See It In Action
Intelligent screen scanning and code generation at your fingertips.
See What Celato AI Sees
Hover, drag, or auto-scan to reveal the hidden AI layer.
Longest Substring Without Repeating...
Given a string s, find the length of the longest substring without repeating characters.
Input: s = "abcabcbb"Output: 3class Solution:
def lengthOfLongestSubstring(self, s):
# TODO: Implement sliding window
|
Use a set to store characters in the current window. Expand right, contract left if duplicate found.
charSet = set()
l = 0
for r in range(len(s)):
while s[r] in charSet:
charSet.remove(s[l])
l += 1
charSet.add(s[r])
res = max(res, r - l + 1)
More Than Just Code
Celato adapts to the interview format. Whether it's a silent coding test or a live video call, we have you covered.
Code Mode
Perfect for OA (Online Assessments) and screen-sharing coding rounds. Includes the Universal Scanner to solve aptitude/MCQs instantly from any webpage and smart code explanation.
Live Mode
Real-time transcription using ultra-low latency speech models. Listens to system audio (Zoom/Teams/Meet) to generate instant captions. Includes 'Analyze Screen' to read shared content while listening.
Pro Mode
The ultimate stealth experience. Includes Phantom Mode - runs as an invisible background process with no windows or tray icons. Combines Code + Live with local transcription models and self-hosted data.
"How would you scale this database for 1 million concurrent users?"
- Discuss Sharding (Horizontal scaling).
- Mention Read Replicas for query offloading.
- Suggest Consistent Hashing.
Everything You Need to Pass
Multi-Model Support
Switch between GPT-4o, Claude 3.5 Sonnet, and Gemini 2.0 Flash instantly. Choose speed for live rounds or depth for complex coding.
Aptitude & MCQs
One click captures the question and options. Celato solves logical reasoning, probability, and verbal ability questions instantly.
Smart Screenshots
Intelligent cropping automatically separates problem text from your code editor for better context processing.
Real-time Debugging
Stuck on a syntax error? Take a snap of the error message and Celato suggests immediate fixes without switching tabs.
Local & Private
Screenshots and API keys are stored locally. We have zero telemetry and cannot see your interview data.
Window Management
The overlay stays Always-On-Top but lets you click through it to type in your code editor seamlessly.
Context-Aware Intelligence
Upload your Resume and target Company URL. Celato personalizes every answer to your experience level and the specific role requirements.
Phantom Mode
Pro users can activate invisible background mode. No windows, no tray icon - just seamless assistance delivered to your private self-hosted dashboard.
Invest in Your Career
Choose the plan that suits your needs.
Celato Pro
The Complete Suite
The ultimate toolkit. Get full access to both Code and Live features, plus priority server capacity.
Weekly
Included Features:
- Everything in Code & Live
- Phantom Mode (Stealth)
- Local Transcription Models
- Priority Support
Strict No Refund Policy • Cancel Anytime Before Renewal
How to Get Your API Keys
Celato allows you to bring your own API keys for maximum privacy and control.
Google Gemini API Free Tier Available
- Go to Google AI Studio.
- Sign in with your Google account.
- Click on "Create API Key".
- Select a project (or create new) and copy the key starting with
AIza.... - Paste it into Celato Settings > API Keys.
Groq API
- Visit our Groq Setup Guide.
- Follow steps to get your ultra-fast inference key.
- Paste it into Celato Settings > General > Groq.
OOpenAI API (GPT-4o)
- Visit the OpenAI Platform.
- Log in or Sign up. (*Note: You must add billing credits specifically for the API, ChatGPT Plus subscription does not cover this).
- Click "Create new secret key".
- Name it "Celato" and copy the key (
sk-...).
AAnthropic API (Claude 3.5)
- Go to the Anthropic Console.
- Add credits to your account (minimum $5 usually).
- Navigate to "API Keys" and click "Create Key".
- Copy the key starting with
sk-ant....
Frequently Asked Questions
Critical Liability Notice: Educational Use Only
Celato is strictly an educational tool. Use for academic dishonesty, exams, or interview cheating is prohibited. By using this tool, you acknowledge that YOU assume 100% of the risk. If you are banned, fired, or sued, it is your fault. Hexoran bears zero liability.