Developer Tools extensions

DNS Checker sends each visited site's resolved IP address to dnschecker.org during navigation.

This extension lets users add, edit, delete, search, import, and export browser cookies.

GPT for Ecom fetches Etsy listing and shop pages from server-directed queues and uploads the page HTML to Alibaba OSS.

Shows related Google Ads API developer pages for the Google Ads page you are viewing.

This extension toggles images on or off for the current website.

Adds a Chrome DevTools pane for debugging Make scenarios and API calls.

Maven Tools for Salesforce reads Salesforce session cookies to call Salesforce APIs for its developer tools.

Mobile View injects a responsive-design overlay into web pages and stores device-selection preferences locally via chrome.storage.sync.

Modify, mock, record, and replay HTTP responses for web development testing.

Preview open graph data for the current page to see how links may appear when shared.

Quick source viewer reads the current page URL, HTML, scripts, and CSS when you open its source viewer.

Access Webflow components from the Relume Library directly inside the Webflow designer.

Measures page elements with draggable, resizable rulers and grid lines.

SnipCSS sends saved page snippets, including the source URL and selected HTML/CSS, to its backend.

Checks web designs for accessibility issues with tools for contrast, vision simulation, focus order, and more.

XPath Tester reads matching page text into its side panel when you evaluate an XPath.

svg-grabber reads SVG markup and the source page title and URL after you click its toolbar button.

ARIA DevTools loads Google-hosted Fira Code web fonts into pages when you activate its overlay.

This extension provides quick access to Adyen test payment details in the browser.

Allow CSP: Content-Security-Policy removes Content-Security-Policy headers from pages and frames when enabled.

AppstoreSpy for Play Store sends visible Google Play app IDs and locale to AppstoreSpy for analytics enrichment.

Best Proxy Switcher automatically disables other installed extensions that use proxy permissions.

Captures CSS selectors from page elements and highlights matching elements for copying.

Picks colors from the current screen and copies their hex values for reuse.

Manage Chrome cookies by adding, deleting, editing, searching, protecting, and blocking them.

Copy selected page content as Markdown from the right-click menu.

Core Web Vitals Visualizer sends the active page URL or origin to the Google Chrome UX Report API after a user request.

Dimensions Inspect | Gridman sends support messages, email addresses, and page paths to Amplitude analytics.

Essential SEO Toolkit opens the active tab URL in user-selected third-party SEO tools.

Exploratory Tester exposes per-page fetch and XHR URL logs to page scripts on sites where it runs.

Adds a GitHub dropdown for opening repositories in popular online IDEs.

GrowthBook DevTools lets any webpage overwrite its saved API host and API key through a postMessage bridge.

Compare HTML differences between browser tabs or paired production and development sites.

Heurio sends user-submitted bug notes, screenshots, page URL details, and DOM selectors to its Azure backend.

This extension provides quick browser access to IP, DNS, and hosted security testing tools.

Formats raw JSON into a readable, collapsible view with syntax highlighting.

Generates test automation locators and page objects from inspected web page elements.

Generates lorem ipsum text with saved preferred settings.

This extension provides a Markdown editor with live preview and one-click HTML conversion in Chrome.

Mokku exposes saved mock responses and header rules to any website through its page message bridge.

This extension overlays rulers and grids to help inspect and align web page layouts.

Pieces for Developers lets any website request stored Pieces identifiers and site history state through a page message bridge.

Overlay design images on webpages to compare layout, sizing, and alignment.

Plerdy SEO Analyzer accepts page messages that can replace its stored Plerdy token and send SEO audit data to Plerdy.

Manage and switch browser proxy configurations for different network environments.

Run Python snippets from webpages or in a browser-based Python editor.

Ranorex Selocity sends selected element details and screenshots to a local Ranorex Webtestit app over WebSocket.

Screenshot with URL - Full Page Screenshot captures page screenshots, URL/title details, optional logs, and local screen recordings.

This extension displays website data layers in a popup or DevTools panel for inspection.

Adds snap-to-content guides and measurement tools for pixel-perfect webpage layout work.

The QR Extension sends the active tab URL to dynamic QR shortening endpoints when the popup opens.

Twitch Username and User ID Translator sends submitted conversion input to usernametouserid.spiffy.dev.

Convert Unix timestamps and dates between epoch and human-readable formats.

Vue Telescope sends detected Vue page URLs to service.vuetelescope.com for public-site lookup.

Web Capture sends selected page HTML and computed styles to MagicPath's extraction API.

Edit and visualize website elements and content directly in the browser.