Pixel-perfect UI inspection for designers and front-end developers. Inspect, measure, and compare any web page against your designs — right in the browser.
★★★★★ Already using Loupe? Rate it on the Chrome Web Store
Enable on any tab with one click or Alt+Shift+K · see all shortcuts
Works in every Chromium browser — Chrome, Edge, Brave, Arc, Opera — from the same install link.
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 an anchor element, hover another — exact pixel distances between them, live, in DevTools style.
Drag or arrow-key elements around the live page and compare against a ghost of the original — then export the change list for your developer or AI agent, with before/after screenshots.
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.
A centered device preview with 21 presets and zoom — or switch to in-place emulation with real mobile UA and touch for login and SSO flows.
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.
A quick rating helps other designers and developers find it — and it genuinely makes our day.
★★★★★ Rate Loupe on the Chrome Web StoreWork without leaving the keyboard — shortcuts stay active on any page while the dock is visible. Single-letter keys are ignored while you're typing in a field.
The inspector toolkit is free forever. Loupe Pro adds design comparison, auditing, and reporting — buy once, use forever, with a 7-day free trial.
forever
No account needed. Free forever.
one-time purchase · yours forever
No card for the trial. Install Loupe, then hit Upgrade in the panel to buy — payments handled by Stripe via ExtensionPay. How it works.
teams up to 10 people
Instant self-serve checkout via Stripe — your signed licence file is issued the moment payment completes.
Fair use: one licence covers one organisation, up to 10 people. Bigger teams, multi-brand groups, and agencies reselling to clients — talk to us and we'll sort a licence that fits.
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.