Select the code block or stack trace
Highlight the exact lines of code, diff hunk, or error message in your browser tab.
Explain code snippets, stack traces, and compiler errors directly in the browser.
Highlight unfamiliar code blocks on GitHub, Stack Overflow, or CI build logs and press Ctrl+Shift+X to get a line-by-line explanation beside the code.
Best fit
Best for developers reviewing pull requests, debugging CI logs in the browser, or reading unfamiliar open-source repositories.
On-screen walkthrough
How this looks on a real webpage.
Instead of switching tabs and rebuilding context, highlight the exact passage that slowed you down and press your shortcut (default: Ctrl+Shift+X or Cmd+Shift+X on macOS, fully customizable in settings).
1. Highlighted on page (GitHub Actions CI Log / TypeScript Build Output)
error TS2322: Type 'Promise<User | undefined>' is not assignable to type 'User'. Did you forget to use 'await'?
Ctrl+Shift+X“Why is this happening inside my `.map()` callback even though the outer function is marked `async`?”
2. Vezz me on-screen answer overlay
`Array.prototype.map()` does not await async callbacks—it synchronously returns an array of `Promise<User | undefined>[]` instead of resolving each item.
Fix: Wrap the `.map()` in `await Promise.all(items.map(async (item) => ...))` so the promises resolve before assignment.
3. Suggested follow-up questions in thread
- “What if I want the async calls to run sequentially instead of in parallel?”
- “How do I filter out `undefined` values with proper TypeScript type narrowing after `Promise.all`?”
- “What happens if one promise in `Promise.all` rejects?”
Step-by-step workflow
How to run this workflow in place.
Press Ctrl+Shift+X in place
Vezz me opens an explanation panel next to the code block without leaving the repository or log page.
Ask about side effects and edge cases
Follow up on time complexity, memory allocations, or safer idiomatic alternatives.
Key details
Why this approach works better than switching tabs.
Frequently asked questions
Common questions about developer workflow.
Can Vezz me explain code inside GitHub pull request diffs?
Yes. Highlight any added or removed lines in a GitHub PR diff and press Ctrl+Shift+X to ask what the change does or whether it introduces edge cases.
Does Vezz me work on regex and SQL queries too?
Yes—see our dedicated guide on decoding regular expressions, SQL queries, and configuration files.
Related workflows & guides
Explore connected pages.
Ready to try this workflow on your own reading?
Install Vezz me free, highlight text on any webpage, and press your customizable shortcut (default: Ctrl+Shift+X or Cmd+Shift+X on Mac) to get an answer right beside the source.
