Blog
By Siavash Ghanbari ยท Founder of Emojar
๐A4 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 SizesDesignโจ๏ธCmd 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 GuideReferenceKeyboardsProductivity๐งฐEmoji Categories Explained: The 10 Groups and What Is in Them
Why there are exactly ten emoji categories, how many emojis each holds, why People & Body is so large, and what the odd Component group is for.
Tool GuideEmojiUnicodeReferenceโ๏ธFEN Notation Explained: The Six Fields of a Chess Position
How ForsythโEdwards Notation records piece placement, side to move, castling, en passant and the move counters, with a worked example after 1.e4 c5.
Tool GuideReferenceChessNotationใฐ๏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 CurvesGeometry๐ณ๏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 to Find Any Unicode Character, Its Code Point and Its Bytes
Look up a character by name, number or paste, then read its code point, block, category, UTF-8 bytes and escapes. Here is what each value means and when you need it.
Tool GuideReferenceUnicodeEncodingโ๏ธHow to Read the Periodic Table, With Iron as a Worked Example
What periods, groups, blocks and bracketed masses mean, and how to look up any element's configuration, melting point and density in seconds.
Tool GuideReferenceChemistryPeriodic TableโHow to Type Math Symbols in Documents, LaTeX and HTML
One symbol, three forms. How to choose between pasting โ, writing \sum in LaTeX or using an HTML entity, and how to avoid look-alikes such as ฮฃ versus โ.
Tool GuideReferenceMathLaTeX๐ISO Country Codes Explained, From Alpha-2 to Numeric
What the two-letter, three-letter and numeric country codes in ISO 3166-1 mean, how they relate to currency codes, domains and calling codes, and where they differ.
Tool GuideReferenceGeographyStandards๐PDF Page Ranges Explained: 1-3, 7, 10- and Other Tricks
Learn the page range syntax for pulling pages out of a PDF, including open ranges, reverse order, duplicates and odd/even, with ready-to-copy examples.
Tool GuidePDFPagesReference