Blog
By Siavash Ghanbari ยท Founder of Emojar
๐HEX, RGB, HSL, HSV or CMYK: Which Color Format Fits the Job?
Five color formats, five different jobs. Where each one belongs, from CSS and design handoff to color pickers and print, with one color shown in all five.
Tool GuideColorDesignUse CasesโฐHow a Browser Alarm Clock Works and When You Can Trust It
Why an online alarm needs an open tab and an awake device, how sounds and snooze work behind the scenes, and when your phone alarm is the safer choice.
Tool GuideDate & TimeAlarmsTime๐งฎHow a Structural JSON Diff Works, and Why Line Diffs Mislead
Reordered keys and reformatting make line diffs useless for JSON. Learn how a structural diff compares values by path, and how arrays trip it up.
Tool GuideDeveloperJSONDebugging๐How Base64 Encoding Works, Byte by Byte (With UTF-8)
See exactly how text becomes Base64: bytes to 6-bit groups, why padding exists, why output is a third bigger, and how emoji and URL-safe Base64URL fit in.
Tool GuideDeveloperBase64Encodingใฐ๏ธHow Bรฉzier Curves Work, with B(t) Calculated Step by Step
The Bernstein formula and de Casteljau's algorithm explained with real numbers, plus how a cubic Bรฉzier becomes an SVG path or a CSS cubic-bezier().
Tool GuideReferenceBezier CurvesGeometryโ How Braille Works, From Dot Numbers to Capital and Number Signs
How the six-dot braille cell encodes letters, numbers and punctuation, what the capital and number signs do, and why most real braille is contracted.
Tool GuideTextBrailleAccessibility๐ผ๏ธHow Code Screenshot Generators Work, From Tokens to PNG
What happens between pasting code and downloading a polished PNG: syntax tokens, theme colors, canvas layout and 2ร export, explained with practical tips.
Tool GuideDeveloperCodeImages๐๏ธHow Color Blindness Simulation Works and How to Check a Palette
What protanopia, deuteranopia and tritanopia do to colors, how the Machado 2009 model simulates them, and how to find palette pairs that collide.
Tool GuideColorColor BlindnessAccessibility๐นHow Compound Interest Works, With Real Numbers
Interest on interest, the rule of 72, compounding frequency and why starting early beats saving more later, all explained with worked examples.
Tool GuideCalculatorsFinanceSavingsโ๏ธHow CSS Flexbox Shares Space, Explained With a Live Playground
Learn how flex-direction, justify-content, align-items and the flex shorthand decide where boxes go, then try each one on live items and copy the CSS.
Tool GuideDeveloperCSSFlexbox๐ฒHow Do Offset, Blur and Spread Shape a CSS Box Shadow?
What each of the four box-shadow lengths does, why layered low-opacity shadows look real, and how to put a shadow on one side only.
Tool GuideDeveloperCSSWeb DesignโฌญHow Does border-radius Make Pills, Circles and Blobs?
How the border-radius shorthand assigns corners, what the slash does, why 50% makes a circle and 9999px a pill, and how blob shapes are built.
Tool GuideDeveloperCSSWeb Design๐How Editing a PDF Works: Layers, White-Out and Fonts
Why a browser PDF editor adds a layer instead of rewriting text, what white-out really hides, and how to fix a typo so the change looks natural.
Tool GuidePDFEditingExplainer๐ณHow EMI Is Calculated, Month by Month
Your EMI stays the same every month, but the interest inside it keeps shrinking. A step-by-step look at how loan instalments work, with real numbers.
Tool GuideCalculatorsFinanceLoans๐ณ๏ธHow Flag Emoji Work, and Why Windows Shows Letters Instead
Flag emoji are two hidden letters that spell a country code. How regional indicator symbols work, why Windows shows DE instead of a flag, and how to quiz yourself.
Tool GuideReferenceFlagsEmoji๐ฃHow Image to ASCII Art Works, From Pixels to Characters
How a photo becomes a picture made of text. Brightness, cell size, character ramps and why rows are halved, with a worked example you can check yourself.
Tool GuideImageASCII ArtImages๐กHow Morse Code Works: Dots, Dashes, Spacing and Timing
Why E is one dot and Q is four symbols, how the 1-3-7 timing rule works, and how to write and decode Morse correctly as text, with worked examples.
Tool GuideTextMorse CodeExplainer๐ก๏ธHow Password Strength Checkers Estimate Crack Time
See how a strength checker turns a password into bits and crack times, why P@ssw0rd! scores as very weak, and how a breach check works without sending it.
Tool GuideGeneratorsSecurityPasswords๐How PDF Grayscale Conversion Works, and Which Mode to Pick
Grayscale, black & white or scanned look? What each mode does to text, colors and file size, with the math that turns red, orange and yellow into gray.
Tool GuidePDFGrayscalePrinting๐How PDF Page Rotation Works (and Why It Sometimes Won't Save)
You rotated a PDF in your viewer, reopened it, and it's sideways again. Here's how PDF rotation really works and how to make it stick, page by page.
Tool GuidePDFRotateExplainer