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⚡ The All-in-One Developer Toolkit for Chrome

25+ Developer Tools in One Chrome Extension

Developer tools chrome extension for web developers, designers, SEO experts, and agencies. DevToolkit combines 25+ powerful browser tools into one lightweight extension.

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Why Developers Choose This Developer Tools Chrome Extension

DevToolkit is a developer tools chrome extension designed to simplify your workflow with powerful utilities for development, design, debugging, SEO, and productivity — all accessible from one lightweight extension without switching tabs or installing multiple tools.

All-in-One Workflow

Replace dozens of browser extensions with one clean and organized toolkit. Access screenshots, CSS inspection, responsive previews, SEO tools, debugging utilities, and more from a single popup.

Privacy & Performance First

This developer tools chrome extension runs locally inside your browser with no server calls, no tracking, and no unnecessary background processes. Fast, lightweight, and built for daily use.

Built for Modern Developers

Designed for developers, designers, freelancers, and agencies who want faster workflows without clutter. DevToolkit is built on Manifest V3 for long-term Chrome compatibility and performance.

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developer tools chrome extension

25+ Tools. One Click. Zero Workflow Interruption.

Unlike traditional browser utilities, this developer tools chrome extension is designed to work without leaving your current tab, opening DevTools, or disrupting your workflow. Open the popup, access the tool you need, close it, and continue building without interruption.

Works on any website

No site permissions needed for basic tools. Works on WordPress, Shopify, React apps, static sites, everything.

Lightning-fast popup

Enable only the tools you use in Settings → Features. Fewer tools = faster load time. Your popup, your way.

Zero data collection

All tools run entirely in your browser. No data leaves your machine. No accounts, no tracking, no analytics on your usage.

Works on Chrome and Edge

Full Manifest V3 compliance. Passes Chrome Web Store security review.

Actively maintained

Regular updates with new tools added every quarter. Built by developers, for developers.

Why DevToolkit is the Best Developer Tools Chrome Extension

Most developer tools chrome extension users rely on multiple separate utilities like CSS Scan, Hoverify, responsive viewers, cookie managers, and font inspectors — each with its own subscription, browser tab, and renewal cost. DevToolkit replaces all of them with a one-time payment and gives you instant access to everything in one click directly inside your browser. Every tool runs entirely within Chrome — no server calls, no usage tracking, no account required, and no data leaving your machine. Built on Chrome’s latest Manifest V3 architecture, this developer tools chrome extension passed modern Web Store security requirements and is designed to remain stable as Chrome evolves, unlike many older extensions that stopped working after the MV2 shutdown.

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developer tools chrome extension

Powerful Tools That Cost You Nothing

Unlike many tools that lock essential features behind subscriptions, this developer tools chrome extension offers a genuinely useful free tier that thousands of developers can use daily. DevToolkit was built on the belief that powerful developer tools should be accessible to everyone, whether you’re a freelancer, agency, student, or full-time developer.

Full-Page Screenshot

Capture pixel-perfect full-page screenshots of any website in PNG or JPEG format. Set custom scale (1×, 1.5×, 2×), hide fixed elements like sticky headers and cookie banners, and download with a custom filename template. Perfect for client presentations, documentation, and design reviews.

Color Picker

Click any pixel on any webpage and instantly capture its colour in HEX, RGB, HSL, and HSV formats. Browse your full colour history, copy any format with one click, and build colour palettes as you browse. Essential for every designer who's ever eyedropped a colour from a screenshot.

CSS Inspector

Hover over any element to see its complete computed CSS in a floating panel — box model, typography, colours, flexbox, grid, effects, and borders. Two tabs: Properties (organised by category) and Complete CSS (copy the full CSS block with one click). No DevTools, no right-click, no context switching.

Asset Downloader

Discover and download every image on the current page in one place. Filter by size, type (PNG, JPG, SVG, WebP), and minimum dimensions. Select all or pick individual assets. Saves hours on client work where you need to recover images from a live site.

Debug Panel

Clear cache, localStorage, sessionStorage, and IndexedDB with one click. Inject custom CSS or JavaScript into any page for instant testing. Run performance audits on image sizes. Essential for developers testing sites they don't own.

SEO Auditor

Instant SEO health check for any page: title tag (length + keyword presence), meta description, heading hierarchy (H1–H6), canonical URL, robots meta, Open Graph tags, Twitter Card, structured data, image alt texts, internal/external link analysis, and Core Web Vitals. One-click report, zero configuration.

Sitestack Detector

Identify the technology stack powering any website — CMS (WordPress, Shopify, Webflow, Wix), frontend frameworks (React, Vue, Next.js), analytics tools, CDNs, hosting providers, SSL status, and server software. Invaluable for competitive research and pre-sales discovery.

Task Reminders

A lightweight task manager built directly into the extension. Set timed reminders for dev tasks, QA items, and client follow-ups without leaving your browser. Scheduled desktop notifications keep you on track without a separate app

Edit Mode

Edit website text instantly right on the page without opening developer tools. Perfect for quick mockups, content previews, and client demonstrations.

Site Lock

Lock selected websites behind a password screen to prevent direct access from your browser. Perfect for privacy, focus, parental control, or restricting casual access on shared devices.

String Tools

Transform and format text instantly with tools for uppercase, lowercase, camelCase, snake_case, kebab-case, trimming, reversing, slug generation, duplicate removal, and other common string operations used in daily development.

Wellness Breaks

Stay healthy during long coding sessions with science-backed wellness reminders for eye care, posture, movement, hydration, and focus. Get smart desktop notifications and healthy screen habit tips directly inside your browser.

The Pro Tools That Separate Good Developers from Great Ones

This developer tools chrome extension also includes DevToolkit Pro, which adds 8 advanced specialist tools built for professional developers, designers, and agencies who need more power, precision, and efficiency in their daily workflow.

Responsive View Checker - DevToolkit

Responsive Preview

View any website in responsive layouts with live Mobile, Tablet, and Desktop previews displayed side by side. Interact with the site, scroll through pages, test navigation, and compare layouts in real time. Choose from preset screen sizes or enter your own, rotate device orientation, and sync scrolling for an effortless responsive testing experience.

Font Downloader - DevToolkit

Font Detector & Downloader

Discover every font actually used on a webpage, complete with live previews, available weight variants, font categories, and source information. Browse Google Fonts, custom fonts, and system fonts in one place, then download supported font files or export them for use in your own projects.

Email Finder - DevToolkit

Email Finder

Extract publicly visible email addresses from any website with a fast Page Scan or a more comprehensive Deep Scan. Organize results by category, including Info, Support, Sales, Press, and Careers, then export them as CSV or TXT files, or copy everything to your clipboard for quick use.

Cookie Editor - DevToolkit

Cookie Editor

Manage all cookies for the current website in one place. View, search, edit, add, or delete individual cookies, filter them by common attributes, and clear all site cookies with a single click. Import and export cookies in multiple formats, making it easy to back up, restore, or transfer them whenever needed.

Element Remover - DevToolkit

Element Remover

Customize any webpage by hiding, removing, or blurring unwanted elements with a single click. Target individual items or entire sections, quickly hide images, popups, ads, or fixed elements, and restore changes at any time. Save your customizations and export them as reusable CSS rules for future use.

Mockup Generator - DevToolkit

Mockup Generator

Transform any website screenshot into a professional device mockup for portfolios, presentations, and case studies. Choose from multiple presentation styles and background options, add customizable captions, adjust the screenshot position, and export a high-resolution image ready to share.

Ruler - DevToolkit

Ruler & Measurement Tool

Measure distances, element sizes, and spacing on any webpage with precision. Use multiple measurement modes to inspect layouts, compare gaps between elements, and capture exact dimensions, making design reviews and front-end development faster and more accurate.

Content - DevToolkit

Content Extractor

Extract text, links, images, headings, tables, and metadata from any page. Use custom CSS selectors to pull exactly what you need, quickly and accurately.

Perfect for scraping, audits, and content analysis without manual effort.

Open Links Into New tab - DevToolkit

Open Links in New Tabs

Scan all links on a page, filter them, and open multiple links in new tabs at once. Perfect for research, audits, and bulk browsing.

Save time by handling large sets of links in a single click.

Easy Copy - DevToolkit

Easy Copy

Copy anything instantly without triggering navigation. Click links, buttons, dropdowns, menus, or hard-to-select text and get clean copy in one click.

Ideal for quickly grabbing content without breaking your workflow.

Dev Formatter

Dev Formatter

10 developer utilities in one lightweight panel, including JSON formatting, Base64 tools, JWT decoding, URL encoding, timestamp conversion, UUID generation, hash generators, CSS formatting, and number base conversion — all processed locally inside your browser.

More Features coming soon - DevToolkit

More Features Coming Soon

We’re actively building new tools to make DevToolkit even more powerful and complete.

Stay updated as we continue to add features designed to save you time and simplify your workflow.

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More Tools:

Clear Browsing Data

Clear cache, cookies, history, and storage.

Meta Tags Preview

Preview Open Graph/Twitter card social sharing.

Table Capture

Export HTML tables to CSV, JSON, or Excel.

Code Injection

Inject JS, CSS, and HTML on any site per-domain.

Screenshot Editor

Edit, annotate and export screenshots with ease.

Enable/Disable Feature

Customize your toolkit with a single click.

Quick Admin Access

Jump to the CMS admin panel in one click.

Favorites Manager

Save your favorites tools at the top for quick access

Keyboard Shortkey

Access tools instantly with customizable keyboard shortcuts.

WordPress Detector

View WordPress version, theme, plugins, and website insights.

Images optimizations

View image SEO and optimization details instantly.

Encoder / Decoder

Encode and decode Base64, URL, Hex, hashes, and more.

Simple, Transparent Pricing. No Surprises.

No hidden renewals. No feature lock-ins after 30 days. No “free trial” that unexpectedly charges you. Choose the plan that works for you and enjoy full access with transparent pricing and ongoing updates.

🔥 Limited-Time 75% OFF • Use DEVKIT75 for Lifetime Access

Individual

$29/Lifetime

Perfect for solo developers and designers working on personal or client projects.

Including:

  • 1 Activation
  • Screenshot Editor
  • Responsive Preview
  • Font Detector & Downloader
  • Email Finder
  • Cookie Editor
  • Element Remover
  • Mockup Generator
  • Ruler & Measurement
  • Content Extractor
  • Open Links in New Tabs
  • Easy Copy
  • Dev Formatter
  • All Current & Future Pro Features
Buy Now
30-day money-back guarantee · Instant activation

⭐ Popular

Agency

$49/Lifetime

Built for freelancers, agencies, and small teams managing multiple devices.

Including:

  • 10 Activations
  • Screenshot Editor
  • Responsive Preview
  • Font Detector & Downloader
  • Email Finder
  • Cookie Editor
  • Element Remover
  • Mockup Generator
  • Ruler & Measurement
  • Content Extractor
  • Open Links in New Tabs
  • Easy Copy
  • Dev Formatter
  • All Current & Future Pro Features
Buy Now
30-day money-back guarantee · Instant activation

Unlimited

$99/Lifetime

The ultimate plan for professionals and businesses with unlimited device access.

Including:

  • Unlimited Activations
  • Screenshot Editor
  • Responsive Preview
  • Font Detector & Downloader
  • Email Finder
  • Cookie Editor
  • Element Remover
  • Mockup Generator
  • Ruler & Measurement
  • Content Extractor
  • Open Links in New Tabs
  • Easy Copy
  • Dev Formatter
  • All Current & Future Pro Features
Buy Now
30-day money-back guarantee · Instant activation

Real Developers. Real Workflows. Real Results.

I used to have CSS Scan, Responsive Viewer, and a separate cookie editor installed. DevToolkit replaced all three in one click. The CSS Inspector alone saves me 20 minutes a day on client work.

    James T.

    Senior Front-End Developer

    I recently tried this Chrome extension and I’m really impressed with its performance. Everything works smoothly and efficiently without any issues. The features are well designed and actually make the workflow easier and faster. Overall, it delivers exactly what it promises and provides a great user experience. Definitely a useful extension worth recommending.

      GPL Clean

      WordPress Developer

      The Responsive Preview is genuinely the best I've used — live, interactive iframes side by side. Not screenshots, not a device emulator. The actual site. My clients are always impressed when I show them mobile views in real time.

        Priya S.

        UI/UX Designer

        The Font Detector is brilliant. I audit competitor sites constantly and DevToolkit tells me exactly which fonts are rendering on screen, not just declared in CSS. The download button makes it even better.

          Marcus R.

          Creative Director, Digital Agency

          This extension is honestly amazing — a real lifesaver. It packs 8 useful functionalities into a single tool, which makes things so much easier. Everything I need is in one place, and it saves me a lot of time during development. Definitely a must-have for developers!

            Faisal S.

            WordPress Developer

            As an SEO consultant I look at dozens of sites a day. The SEO Auditor gives me a complete on-page picture in 3 seconds — title tags, meta, heading structure, OG, structured data, broken links. It's replaced my $50/month tool.

              Sarah K.

              SEO Consultant & Digital Strategist

              Frequently Asked Questions

              Yes. Pay once, use forever. No monthly fees, no annual renewals, no feature lock-outs after 12 months. All future Pro tools are included in your purchase.