Developer Tools extensions

Generate and test XPath expressions directly on webpages with a movable toolbar.

Encodes and decodes selected text from the browser context menu.

Inspect font details on webpages, including size, weight, family, style, color, and spacing.

This extension shows key design, SEO, script, stylesheet, and image details for the current web page.

Monitors CPU, memory, network status, and Chrome tab/window counts from the browser toolbar.

Search and insert GIPHY GIFs from GitHub comment boxes.

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

Inspect hovered and selected page elements with on-page measurements and CSS details.

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.

This extension helps build web forms that save submissions in Google Sheets.

Extracts selected data from web pages using user-provided URLs and XPaths.

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.

Adds a rating-based activity heatmap to Codeforces user profiles.

Adds one-click access to turn GitHub repositories into LLM-ready prompts.

Formats and previews JSON and JSONP in Chrome with themes, collapsible nodes, and editing tools.

Counts and marks different types of links on a webpage.

Edit and preview Markdown with GitHub-flavored formatting in the browser.

This extension analyzes webpages for SEO factors and returns a score out of 100.

Highlights selected keywords on web pages to help with code inspection and document analysis.

Finds and opens XML sitemap files for the website you are viewing.

Shows WP Hive plugin metrics on WordPress.org plugin pages.

This extension encodes and decodes text strings in Base64.

This extension checks Core Web Vitals metrics for the current web page.

This extension helps testers record annotations, screenshots, and URLs during exploratory testing sessions.

This extension lets Webflow Designer users copy Flowbase components, wireframes, and SVG icons into their projects.

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

Inspect Preact component hierarchies and edit properties while debugging.

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

This extension highlights page elements with available id, name, and custom attributes for Selenium automation.

Pick colors from anywhere on your screen and copy their HEX codes.

Adds a GUI-based Python code generator for Google Colab.

Identifies font details on website text when you activate it and click or hover over text.

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

Detects the icons used by the current website when you click the extension button.

Preview and compare Google fonts directly on live webpages.

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

Adds file navigation, editor customization, snippets, AI help, and GitHub sync to the Google Apps Script editor.

Shows whether the current page has a self-referencing, different, missing, or invalid canonical tag.

Displays valid JSON pages as an interactive, highlighted tree for easier browsing and copying.

Checks a page’s Open Graph metadata and shows a social sharing preview.

Pretty Js sends text you select to linangdata.com and loads its popup content from that server.

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

Temporarily edits website text directly in the browser with a click.

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

Adds customizable horizontal and vertical guide lines on top of websites for design alignment.

Beautifies JavaScript, CSS, and HTML code directly in the browser.

This extension outlines selected HTML tags on a page and shows basic element details without opening the console.

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.

Adds a navigable file tree and quick search to GitLab repositories.

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.

Clears a page’s local storage and reloads it with a keyboard shortcut or button.

This extension automatically formats code on webpages for easier reading.