How to use Frontend Interview Prep
Frontend Interview Prep is a free, no-signup study tool: 265 frontend interview questions you can search, run, flag, and drill. Here is everything it does and how to get the most from it.
Find the right questions
Use the search box to match on titles, patterns and keywords, and the area and difficulty chips to narrow the list — for example React · Hard, or everything tagged Accessibility. Your current filter lives in the URL (?area=React&diff=Hard&q=hooks), so any filtered view is a link you can bookmark or share.
Study a question
Expand a card in place to read the full answer, complexity notes and code, or follow Open ↗ to that question’s own page at /q/<slug>.html — a shareable, split-pane view with the prompt on one side and the editor on the other.
Run code in the browser
Every code question has a live editor: edit the solution and run it against a real console and preview, with no setup and no signup. It is a sandbox — experiment freely, nothing you type is saved or sent anywhere.
Quiz yourself with an AI
Copy as prompt on any question copies a ready-made “quiz me on this” prompt you can paste straight into ChatGPT or Claude to be interviewed on that topic.
Track what you’ve done
Mark a question done to keep score as you work through an area. Progress is saved with your browser’s localStorage on your own device — nothing leaves your machine and no account is needed.
Flag questions for review (★)
Tap the ★ on any question to flag it for review. The ★ Review toggle in the toolbar then filters the list down to just your flagged questions, so you can come back to the ones that gave you trouble. The review view is shareable too (?review=1).
Practice with flashcards (▸)
Hit ▸ Practice to drill the current filtered view as flashcards — so filter to, say, React · Hard or your ★ Review queue first, then practice exactly that set. Each card shows the prompt; Show answer flips it to reveal the full answer, then you self-grade: Again flags the card for review, Got it clears it. Cards are shuffled, and a summary at the end shows how you did.
Keyboard shortcuts
On the question list, j and k move between cards and o opens the highlighted one. In practice mode: Space flips the card and then grades it as correct, 1 is Again, 2 is Got it, S shuffles, and Esc closes.
Subscribe to the RSS feed for the newest questions.
Your privacy
There is no account, no newsletter and no tracking beyond ads. Your progress and review flags stay in your own browser; see the privacy policy for the details.