Guides & Tutorials

Five live data sources — BNA news, Manama weather, daily prayer times, BHD currency rates, and gold prices — aggregated into one free portal with no account required.

The 2026 F1 season introduces the biggest technical rules change in a decade — new hybrid engines, revised aero, and lighter cars that shuffle the competitive order from day one. Here is everything you need to follow it.

Most note-taking apps require an account and store your thoughts on someone else's server. Multi-Toolkit Notes works differently: everything stays in your browser's IndexedDB — private, offline-first, and free.

Designing an interface before the real content exists? Asset Forge generates lorem ipsum in 7 languages, placeholder images at exact pixel dimensions, and mock identity and financial data — all in your browser, nothing uploaded.

Most people know their age in years. Few know they are 10,000 days old around age 27, or that their 1-billion-second birthday happens at 31 years and 8 months. Here is how to calculate all of it.

The Hijri calendar is 354 days long, has 12 lunar months, and shifts roughly 11 days earlier each Gregorian year. Here is everything you need to understand it and convert dates accurately.

The 90-day limit does not reset on 1 January. It is a rolling 180-day window — and getting it wrong can result in a multi-year ban. Here is how to count it correctly.

The UAE changed its weekend in 2022. Saudi Arabia changed its in 2013. Most GCC public holidays are lunar-based and shift 11 days earlier each year. Here is what you need to know to count working days correctly.

Every GCC country has different leave rules — and many employees are unaware of what they are actually entitled to. Here is the complete breakdown by country.

UTC offset and timezone sound like the same thing — they are not. One is a number, the other is a rulebook. Here is why the difference matters every time you schedule a call across DST boundaries.

A single misconfigured robots.txt can block your entire site from Google. Here is everything you need to know to write it correctly — directives, common mistakes, and platform templates.

Lorem Ipsum has been the standard design placeholder for 500 years — but most designers don't know where it came from or when a different variant works better. Here's the full story.

Every programming language has naming rules, and mixing conventions is one of the most common code style violations. Here is when to use each of the 16 formats.

Most people type at 40–60 WPM. Getting to 80+ WPM is achievable with targeted practice. Here is how WPM is measured, what accuracy actually costs you, and how to improve both.

Whether you need one chapter, every page as its own file, or to fix a sideways scan, here is how to split and extract PDF pages privately in your browser.

Need a PDF page as an image for a slide, blog, or social post? Here is how to convert PDF to JPG or PNG in your browser — with the right format and resolution for the job.

A palette that looks great can still fail real users. Here is how to combine color harmony with WCAG contrast ratios to build a palette that is both beautiful and readable — with worked examples.

Minification is the cheapest performance win on the web: strip the bytes browsers ignore and your pages download and render faster. Here is how it works for CSS, HTML, and JavaScript — with before/after examples.

You don't need to memorise conversion factors. You need the 20 conversions that actually come up — in the kitchen, on a trip, at the gym, or mid-DIY-project. Here they are, with the math shown.

Every remittance service quotes a different rate. The gap between the mid-market rate and what you actually get can cost a Riyadh nurse or a Dubai engineer thousands of rupees a year — here is how to close it.

YAML is just JSON with less punctuation and comments. Here is how the conversion works and when to use YAML over JSON in your infrastructure configs.

JSON arrays map naturally to spreadsheet rows — but nested objects need special handling. Here is how the conversion works and how to get the cleanest CSV.

A wall of nested braces is impossible to read. A tree view collapses the noise and shows you exactly what is inside. Here is how to use one effectively.

JSONPath is the XPath of JSON — it lets you extract any value from a nested structure with a single expression. Here is the full syntax with examples.

Writing JSON Schema by hand is tedious. Here is how to auto-generate a draft-07 schema from any JSON sample — and how to put it to work in your pipeline.

Every byte matters in API responses and JavaScript bundles. Here is how JSON minification works and when to use it to cut payload size by 20–60%.

Two JSON responses that look identical can have subtle differences that break your app. A proper JSON diff tool finds them in seconds. Here is how to use one effectively.

Raw JSON from an API is often a wall of unreadable text. A good online editor formats, validates, and helps you explore it in seconds. Here is what to look for and how to use one.

Running an online store is a math problem. This guide covers the 8 calculators that answer the questions every seller faces: What is my true profit? When do I break even? What price should I charge?

BMI tells you where your weight sits relative to your height — but the number alone misses context. This guide covers the formula, the categories, and what BMI can and cannot tell you.

From calculating a tip to reversing a discount price, percentages show up everywhere. This guide covers all 7 calculation types with formulas you can apply immediately.

Sending five separate PDFs when one would do wastes everyone's time. This guide shows how to merge PDFs in seconds — and how to get the order right the first time.

A 20 MB PDF will bounce off email servers and fill up cloud storage fast. This guide explains how browser-based PDF compression works and how to pick the right level for your use case.

The right image format and quality setting cut file size by 60–80% with no visible difference. This guide walks through every decision — format, quality, dimensions — and shows the impact on Core Web Vitals.

Does word count matter for SEO? How long should a blog post be? What are the character limits for Twitter, Instagram, and SMS? All answered here.

A Unix timestamp is just a number — seconds since Jan 1 1970. Here is everything you need to know about converting it to a human-readable date.

Spaces become %20, & becomes %26 — but not all URL encoding functions work the same way. Here is when to use each one.

Base64 converts binary data to printable ASCII text. Here is how it works, when to use it, and how to encode or decode anything in the browser.

From New York, Qibla is north-east. From Sydney, it's north-west. Here's why — and how to find your exact Qibla direction using a live compass.

Prayer times are not arbitrary — they follow the precise position of the sun. Here's exactly how Fajr, Dhuhr, Asr, Maghrib, and Isha are calculated.

Broken links silently drain your SEO rankings and frustrate users. Here's how to find every dead link on your site and fix them before they cost you traffic.

Math.random() is not cryptographically secure. Here's how to generate real secrets that hold up against modern attacks — and where to store them safely.

Your JWT is failing in production — again. This guide shows you exactly what every part of a JWT means, how to decode it, and what security mistakes to avoid.

Compound interest turns modest monthly contributions into life-changing wealth — but only if you understand the variables. Here's how it actually works.

Your EMI hides more than just interest. Here's how to calculate it accurately, compare loan types, and use extra payments to pay off years faster.

Gratuity is one of the most valuable benefits for expatriate workers in the Gulf — but the rules differ significantly by country. Here's what every GCC employee should know.

Zakat is 2.5% of your net zakatable wealth held above Nisab for one lunar year — but what counts as "zakatable" depends on your madhab, and the Nisab threshold itself depends on whether you use gold or silver.

No income tax in any GCC country — but your actual take-home depends on basic vs package, social insurance, and gratuity. Here is exactly how to calculate it.

Whether you are raising a VAT invoice in Dubai or extracting VAT from a Riyadh receipt, this guide explains how VAT works across GCC and global markets — with worked examples.

Price too high and customers leave. Price too low and margins die. Here are six strategies that cover every situation — and how to blend them into the right number.

A 70% gross margin sounds great — until operating costs eat it to 5% net. Here is what each profit margin layer reveals, and how to benchmark yours by industry.

The break-even point is where total revenue equals total costs — you make zero profit or loss. Every unit sold above it is pure profit. Here is how to find yours.

GST splits into CGST + SGST for intra-state sales, and a single IGST for inter-state. Here is how to calculate each — including the reverse formula when the price already includes tax.

A 20% off + 10% extra sounds like 30% off. It is not. Here is how discount math actually works — and how to reverse it when you only know what you paid.

FBA profit is what is left after Amazon takes its referral fee, packs and ships your product, and stores it in a warehouse. Here is how to calculate it accurately.

Revenue is vanity. Profit is sanity. This guide shows every fee that eats into a Shopify sale — and how to calculate what you actually keep.

Schema markup is how you tell Google what your page means, not just what it says. Here is what it is, why it earns rich results, and how to add it.

Images are the biggest performance bottleneck on most websites. Here is how to compress them correctly — format, quality, dimensions — and what file size to target for a good LCP score.

Serving a 4,000 px photo in a 700 px column wastes bandwidth and tanks your LCP score. Here is how to resize images correctly — dimensions, format, and when to compress afterward.

Cropping removes the edges to change framing — it does not resize. Here is the right aspect ratio for every platform and the correct order: crop first, resize second, compress last.

Without UTM tags, Google Analytics lumps your social, email, and newsletter traffic into "Direct" — making campaign attribution impossible. Here is how to fix that.

If you have ever opened an API response and been greeted by a single endless line of curly braces, you already understand the problem JSON formatting solves.

Invalid JSON breaks APIs, configs, and builds. Here is how to validate JSON in seconds and fix the seven errors that cause almost every failure.

Most "invalid JSON" comes from a handful of fixable patterns — including pasting a Python dict. Here is how to repair each one automatically.

A QR code takes seconds to make once you know the few details that matter — content type, error correction, and the right export size.

Meta tags decide how your pages look in Google and on social media. Here is exactly which ones matter, how long they should be, and how to write them.

Hand-writing interfaces for an API response is slow and error-prone. Here is how to generate accurate TypeScript types from JSON in seconds.

Writing POJOs for a JSON API by hand is tedious. Here is how to generate complete Java classes — fields, constructors, and accessors — from JSON.

Stop hand-writing dataclasses for API responses. Here is how to generate correct, type-hinted Python dataclasses from JSON — including Optional fields.