Pixel-perfect UI inspection for designers and front-end developers. Inspect, measure, and compare any web page against your designs — right in the browser.
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A full inspection toolkit that runs entirely in your browser — no setup, no accounts, no data leaving your machine.
Hover any element for its selector, box model, computed CSS, and ancestry. Screenshot it to PNG or copy its styles as a CSS rule.
Click one element, hover another — see exact pixel distances between any two elements, live.
Overlay a configurable column/gutter/margin grid, plus pixel rulers along the viewport edges.
A live magnifier samples the exact pixel under your cursor. Build a palette with hex/RGB/HSL, CSS-variable matches, and a WCAG contrast checker.
Outline the page's full element structure at a glance, or find elements by text or CSS selector and cycle through matches.
Preview any URL with true device emulation — viewport, touch, and user agent — in a real tab, so login and SSO flows keep working.
Anchor a Figma frame to your live DOM and get a per-element diff heatmap with severity grading and design-token hints.
Compare one Figma frame per breakpoint: Loupe reflows the page to each width and tabulates the differences.
Page-wide scan for WCAG contrast failures, missing alt text, small tap targets, unlabeled fields, and heading-order issues.
Optional AI-written fix suggestions using your own Anthropic API key, and one-click export of a standalone QA report.
The inspector toolkit is free forever. Loupe Pro adds design comparison, auditing, and reporting — with a 7-day free trial.
forever
No account needed. Free forever.
or $59/year · or $129 once for lifetime access
7-day free trial · payments securely processed by Stripe via ExtensionPay · cancel anytime
for teams & companies
Tell us your team size and we'll put together a quote.
Everything runs locally in your browser — no analytics, no tracking, no inspection data ever leaves your machine. Figma and Anthropic tokens are optional, stored on-device, and sent only to the API you connect them to. Read the full privacy policy.