features unlock instantly.