Simple &amp; Easy Programming Learning

2 🔧 🔥 HOT

JSON Formatter

Format, validate & explore JSON — 100% private

654K users

3 🔍

Regex Tester

Live match highlighting, groups & replace mode

412K users

4 🔐

Base64 Encoder

Encode & decode Base64 — supports file upload

345K users

5 📱 ⭐ ESSENTIAL

QR Generator

Generate QR codes for URL, WiFi, email, SMS & more

287K users

6 🎨 ⭐ ESSENTIAL

Color Picker

HEX, RGB, HSL, CMYK conversions & shade palettes

265K users

7 🌐

HTML Formatter

Beautify & validate HTML5 with syntax highlighting

198K users

8 🖌️

CSS Formatter

Beautify, minify & validate CSS instantly

187K users

9 ⚡

JS Formatter

Beautify JavaScript — K&R, Allman, Stroustrup styles

175K users

10 📝 ⭐ ESSENTIAL

Markdown Editor

Write Markdown with live preview & toolbar

143K users

11 📧 ✨ NEW

Email Verifier

Validate email format, MX records & detect disposable

128K users

12 🌍

DNS Lookup

Query A, MX, NS, TXT, CNAME & all DNS record types

110K users

13 🔎

WHOIS Lookup

Domain registration, expiry & ownership information

98K users

14 🛡️ ✨ NEW

Port Scanner

Scan open TCP ports on any host or server

87K users

15 🗄️

SQL Formatter

Format & beautify SQL — MySQL, PostgreSQL & T-SQL

76K users

Latest Tutorials

Fresh tutorials published regularly — all free for Pakistani students

Design a File Storage System S3 like Object Storage

Design an object storage service — metadata service, chunking, replication, consistency, and CDN integration.

Design a Notification System Push Email & In App

Design a scalable notification system — channels, templates, priority queues, rate limiting, and user preferences.

Design a Rate Limiter Algorithms & Implementation

Implement rate limiting — token bucket, sliding window, fixed window, Redis-based, and distributed rate limiting.

Design a Chat Application System Design Interview Guide

Design a real-time chat system — WebSockets, message queue, delivery guarantees, presence, and group chat.

Design a URL Shortener System Design Interview Guide

Design a URL shortener — requirements, API, database schema, hashing, caching, analytics, and scaling strategy.

Bloom Filters & Probabilistic Data Structures Tutorial

Understand probabilistic structures — Bloom filters, Count-Min Sketch, HyperLogLog, and when to use them.

Zaheer Ahmad • Apr 15 • 4 min read min

Suffix Array & Suffix Tree String Algorithms Tutorial

Solve string problems with suffix arrays — construction, LCP array, pattern matching, and longest common substring.

Union Find Disjoint Set Kruskal's MST & Connected Components

Track connected groups with Union-Find — path compression, union by rank, cycle detection, and Kruskal's MST.

Zaheer Ahmad • Apr 14 • 6 min read min

Segment Trees Tutorial Range Queries & Lazy Propagation

Handle range queries efficiently — segment tree build, query, update, lazy propagation, and persistent variants.

Trie Data Structure Prefix Trees & Autocomplete

Build fast prefix lookups with tries — insert, search, prefix match, autocomplete, and word frequency counting.

Email Authentication SPF DKIM & DMARC Setup Guide

Protect your domain's email — SPF records, DKIM signing, DMARC policies, and troubleshooting deliverability.

Zaheer Ahmad • Apr 14 • 6 min read min

SendGrid & Resend Tutorial Transactional Email APIs

Send transactional emails — SendGrid and Resend APIs, templates, webhooks, deliverability, and Node.js integration.

MJML Tutorial Build Responsive HTML Emails 2026

Create responsive emails with MJML — components, layouts, images, and converting to HTML for email clients.

WordPress REST API Headless WordPress with React Next js

Use WordPress as a headless CMS — REST API endpoints, custom post types, ACF fields, and React/Next.js frontend.

Contentful Tutorial Enterprise Headless CMS Guide

Build with Contentful — content models, Content Delivery API, Rich Text rendering, and localization.

Sanity io Tutorial Structured Content Platform Guide

Manage content with Sanity — schemas, GROQ queries, Sanity Studio, image pipeline, and Next.js integration.

Payload CMS Tutorial TypeScript First Headless CMS

Build with Payload CMS — collections, fields, hooks, access control, and deploying with Next.js.

Strapi Tutorial Headless CMS with Node js 2026

Build content APIs with Strapi — content types, REST/GraphQL, authentication, media, and custom plugins.

WooCommerce Development Custom Themes & Plugins Guide

Customize WooCommerce — child themes, custom product types, payment gateways, and REST API integration.

JazzCash & Easypaisa Integration Pakistani Payment Gateways

Integrate Pakistani payment gateways — JazzCash API, Easypaisa API, payment flow, webhooks, and testing.

Stripe Integration Tutorial Payments Subscriptions & Checkout

Accept payments with Stripe — Checkout sessions, PaymentIntents, subscriptions, webhooks, and Pakistani PKR support.

Medusa js Tutorial Open Source E commerce Backend 2026

Build headless e-commerce with Medusa.js — products, carts, payments, shipping, and custom plugins.

Shopify Development Tutorial Themes Liquid & Apps 2026

Build on Shopify — Liquid templating, theme architecture, Shopify CLI, and custom app development.

RTL Right to Left Support Arabic & Urdu Web Design

Build RTL-compatible websites for Urdu and Arabic — dir attribute, logical CSS properties, bidirectional text, and testing.