Overview

Jeradinisyourscreen-awaredebuggingcopilot.

Point Jeradin at any tab, editor or terminal. In 2 to 5 seconds it tells you what's wrong, why it broke, which file is responsible, how confident it is, and exactly what to do next — without ever touching your codebase.

jeradin — watching lovable.dev
live
Detected · 3 issues
App.tsx:42
critical
Undefined state on render
api/auth.ts:18
warn
Missing await on fetch
ui/Modal.tsx:71
info
Hydration mismatch hint
Resolved · today
Stale closure in useEffect
Missing dep in array
App.tsx · line 42

user is undefined when profile.name renders

App.tsxread-only · jeradin will not write
  const { data: user } = useUser()
- return <h1>Hello, {user.profile.name}</h1>
+ return <h1>Hello, {user?.profile?.name ?? "there"}</h1>
Semantic explanation

useUser() resolves asynchronously, so on the first render user is undefined. Reading .profile.name throws before the fetch completes. Add optional chaining or guard with a loading state.

What it is

A debugger that lives on top of your screen.

Most tools ask you to paste the error, describe the stack, and hope the model guesses. Jeradin watches the pixels — your IDE, your browser devtools, your build output, your terminal — and reasons about the whole frame at once. It sees what you see.

Under the hood, Jeradin runs a two-tier intelligence pipeline. Simple mistakes (typos, missing imports, TypeScript friction, undefined vars) get an instant answer in about 2 seconds. Anything harder is escalated automatically to a deeper reasoning pass for hydration bugs, race conditions, cross-file causes and framework-specific quirks.

Sees the whole screen

OCR + DOM + accessibility tree parsing. Jeradin reads editors, browser consoles, network panels and terminals as one context.

Answers in 2–5 seconds

Instant mode handles common bugs in the time it takes to blink. Smart mode kicks in automatically for anything ambiguous.

Zero write access

Jeradin has no permission to edit, commit, push or install. By design, it can only observe and suggest.

Root cause + fix

Every report includes the root cause, the exact affected file, a confidence score, a primary fix and an alternative — plus side effects to watch for.

Runs where you already work

Browser extension, web app, and desktop builds coming. One account, one connection token, every surface.

Works across vibecoding tools

Cursor, Lovable, Replit, Windsurf, Warp, Chrome DevTools, plain VS Code — if you can see it, Jeradin can debug it.

How you use it

Three ways to run Jeradin.

Chrome extension

Install once, pin the icon, click Capture on any tab. Report appears inside the popup.

Install extension
Web workspace

Sign in at jeradin.com, drag a screenshot in or share your screen, and get the same report in the browser.

Open web app
Desktop app

Windows, macOS and Linux builds are in private beta. Join the waitlist and we'll ping you the moment it's ready.

Join waitlist

Never lose an afternoon to a silent bug again.

Free during beta. No credit card.

Download Jeradin