SuperDev Pro packs 50+ developer, designer, marketer, and power-user tools into a single keyboard-driven sidebar — so you can stop hoarding one-off extensions. Toggle the shell with ⌘⇧E (macOS) or Ctrl+Shift+E (Windows/Linux). Hit ⌘⇧S to open the command palette and jump straight to any tool. Inspect

CSS Inspector — live styles + computed values, copy any rule
Layout Tools — box model, flex/grid overlays, parents/children
Ruler & Measure — click two points: distance, angle, ΔX/ΔY
Color Picker — eyedrop + history + HEX/RGB/HSL
Color Palette — extract every color used, highlight where it appears
Site Stack — detect frameworks, CMS, analytics, CDN, server
SEO Meta — full on-page audit: meta, social, headings, images, links
Page Speed — Core Web Vitals, resources, page weight
Accessibility — contrast, alt text, ARIA, headings, labels
AI Assistant — BYOK chat over any OpenAI-compatible API with page context

Design & Modify

Font Changer — pick element, 50+ Google Fonts, live preview
List Fonts — detect every font on the page, highlight usage
Pattern Background — 8 patterns, presets, copy CSS
Dark Mode — force dark on any site, per-domain control
Code Injection — JS / CSS / HTML per-domain with snippet library
Live Text Editor — click to edit, track changes, export HTML
Image Replacer — drop file or URL, persists across reloads
Move Element / Delete Element / Page Outliner — surgical DOM tweaks

Capture

Screenshot — visible, area selection, or full-page (JPG/PNG)
Save as PDF — live preview, A4/Letter, custom margins
Table Capture — every <table> on the page → CSV / TSV / JSON / Markdown
Export Element — pick any element → HTML + matched CSS to CodePen

Data

Web Scrape — auto-detect lists & tables, scrape, export
API Tester — any origin, CORS-free, request history
URL Opener — bulk-open URLs with pause/stop control
Extract Images — img + background + SVG + favicon + og, bulk download
Broken Link Checker — parallel HEAD checks, live progress, CSV
Webpage → Markdown — page / main / picked element → GFM
Stripe Analytics — charges, MRR, refunds, breakdowns
Subreddit Insights / Reddit User Analyzer / Cross-Post Finder — full Reddit toolkit

Workflow

Todo — per-site task list
Sticky Notes — drop notes anywhere, drag, 6 colors, per-site persist
Tab Manager — list, filter, bulk close/copy/move
UTM Builder — campaign URLs with templates and custom params

Browser

Cookie Editor — list, search, add, edit, export cookies
Clear Browsing Data — this site or all, 11 categories, time-range
Redirect Path — trace full chain with status + headers

Utility

Currency Converter — live FX, detect amounts on page, 30+ currencies
Email Finder — scan text, mailto, obfuscated, group by domain
QR Code — URL, vCard, Wi-Fi, custom color, embedded logo
JSON Formatter — format, minify, sort keys, validate
Encoder / Decoder — Base64, URL, HTML, hex, Unicode, MD5/SHA
World Clock — multi-timezone with floating widget

Privacy Everything runs locally in your browser. No tracking, no analytics, no telemetry. Your data never leaves your machine unless you explicitly send it somewhere (e.g. Export to CodePen, BYOK AI calls). Source & support

Homepage: https://superdevpro.com
Contact: contact@superdevpro.com