Blog
By Siavash Ghanbari · Founder of Emojar
📐A4 vs Letter, in Pixels and Points: A Practical Size Guide
Why A4 halves into A5, how to turn paper sizes into pixels at 300 dpi, and which aspect ratios, resolutions and type sizes designers reuse most.
Tool GuideReferencePaper SizesDesign📏Average Sentence Length: A Readability Checklist
What's a good average sentence length, and how do you fix a draft that runs long? A practical checklist with a before-and-after example.
Tool GuideTextWritingReadability🎈Bar, psi, kPa and hPa: Pressure Conversions in Real Life
Tire pressure in bar or psi, weather in hPa or inHg, dive tanks and blood pressure in mmHg. Real scenarios for converting pressure, and the gauge trap.
Tool GuideUnitsCarsConversion🖼️Base64 String Won't Turn Into an Image? Common Causes and Fixes
Pasted a Base64 string and got an error or a broken preview? Learn how to spot the image type from the first characters and fix the usual copy-paste mistakes.
Tool GuideImageBase64Images📐Black Bars, Stretched Faces and Odd Pixel Sizes, Fixed
Letterboxing, squashed exports and blurry thumbnails usually come from one mismatched number. Learn to spot it and work out the size that keeps proportions.
Tool GuideCalculatorsImagesVideo🔥BMR vs TDEE: Which Calorie Number Should You Use?
Your BMR is what you burn at rest; your TDEE is what you burn on a normal day. See how both are estimated and which one to plan meals around.
Tool GuideCalculatorsHealthNutrition🧷Broken String Literals: Fixing Quotes, Backslashes and
Why a Windows path turns into a tab, why JSON rejects your quotes, and why O'Brien breaks SQL. Six escaping symptoms, their causes and the fix for each.
Tool GuideDeveloperDevelopersDebugging🧪Build and Debug a JavaScript Regex Step by Step
A worked example: build a log-parsing regex one piece at a time, use named groups, flags and a replace preview, and learn to spot catastrophic backtracking.
Tool GuideDeveloperRegexJavaScript👟Buying Shoes From Another Country? A Sizing Walkthrough
Ordering EU or UK shoes with a US size, or the other way round? Follow one real purchase from measuring your foot to picking the size, with the numbers.
Tool GuideUnitsShoesSizing⚡Calories, Kilojoules, kWh and BTU: 6 Real Uses for Energy Units
Food labels, electricity bills, air conditioners and batteries all measure energy in different units. Six practical conversions with worked numbers.
Tool GuideUnitsScienceConversion※Check Marks, Arrows, Currency Signs: Which Symbol to Pick
✓ or ✅? → or ⇒? A guide to choosing text symbols that render everywhere, avoiding lookalikes, and using them in HTML and CSS.
Tool GuideTextUnicodeSymbols🪶Cleaning Up an Exported SVG Icon Before It Goes on Your Site
A walkthrough of shrinking a design-tool SVG from 976 to 335 bytes with SVGO, which settings matter, and the two cases where optimizing can break things.
Tool GuideDeveloperSVGWeb Performance⌨️Cmd or Ctrl? Why Shortcuts Differ on Mac, Windows and Linux
How the Command, Control, Option and Windows keys map to each other, where the simple Cmd-equals-Ctrl rule breaks, and how to find any shortcut fast.
Tool GuideReferenceKeyboardsProductivity🪙Coin Flip Myths: Streaks, Luck and the Gambler's Fallacy
After five heads, is tails due? Is 50 out of 100 the normal result? Five coin-flip myths tested with real probabilities, plus how to make a flip actually fair.
Tool GuideGeneratorsRandomProbability🌈Complementary, Analogous or Triadic? Choosing a Color Scheme
A decision guide to the seven color harmony rules, what each one produces from a single base color, and which to pick for websites, brands and slides.
Tool GuideColorDesignDecision Guide⬇️Convert Markdown to HTML for a CMS, Newsletter or Static Page
Write in Markdown, publish as HTML. See what tables, task lists and code blocks turn into, when to switch off GFM, and why raw HTML needs sanitizing.
Tool GuideDeveloperMarkdownHTML📅Counting Days for Deadlines, Notice Periods and Trips
Return windows, notice periods, countdowns and month-end deadlines: real scenarios for counting days between dates and adding time, with worked answers.
Tool GuideCalculatorsDatesPlanning🌅CSS Gradient Checklist: Angles, Stops and No Muddy Middles
Nine practical tips for better CSS gradients, from fixing the gray dead zone between complementary colors to hard stops, angles and readable text.
Tool GuideColorCSSDesign▦CSS Grid Lines, Tracks and fr Units, Explained Visually
How grid-template-columns, the fr unit and numbered grid lines work together, with a holy-grail layout you can build, resize and copy as CSS.
Tool GuideDeveloperCSSGrid🖥️CSS Pixels vs Physical Pixels: Why a 4K Screen Says 2560
Your 4K monitor reports 2560 × 1440 and your phone claims 390 pixels wide. Learn how display scaling and pixel ratio work, with a worked example.
Tool GuideDevice TestsDevicesDisplays