UI Testing Inspector

Visual regression testing without false alarms. Compares your page to a baseline and ignores dynamic content. Runs 100% locally.

Tired of manually checking for visual bugs after every code change? UI Testing Inspector is your go-to visual diff checker with DOM analysis. Why use it? ⚡️ 100% Local & Private: all screenshots and comparison data stay on your computer. No cloud services, no data sharing ⚡️ Instant Feedback Loop: install the extension, take a baseline, make your code changes, and see the differences instantly. Perfect for quick regression tests ⚡️ Pixel-Perfect Detection: catch even the smallest visual changes that human eyes might miss Key Features: 🔸 One-Click Baseline: capture the "before" state of any webpage with a single click 🔸 Pixel-Perfect Visual Diff: get a clear report showing the baseline, the current state, and an image highlighting the exact differences 🔸 Inspect Element: go beyond the basic inspector. See not just the code, but also what has changed in the DOM and CSS 🔸 Full Page & Viewport Capture: choose between capturing the visible area or the entire scrollable page 🔸 Report History: save and review up to 15 previous comparison reports 🔸 Light & Dark Themes: for comfortable viewing, day or night Inside Detailed Report 🔍 After every comparison, you get a comprehensive report that gives you the full picture: ✔️ Summary: the percentage of visual differences and a count of added, removed, and modified elements ✔️ Side-by-Side View: compare "Before" and "After" screenshots right next to the highlighted "Differences" image ✔️ DOM & CSS Change List: pinpoint the exact elements that changed. No more guessing why a pixel moved — see the code-level changes like color, font-size, or margin ✔️ Technical Details: comprehensive analysis of layout changes, content modifications, and structural updates What You'll Catch: ➤ Layout shifts and misalignments ➤ Color and styling changes ➤ Missing or moved elements ➤ Font and text modifications ➤ Image differences How It Works: 1️⃣ Set a Visual Baseline: navigate to the page you want to test and click "Set Baseline" in the extension popup. This is your source of truth. 2️⃣ Code with Confidence: make changes to your CSS, update content, or refactor components. 3️⃣ Instantly Check for Changes: click "Compare with Baseline". A new tab will open with a detailed visual report. 4️⃣ Analyze the Differences: use the side-by-side view and the list of detected changes to spot every issue. 5️⃣ Update the Baseline: happy with the new version? Simply click "Set Baseline" again to save the new look as your reference. Pro Tips ✨ Wait for pages to load completely before capturing baselines ✨ Use full-page capture for comprehensive testing ✨ Take screenshots in the same browser window size for accurate comparisons ✨ Capture baselines when content is stable ✨ Test one change at a time for clearer diff results ✨ Save important baselines before major code refactors ✨ Compare similar page states (same user login status, data loaded) Use Cases ✅ Visual Regression Testing: the core use case. After making changes, run a comparison to catch any unintended visual bugs. ✅ UI/Design Verification: ensure pixel-perfect implementation and brand consistency against design mockups. ✅ CSS Refactoring: fearlessly refactor legacy CSS. A quick visual diff test will immediately tell you if your changes had any unexpected side effects. ✅ Frontend Testing: an essential tool for any frontend testing workflow, providing immediate visual feedback. Who's It Built For? ➡️ Frontend Developers: Catch layout issues before you commit your code ➡️ QA Engineers: Enhance your manual UI tests with a reliable visual verification step ➡️ UI/UX Designers: Quickly ensure the live implementation matches your designs ➡️ Freelancers & Small Teams: A visual testing tool without the enterprise price tag FAQ ❓How does it detect changes? 💬 It uses a dual-method approach: a pixel-by-pixel comparison for the visual diff and a structural scan for the DOM/CSS change list. ❓Is my data secure? 💬Yes. Everything is processed and stored 100% locally in your browser. ❓ Can I use it on localhost? 💬 Absolutely! It works perfectly during local development ❓ What about dynamic content? 💬 The tool is designed for comparing static states. For best results, capture your screenshots when animations are complete and ads are stable.