Developer Tools extensions

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.

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

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

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

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

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.

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

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.

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.

Gloc sends GitHub repository page telemetry to the developer's Umami endpoint.

Mouse Gesture lets page events trigger its all-sites content script to close the current tab.

Salesforce Log Inspector reads your Salesforce sid cookie to fetch selected Apex debug logs from Salesforce.

Web Screenshot captures screenshots from user-selected tabs or desktops and saves them locally.

Shows the font families and color schemes used on a web page.

Analysis SEO & Website Checker - PR-CY sends the active tab hostname to s.pr-cy.ru when its popup opens.

ChatGPT to Markdown converts visible ChatGPT conversations into Markdown for clipboard copying or local download.

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

Next.js Explorer captures Next.js page data from active tabs and stores it locally for inspection.

Qualys Browser Recorder captures form values and page actions from all sites while recorder mode is active.

Appsheet Translate sends AppSheet page text and visible input values to Google Translate when translation is enabled.

Free Route Planner for Google Maps sends your Chrome profile email and route stops to Zeo Route Planner.

Pretty Js sends selected page text to linangdata.com when you use its context-menu formatter.

Spark SEO by seoClarity lets any web page trigger seoClarity API requests for the current tab URL with the stored token.

Anti-CORS, anti-CSP lets a clicked site bypass CORS and CSP browser restrictions.

Localhost Open Graph Debugger sends the active page's meta tags and preview images to og.nullnull.dev when you click Submit.

Meteor DevTools Evolved lets any webpage ask the extension to open an arbitrary URL in a new browser tab.

Mockiato lets web pages query stored header profiles and mocks through its messaging bridge.

TestMu AI sends page URLs to LambdaTest when users start screenshot or realtime browser tests.

view xml file | XML Formatter lets page scripts open an extension tab with detected XML content.

HedNet Protocol Extension fetches your public IP address from api.ipify.org while its popup is open.

HypeStat Analyzer sends the active tab hostname to hypestat.com when you open its popup.

Peek - Design & Asset Toolkit sends active tab URLs and persistent analytics IDs to peek-extension-proxy.netlify.app when enabled.

Redirect Check sends user-selected page links to its Cloud Functions redirect checker.

Web to MCP uploads the current page URL, DOM HTML, token count, and screenshot to web-to-mcp.com after popup capture.

Window Resizer sends open-tab URLs to Google's favicon service when its popup displays saved tabs.

eCommerce Profit Calculator injects a jsDelivr stylesheet into every page you visit.

Grips sends visited domains to a CloudFront endpoint and posts active-tab page views to Google Analytics on extension clicks.

Inspect Element creates a persistent Amplitude ID and sends usage telemetry to api.amplitude.com.

Nocodable lets its web app request Facebook tracking identifiers and page context from Bubble editor pages.

NsLookup - Find DNS Records opens nslookup.io with the active tab's hostname when you click its toolbar button.

The extension sends active-tab URL, page title, headings, and extracted page text to backend.onpageseo.ai for AI metadata generation.

Rayst - Reveal the web loads ray.st resources on visited pages and sends the current URL to app.ray.st when its panel opens.

Udemy Course Auto Completion injects code into the active Udemy tab to mark lectures complete and submit course answers.

Agency Dashboard SEO Extension sends the current site's domain to APILayer and WhatCMS from its popup tools.

Cloudinary Media Inspector stores request and response headers for visited pages for local inspection.

Data Studio Companion loads a Google Fonts stylesheet into Looker Studio pages when obfuscation mode is enabled.

Geometric Structures sends new-tab searches with persistent IDs and displayed bookmark URLs to external services.

HTML Validator sends inspected page HTML to validator.w3.org when you request online validation.

Shows a quick overview of Google Analytics tracking activity on the current page.

On Page SEO Checker reads URL, metadata, headings, links, images, and structured data from pages when its side panel opens.

Open TortoiseSVN for Google Chrome sends matching link URLs from broad page clicks to its native TortoiseSVN host.

PACify | The Proxy Manager fetches user-configured PAC files and applies them to Chrome proxy settings.

Potato Extension for Webflow sends selected Webflow asset URLs to api.flowchef.co for AI alt-text generation.

Quantcast - Tag Inspector sends detected Quantcast pixel pcodes and the active tab domain to Quantcast APIs.