Screen OCR
Snapshot any problem on LeetCode, HackerRank, or virtual whiteboard and the AI processes it instantly.
Use case · Coding
AI coding interview copilot with OCR and live complexity analysis
Darknote.ai captures any LeetCode, HackerRank, or virtual whiteboard problem via OCR, diagnoses bugs, and suggests optimized algorithms with Big-O notation. Works with Python, JavaScript, TypeScript, Java, Go, C++, and Rust.
1 interview free · No credit card
Why coding interviews are so hard
The real challenges every candidate faces in a live technical round.
- The clock is running — 45 minutes to design, code, and test under pressure.
- The interviewer watches every keystroke waiting for mistakes.
- A brute-force solution isn't enough: you need optimal Big-O.
- Switching to the browser breaks your flow and the panel notices.
Real scenarios where Darknote.ai saves you
Cases we see every week in FAANG/MAANG candidates.
Two Sum with an unexpected twist
The interviewer modifies the classic problem and you need to adapt the hash map on the spot.
DarknoteOCR captures the modified prompt and the AI proposes the new data structure in seconds.
Hidden bug in your solution
Your code compiles but an edge case fails and you don't know why.
DarknoteCapture the code and Darknote diagnoses the specific bug (off-by-one, boundary, etc.).
Optimize from O(n²) to O(n log n)
Your solution passes but the interviewer asks to improve it.
DarknoteThe AI suggests sort + binary search, segment tree, or heap depending on the pattern.
Virtual whiteboard without autocomplete
Interview on CoderPad or whiteboard with no IDE help.
DarknoteDarknote acts as your invisible IDE: syntax, edge cases, and mental testing.
What the Code Copilot includes
Functions built specifically for live technical interviews.
Bug diagnosis
Paste or capture your code and get the specific bug with an explanation.
Optimized algorithms
Suggestions with time and space complexity (Big-O) explained.
Multiple languages
Python, JavaScript, TypeScript, Java, Go, C++, and Rust with native jargon for each.
Automatic edge cases
The AI lists typical boundaries: empty, single, negative, overflow.
Tech stack selector
Configure the framework (React, Spring, Node) for contextual feedback.
How Darknote helps in a coding interview
Workflow proven in real FAANG/MAANG interviews.
- Step/01
Activate the Code Copilot
Open Darknote, pick a technical profile, and toggle the Code Copilot panel.
- Step/02
Capture the problem
Take a screenshot with a global hotkey. OCR processes the prompt in under 2 seconds.
- Step/03
Get the strategy
The AI explains the approach, data structure, and complexity before you code.
- Step/04
Code with backup
If you get stuck, capture your current code for an exact diagnosis.
- Step/05
Optimize at the end
Ask the AI to improve from O(n²) to O(n log n) or O(n) based on the pattern.
“I passed Meta's technical screen with a LeetCode Hard. Darknote's OCR saved me 3 minutes spotting the sliding-window pattern.”
Camila R.Senior Software Engineer @ FAANG
Preguntas frecuentes
Frequently asked questions
Python, JavaScript, TypeScript, Java, Go, C++, Rust, and more. Configure your tech stack for language-native feedback.
Crush your next coding interview
Download Darknote.ai. 10 free minutes on signup to test the OCR Code Copilot.
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1 interview free · No credit card