70+ Interactive Cheatsheets · Free Forever · Always Expanding

Study Smarter. Learn Faster.

Interactive cheatsheets for Programming, Mathematics, Science, Exams, English and more. Copy code, use offline, designed for real learning — not just reading.

70+

Cheatsheets

10

Categories

🇵🇰

MDCAT · ECAT · SAT

100%

Free

💻

Programming Languages

12 sheets

Python Complete Cheatsheet

Variables, loops, functions, OOP, file I/O, libraries — everything in one place with runnable examples

Python 3.x Beginner → Advanced Interactive

JavaScript Cheatsheet

ES6+, DOM, async/await, closures, prototypes and modern JS patterns

ES6+Interactive

Pointers, memory management, STL, templates, OOP — full C++ reference

Java Cheatsheet

OOP, Collections, Streams, multithreading, Spring basics

SQL Complete Cheatsheet

SELECT, JOINs, subqueries, indexes, transactions — full SQL reference with examples

Git & GitHub Cheatsheet

Commands, branching, merging, rebasing, pull requests — full workflow guide

Data Structures & Algorithms

Arrays, linked lists, trees, graphs, sorting, searching — complete DSA reference

DSAPython + C++

C# Complete Cheatsheet

Syntax, OOP, LINQ, async/await and generics — full C# quick-reference

Go (Golang) Cheatsheet

Syntax, goroutines, channels and standard library — Go quick-reference

PHP Complete Cheatsheet

Syntax, arrays, OOP, PDO and common functions — full PHP quick-reference

Rust Cheatsheet

Ownership, borrowing, error handling and Cargo — Rust quick-reference

TypeScript Cheatsheet

Types, interfaces, generics, decorators and advanced patterns — complete TS reference

🌐

Web Development

14 sheets

HTML + CSS Complete Cheatsheet

All HTML5 tags, CSS properties, Flexbox, Grid, animations, selectors — with live preview examples

HTML5CSS3Interactive

React.js Cheatsheet

Components, hooks, state, props, useEffect, context, routing

Node.js + Express Cheatsheet

HTTP server, REST APIs, middleware, authentication, databases

Flexbox & Grid Visual Guide

Visual interactive guide to CSS Flexbox and Grid with live editable examples

CSS LayoutVisual

Tailwind CSS Cheatsheet

All utility classes: spacing, typography, colors, flexbox, grid, transitions

APIs & REST Cheatsheet

HTTP methods, status codes, authentication and JSON — free API quick-reference

Cloud Computing Cheatsheet

AWS, Azure, GCP services and key concepts — free cloud quick-reference

MongoDB Cheatsheet

CRUD, aggregation pipeline, indexes and Atlas — free MongoDB quick-reference

Next.js Cheatsheet

App Router, pages, API routes and data fetching — free Next.js quick-reference

Cybersecurity Cheatsheet

Threats, encryption, OWASP and security best practices — free security quick-reference

System Design Cheatsheet

Scalability, caching, databases and microservices — free system design quick-reference

Blockchain Cheatsheet

Consensus, smart contracts and DeFi — free blockchain quick-reference

🤖

AI & Data Science

4 sheets

Machine Learning Fundamentals

Supervised vs unsupervised, regression, classification, clustering, model evaluation — full ML roadmap with Python examples

Pandas & NumPy Cheatsheet

DataFrames, Series, filtering, groupby, arrays, indexing, broadcasting — complete Pandas + NumPy reference

Pandas 2.xNumPy

Statistics for Data Science

Mean, variance, distributions, hypothesis testing, p-values, correlation

Deep Learning Cheatsheet

Neural networks, CNNs, RNNs and optimizers — free deep learning quick-reference

🔢

Mathematics

8 sheets

Master Formula Sheet

Algebra, geometry, trigonometry, calculus, statistics — every important formula with explanations and worked examples

All LevelsPrintable

Algebra Cheatsheet

Equations, inequalities, polynomials, factoring, quadratic formula, matrices

Calculus Cheatsheet

Limits, derivatives, integrals, chain rule, product rule, integration by parts

A-Level / Grade 12

Trigonometry Cheatsheet

Sin/cos/tan, identities, sine rule, cosine rule, unit circle, graphs

Statistics & Probability

Mean, median, mode, variance, probability, distributions, hypothesis testing

🔬

Science

8 sheets

Biology Complete Cheatsheet

Cell biology, genetics, human body, ecology, photosynthesis, evolution — O/A Level biology

Chemistry Cheatsheet

Periodic table, bonding, reactions, organic chemistry, stoichiometry

Physics Cheatsheet

Mechanics, waves, electricity, thermodynamics, nuclear — all formulas and laws

📖

English Language & Literature

5 sheets

English Grammar Complete Sheet

Parts of speech, tenses, punctuation, sentence structure, active/passive voice, common errors — with examples

GrammarAll Levels

Literary Devices Cheatsheet

Metaphor, simile, personification, irony, symbolism — all 30+ devices with examples

Essay Writing Guide

Structure, thesis statements, paragraph writing, transitions, conclusions — complete writing guide

🎯

Exam Preparation

4 sheets

MDCAT Quick Reference

Biology, chemistry, physics, English — all key MDCAT topics in one fast-access sheet

ECAT Formula Sheet

Maths, physics, chemistry — all ECAT formulas, concepts and quick revision points

SAT Quick Guide

Math, reading, writing — SAT structure, key formulas and strategies

💼

Career & Productivity

7 sheets

Resume Writing Guide

ATS-friendly structure, bullet writing, action verbs, skills section — with templates

Linux & Terminal Commands

File system, permissions, processes, networking, bash scripting — essential terminal commands

Computer Networking Basics

OSI model, TCP/IP, DNS, HTTP, subnetting, protocols — networking essentials

Interview Preparation Guide

STAR method, common questions, technical interviews, behavioural questions

Communication Skills Cheatsheet

Public speaking, writing and workplace tips — free communication reference

Study Techniques Cheatsheet

Active recall, spaced repetition and note-taking methods — free study quick-reference

Time Management Cheatsheet

Prioritization, scheduling and productivity techniques — free time management reference

🌐

Global Exams & Languages

5 sheets

MDCAT Subject Notes

Detailed subject-wise notes for MDCAT preparation — biology, chemistry, physics

Key concepts, Quran verses, Hadith, Islamic history — Matric & FSc Islamiat

Pakistan Studies

Geography, history, economy, culture — complete Pakistan Studies cheatsheet

Urdu Grammar Guide

Parts of speech, sentence structure, essay writing — complete Urdu grammar reference

IELTS Preparation

Reading, writing, speaking, listening — strategies, band descriptors, key vocab