# Compare browser design tools > Compare Sitepeel, Chrome DevTools and Lighthouse for website inspection, HTML/CSS exports and page audits. Choose by the task, with a reusable checklist. Canonical page: https://sitepeel.dev/guides/browser-tools-for-web-designers/ Use Chrome DevTools to investigate CSS and application behavior, Sitepeel to collect design references and rendered exports, and Lighthouse to audit page quality. These browser tools serve different parts of a design workflow and can be used together. Published: 2026-09-20 Tool used in this guide: [CSS inspector & ruler](https://sitepeel.dev/css-inspector/index.md) ## Choose by the output you need Start with what you need to take away: an explanation of a broken layout, a reusable design reference, or a report of issues to investigate. That choice is more useful than a long list of extensions with overlapping features. We make Sitepeel. This comparison is based on our own website inspection and export checks, our recorded Lighthouse audit, and the official documentation linked below. It is a task comparison, not an independent ranking or a speed benchmark. Chrome DevTools and Lighthouse do not require a separate design extension for the workflows described here. Three browser tools, compared by task and output | Tool | Use it for | Keep in mind | | --- | --- | --- | | Chrome DevTools | Investigating CSS rules, layout and browser behavior. | Inspection changes need to be carried back into your source project. | | Sitepeel | Collecting design details, rendered HTML/CSS and Design MD. | Exports do not recover the original application or its backend. | | Lighthouse | Finding page quality issues in an audit report. | Automated checks do not replace manual review or real-user measurements. | ## Chrome DevTools: understand why the page behaves that way Choose DevTools when the question is about cause: which rule sets this width, why is this declaration overridden, or what changes at a breakpoint? Inspect the element, compare the Styles and Computed views, and examine its parent container. For example, if a heading wraps differently from the reference, compare the font that actually loaded, the available width and the relevant CSS. Change one value at a time and observe the effect. A local experiment helps identify the fix; the lasting change belongs in your project. This is a strong starting point for CSS debugging. If your main task is collecting many design observations into a handoff document, plan how you will record and organize the findings as you inspect. - [Follow a complete website design inspection workflow](https://sitepeel.dev/guides/how-to-inspect-website-design/index.md) - [Choose specialist Chrome extensions for design work](https://sitepeel.dev/guides/best-chrome-extensions-web-designers-2026/index.md) - [Compare extensions for debugging and development](https://sitepeel.dev/guides/best-chrome-extensions-web-developers-2026/index.md) ## Sitepeel: take a design reference into your project Choose Sitepeel when you want an output you can reuse: an element’s rendered HTML and CSS, a current-page snapshot, a reviewed color palette or a Design MD reference. Its tools group common collection tasks inside a desktop browser extension. A practical exercise is to select one button, review the HTML and CSS preview, and export it. Then check the result in your own project. Fonts, inherited styling and external assets can still need attention; the output is not the original component source. For an AI workflow, use Design MD for recurring visual decisions and a design prompt for the particular page you want to build. Review both before handing them off. Sitepeel is designed for Chrome, Edge and Brave on desktop; website demos can be tried before installing. Current lifetime terms are shown in the site’s pricing section. ![Sitepeel’s element export showing HTML, CSS and a preview of an Explore our spaces button.](https://sitepeel.dev/videos/element.webp) Actual Sitepeel product capture: review the selected element and its rendered code before exporting. - [Try the HTML and CSS extractor](https://sitepeel.dev/html-css-extractor/index.md) - [See what a Design MD export contains](https://sitepeel.dev/design-md-generator/index.md) ## Lighthouse: turn page checks into an issue list Choose Lighthouse when you want an automated report covering performance, accessibility, best practices and SEO. It can run from Chrome DevTools or the command line. Use each finding to decide what to investigate next. We used Lighthouse on Sitepeel’s homepage during our September 18, 2026 review. The report separated audit findings into categories, giving us a different output from a CSS inspection or a design export. It did not produce a reusable component or establish a Google ranking. Keep test conditions consistent when comparing runs. Review the underlying findings rather than treating the score as a complete assessment of the website. Keyboard use, content clarity and real-device behavior still need attention. ## Use the three tools in one review Suppose you are rebuilding a product page you own. First, use DevTools to understand its containers, responsive changes and confusing style rules. Write down uncertainties before copying anything. Next, use Sitepeel to collect only the reference you need: one element, the current page, or a design document. Adapt that reference to your own content and implement the required navigation, forms and states in your application. Finally, run Lighthouse against the page you built. Investigate its findings, then manually check the main visitor task with a keyboard and a narrow viewport. Keep the source reference, implementation and audit notes separate so you can see which problem belongs to which stage. - [Troubleshoot exported styles that look different](https://sitepeel.dev/guides/copied-css-not-working/index.md) - [Give an AI assistant a reviewed design reference](https://sitepeel.dev/guides/use-design-md-with-ai/index.md) ## Try the same small task before choosing an extension If you are looking for the best browser extension for web design, compare tools on a task you actually repeat. Use one page, one viewport and one component. Check the usefulness of the output, supported browsers, installation permissions and purchase terms. Avoid scoring a tool for a job it does not claim to do. An audit report and an HTML export are different deliverables. This checklist helps you record what happened without inventing a universal winner. Example: browser-tool-comparison.md ``` # Browser tool comparison Task: [inspect a layout, export an element, or audit a page] Page and viewport: [use the same conditions] Tool and version: [record what you tried] - [ ] It completes the task I need. - [ ] I can understand and reuse its output. - [ ] Missing fonts, assets or states are clear. - [ ] It works in my browser and workflow. - [ ] I understand permissions and data handling. - [ ] I checked current pricing and access terms. Observed result: [what actually happened] Limitations: [what needed another tool or manual work] Decision: [use it for a specific task, with reasons] ``` ## Questions and answers ### Do I need a browser extension to inspect web design? No. Chrome DevTools can inspect HTML, CSS and layout without a separate extension. Add a design extension when its collection or export workflow helps with a task you perform regularly. ### Does Sitepeel replace DevTools or Lighthouse? They serve different purposes. Sitepeel collects design details and exports. DevTools helps investigate browser behavior, and Lighthouse generates an automated audit. Choose the output that answers your question. ### Does a high Lighthouse SEO score mean the page will rank? No. The score reflects the checks in that audit. It does not measure your keyword position, guarantee indexing or establish whether a page answers a searcher’s question better than other results. ## Further reading - [Chrome DevTools: CSS inspection and local style changes](https://developer.chrome.com/docs/devtools/css/) - [Lighthouse: official overview and audit workflows](https://developer.chrome.com/docs/lighthouse/overview) ## Related pages - [Inspect a website design](https://sitepeel.dev/guides/how-to-inspect-website-design/index.md): Inspect a website’s layout, fonts, colors and CSS. Follow a practical browser workflow with real Sitepeel screenshots and a downloadable review checklist. - [HTML & CSS extractor](https://sitepeel.dev/html-css-extractor/index.md): Pick a website element and inspect its HTML and CSS. Preview, copy or save a button, card or section with Sitepeel’s browser tools. - [Use Design MD with AI](https://sitepeel.dev/guides/use-design-md-with-ai/index.md): Give an AI coding assistant a clear design reference. Learn how to hand off Design MD, write a focused task and review the resulting interface.