Lessons and tools are free and need no account. Practice features save your progress, so those need a free sign-in.
Free, no account needed.
A new problem explained clearly, every day — Python, LeetCode patterns, SQL and AI.
Every video has a full write-up with working code and the reasoning behind it.
Jump straight to dynamic programming, hash maps, graphs, two pointers and more.
Curated developer and AI headlines, summarised and always linked to the source.
A built-in assistant that answers questions about anything on the site.
Free, but needs an account so your progress is saved.
Twenty questions across technical, coding, managerial and HR rounds, built from your own resume.
A scored breakdown of every round, your strengths and gaps, and a four-week plan.
Structured curricula with lessons, quizzes and notes — track what you've finished.
Tell it your target role and get a readiness score with a path to close the gaps.
Build a clean, structured resume and download it as a PDF.
Common behavioural questions with STAR guidance for structuring your answer.
Bookmark questions during a mock interview and come back to them later.
Score trends over time, performance by round and difficulty, and your practice streak.
No sign-up, and nothing you type is uploaded.
Time and space complexity for every common data structure and sorting algorithm.
Binary, octal, decimal and hex — plus the bitwise tricks interviews ask about.
Compare two blocks of code line by line and see exactly what changed.
JSON formatter, regex tester, JWT decoder, hashes, UUIDs, Markdown preview and more.
Every lesson lands here first. Subscribe to get them as they drop.
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Tell us what to cover next — real requests shape the upload schedule.
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