Free, open-source responsive design tester: see a site on 290+ phones, tablets and desktops at once, find layout bugs on each, and check pages from the CLI or AI agents (MCP).

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• Updated Oct 22, 2026
• TypeScript

AI screenshot comparison platform for signage and cross-platform QA

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• Updated Nov 5, 2026
• HTML

Free, open-source responsive design tester. Preview any site on iPhone, Android, iPad and desktop side by side, with synced scrolling, per-device logins and one-click cookie reset.

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• Updated Nov 5, 2026
• JavaScript

Responsive testing for Chrome and Firefox. Compare multiple viewports, run local SEO and accessibility checks, and export reports. Supports English, Turkish and Norwegian Bokmål.

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• Updated Oct 14, 2026
• TypeScript

Local-first responsive website testing and visual regression tool for developers.

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• Updated Oct 12, 2026
• TypeScript

Manual QA portfolio project covering test planning, executed test cases, defect reporting, evidence, GitHub Issues, and defect tracking for the Restful Booker Platform.

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• Updated Jul 3, 2026

Chrome extension that shows one website on every screen at once: phones, foldables, tablets, laptops, watches and TVs in a single tab, with navigation, scrolling and clicks in sync.

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• Updated Sep 20, 2026
• JavaScript

Mobile preview for developers and AI agents. See any website the way it looks on a real iPhone, iPad, Android phone or MacBook — and let an AI agent see and drive that same window over MCP. Responsive testing with device frames measured in millimetres. Windows and macOS apps, VS Code extension, MCP server.

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• Updated Aug 30, 2026
• JavaScript

Free, open-source desktop QA browser for testing your own website forms by US location (state, city, ZIP), emulated device and browser. Windows, Linux, macOS.

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• Updated Nov 12, 2026
• TypeScript

Breakpointer — Chrome extension to preview websites at multiple viewport sizes and find where your layout breaks.

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• Updated Nov 9, 2026
• TypeScript

Manual UI Testing project including test cases, bug reports, and test summary

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• Updated May 4, 2026

A modern toolbox of useful utilities for frontend developers, including JSON formatting, CSS generators, image tools, and debugging helpers — built with pure HTML, Tailwind CSS, and JavaScript.

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• Updated Feb 26, 2026
• HTML

A simple, powerful cross-device testing tool for web developers. Test any website across multiple devices simultaneously with AI-powered automation planned.

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• Updated Aug 23, 2025
• TypeScript

Free, open-source Chrome extension to preview any website on phones, tablets and desktops side by side, with synced scrolling, screenshots and video recording. No debugger banner, no account.

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• Updated Sep 26, 2026
• JavaScript

MCP server for dynamic Playwright browser pool management — 75 tools, 28 built-in UI audits, 42 CLI commands, 143 device presets, golden profile auth. Built for Claude Code, Cursor, and AI-assisted web development.

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• Updated Oct 25, 2026
• JavaScript

Testes E2E do cardápio digital Anota AI com Cypress, em desktop e mobile (matriz de viewport no CI).

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• Updated Sep 25, 2024
• JavaScript

E2E testing suite for PokéAPI using Cypress and Page Object Model

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• Updated Mar 2, 2026
• JavaScript

A reproducible test bench: a page with 8 known defects, 3 viewports, 3 engines (Chromium, Firefox, WebKit) with Playwright, run in Docker.

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• Updated Nov 11, 2026
• JavaScript

Playwright suite for a storefront, built around checkout arithmetic rather than screens. 32 tests across desktop and phone, including accessibility. Three defects, one of them an empty order the store confirms.

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• Updated Nov 9, 2026
• TypeScript

Compare saved route screenshot manifests across viewport and device profiles; does not capture images.

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• Updated Oct 13, 2026
• JavaScript