Developer tools
59 extensions we track, sorted so the ones asking for the least access come first. 19 of them work without access to every site you visit.
| Extension | Site access | Permissions | Users | Rating |
|---|---|---|---|---|
| Font Picker | All sites | 2 | 90K | 3.2★ |
| Check My Links | All sites | 4 | 90K | 4.4★ |
| Adswerve - dataLayer Inspector+ | All sites | 4 | 90K | 4.1★ |
| Site Palette | All sites | 3 | 80K | 3.6★ |
| Viewport Resizer: Ultimate Device Emulator & Website Testing Tool | All sites | 4 | 80K | 4.2★ |
| HackBar | All sites | 4 | 80K | 4.2★ |
| Snap Pixel Helper | All sites | 4 | 70K | 3.9★ |
| Checkbot: SEO, Web Speed & Security Tester 🚀 | All sites | 1 | 70K | 4.9★ |
| Sourcegraph | All sites | 2 | 70K | 4.5★ |
| Yet Another REST Client | All sites | 3 | 60K | 4.4★ |
| RestMan | All sites | 1 | 60K | 4.4★ |
| Fontanello | All sites | 2 | 60K | 4.6★ |
| tweak: mock and modify HTTP requests | All sites | 3 | 60K | 4.6★ |
| UI5 Inspector | All sites | 4 | 50K | 4.6★ |
| Screen Ruler - Measure and Inspect the Web | Limited | 8 | 50K | 4.4★ |
| Web Maker | All sites | 3 | 50K | 4.8★ |
| Fake Data - A form filler you won't hate | All sites | 4 | 50K | 4.7★ |
| AMP Validator | All sites | 2 | 50K | 4.4★ |
| Spector.js | All sites | 3 | 40K | 4.7★ |
| Chromium browser automation | All sites | 4 | 30K | 3.5★ |
| PixelZoomer | All sites | 3 | 30K | 4.5★ |
| Ember Inspector | All sites | 2 | 30K | 4.8★ |
| Visual Inspect UI | All sites | 2 | 1K | 5.0★ |
| Boomerang - SOAP & REST Client | All sites | 5 | 100K | 4.6★ |
Font Picker
Developer Tools
Identify font details (family, size, weight, style) on any webpage via right-click.
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Check My Links
Developer Tools
Scans webpages, Google Docs, and Sheets to identify broken or invalid links with one click.
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Adswerve - dataLayer Inspector+
Developer Tools
Inspect and monitor dataLayer, log GA hits, and inject code for testing.
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Site Palette
Developer Tools
Extracts a color palette from any website using multiple algorithms, with export to Figma, Sketch, and Adobe Swatch.
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Viewport Resizer: Ultimate Device Emulator & Website Testing Tool
Developer Tools
Emulate devices, resize viewports, and test responsive web designs with touch simulation and breakpoint guides.
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HackBar
Developer Tools
A browser extension for penetration testing with SQLi, XSS, LFI, SSRF, SSTI, encoding, hashing, and request
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Snap Pixel Helper
Developer Tools
A Chrome extension for verifying, debugging, and troubleshooting Snap Pixel implementations on websites.
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Checkbot: SEO, Web Speed & Security Tester 🚀
Developer Tools
Audits websites for SEO, speed, and security issues by crawling hundreds of pages simultaneously.
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Sourcegraph
Developer Tools
Connect Sourcegraph to GitHub to open repos, compare revisions, and search code from Chrome's Omnibox.
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Yet Another REST Client
Developer Tools
Yet Another REST Client is a free Chrome extension for testing and debugging RESTful APIs with features like favorites
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RestMan
Developer Tools
Browser extension for testing REST APIs by sending HTTP requests and inspecting responses.
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Fontanello
Developer Tools
Right-click any text to see its font, size, color, and contrast ratio.
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tweak: mock and modify HTTP requests
Developer Tools
tweak lets you mock and modify HTTP requests in the browser for testing, development, and demos.
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UI5 Inspector
Developer Tools
Inspect, modify, and debug OpenUI5/SAPUI5 controls and properties directly from Chrome DevTools.
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Screen Ruler - Measure and Inspect the Web
Developer Tools
Hover over any web element to measure sizes, margins, paddings, and inspect CSS, colors, and more.
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Web Maker
Developer Tools
An offline code editor for HTML, CSS, and JavaScript that runs in a new tab, with preprocessor support, collaboration,
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Fake Data - A form filler you won't hate
Developer Tools
Fake Data generates random, realistic data to fill forms instantly with customizable options and keyboard shortcuts.
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AMP Validator
Developer Tools
Automatically validates AMP pages and shows pass/fail status, errors, and AMP version links.
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Spector.js
Developer Tools
Captures and inspects WebGL frames to help developers debug and troubleshoot their 3D scenes.
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Chromium browser automation
Developer Tools
Automation extension for Chromium that records interactions, injects code, and manages projects with local storage,
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PixelZoomer
Developer Tools
Captures website screenshots and provides a ruler, zoom, and eye dropper for pixel analysis.
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Ember Inspector
Developer Tools
Chrome DevTools extension for debugging and inspecting Ember.js applications.
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Visual Inspect UI
Functionality
Inspect and modify web page elements, edit styles and text, and extract images and videos.
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Boomerang - SOAP & REST Client
Developer Tools
Boomerang is a browser-based API testing tool for REST and SOAP services with local storage and offline support.
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