SuperDev Pro

SuperDev Pro puts 52 browser tools in one sidebar, so you don't need 52 extensions. Inspect a page — live CSS, box model and flex/grid overlays, an on-page SEO audit, Core Web Vitals, and an accessibility check for contrast, alt text and ARIA. Modify it — swap fonts on any element, force dark mode, edit text in place, replace images, preview at different device sizes, or inject your own JS and CSS per domain. Capture it — screenshot a region or the full page, save as PDF, or pull every table into CSV, JSON or Excel. Pull data out of it — scrape with custom selectors, test APIs without CORS headaches, check for broken links, convert the page to Markdown, or extract every image and email address. Plus the small things you'd otherwise open a tab for: cookie editor, JSON formatter, QR codes, UTM builder, currency conversion, sticky notes, reader mode. Everything runs locally in your browser. No tracking, no analytics, no telemetry — your data never leaves your machine unless you explicitly send it somewhere. Free to install, no account needed. Every tool is unlocked for a 24-hour trial, then a one-time lifetime license. No subscription, all future updates included. Homepage: https://superdevpro.com Contact / feature requests: contact@superdevpro.com