
How to Create a Professional Invoice (Free, With Tax Done Right)
What a valid invoice actually needs, how to number invoices for an audit, which VAT or GST rate to charge, and how to produce a real PDF without paying for invoicing software.

A passionate Senior Software Engineer with extensive experience in building enterprise-grade applications using modern technologies. His expertise spans across full-stack development with specialization in Laravel, Next.js, and Express.js. He has a proven track record of delivering high-quality software solutions that drive business growth, and he focuses on creating scalable, maintainable, and performant applications that provide exceptional user experiences.
23 articles written by Muhammad Haroon

What a valid invoice actually needs, how to number invoices for an audit, which VAT or GST rate to charge, and how to produce a real PDF without paying for invoicing software.

WebAuthn Level 3 became a W3C Recommendation in August 2026, five years after Level 2, and passkeys now sit behind billions of active credentials. This guide walks through the cryptography that makes a passkey unphishable, the new Level 3 features, and a staged rollout plan for an app that still has password users.

A hands-on engineering guide to LLM tokens. We break down Byte-Pair Encoding quirks, hidden whitespace costs, prompt caching mechanics, and the exact context architecture that reduced our production AI bill by 68%.

Stop copy-pasting into random websites. Here's what Base64 encoding actually does, where it's used in real systems, and a free tool to encode and decode instantly.

Can twenty-five minutes of focused work change your productivity? Here's why the Pomodoro Technique works, how to customize it, and the mistakes most people make.

A practical workflow for merging, splitting, and compressing PDFs directly in your browser. No desktop software, no uploads.

Browser-based tools handle core processing locally on your device. Here is why local processing matters and how to find tools that prioritize user experience.

Everything you need to know about working with PDFs in 2026. Merging, splitting, compressing, converting, and editing PDFs without expensive software or uploading sensitive documents to unknown servers.

Real talk about meta tags in 2026. Learn the 5 that actually matter, the 50 you can delete, and how to make your links look good when shared.

A troubleshooting guide for failed merges, large PDFs, and common file problems, plus the quickest fixes.

Stop emailing ten separate attachments. Learn the fast, free way to combine and shrink PDFs in your browser without paying for expensive software.

Clients can't stop reading the fake text. Here's why designers use Lorem Ipsum and a generator that doesn't waste your time.

Skip expensive subscriptions. Combine PDFs in your browser with drag and drop, Core processing runs locally, and no software installation.

Images account for half of most webpages' total weight. Learn how to reduce file sizes, improve Core Web Vitals, and boost your SEO ranking without losing visual quality.

Rich snippets used to feel like magic. Now they're just JSON-LD. Here's how schema markup works, which types actually matter, and how to add it to your site in under ten minutes.

How text-to-speech AI is changing content creation, accessibility, and development workflows. What makes a voice sound natural, which tools are worth using, and why browser-based TTS runs locally.

QR codes went from dead to essential. Here's how they work, how to generate them for free, and the best practices for printing and marketing that most guides miss.

Gross pay versus net pay explained. Learn where your money goes, how taxes work, and how to plan financial decisions based on what you actually take home.

Build a job-winning resume effortlessly with our free online resume builder. ATS-friendly templates, live preview, and instant PDF export.

Learn how the open-source PocketMCP app uses the Model Context Protocol to bridge the gap between desktop AI agents and real-world mobile data.

Stuck at 40 WPM? I was too. Here's the specific practice routine, the mindset shift, and the tools I used to break the plateau and hit 100+ WPM.

Still using PNGs? Stop. We breakdown the compression algorithms of WebP and AVIF and why they are the future of the web.

Agentic AI is the biggest trend in artificial intelligence for 2026. Learn what autonomous AI agents are, how they differ from chatbots, real-world use cases, and why every developer should pay attention.