Blog
By Siavash Ghanbari · Founder of Emojar
📊CSV to JSON Checklist: Types, Quotes, Headers and Zeros
A pre-flight checklist for converting CSV to JSON without surprises: mixed column types, quoted commas, blank headers, delimiters and leading zeros.
Tool GuideDeveloperCSVJSON📐Degrees vs Radians (and Gradians): When to Use Each
Why does sin(90) give 0.894 in code? Learn when to use degrees, radians, gradians and arcminutes, how to convert between them and the mistakes to avoid.
Tool GuideUnitsMathProgramming🗑️Deleting PDF Pages: A Checklist for a Clean Result
Remove blank, duplicate or private pages from a PDF without surprises. What to check first, how to select pages fast, and what the new file keeps.
Tool GuidePDFPagesChecklist🎲Dice Notation Explained: 2d6, d20, 3d8+2 and 4d6kh3
What NdS±M means, how keep-highest rolls like 4d6kh3 and advantage work, and the averages and odds behind the most common tabletop dice rolls.
Tool GuideGeneratorsGamesRandom🔄Does CSS Transform Order Matter? Rotate, Scale and matrix()
How translate, rotate, scale and skew combine, why their order changes the result, what transform-origin does, and how a list becomes one matrix().
Tool GuideDeveloperCSSFront End✉️Email Signature Broken in Gmail or Outlook? Common Fixes
Missing photo, lost formatting, a dead phone link or a vanished email address? Here is why email signatures break and how to fix each problem quickly.
Tool GuideGeneratorsEmailSignatures🧰Emoji 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 GuideEmojiUnicodeReference🧰Emoji Letters: Regional Indicators, 🅰️ and the Alphabet in Emoji
The three ways to write letters with emojis — regional indicator letters, the 🅰️ 🅱️ buttons and look-alike emojis — and why some of them turn into flags.
Tool GuideEmojiUnicodeFun🔗encodeURI vs encodeURIComponent: Which One Should You Use?
One encodes a whole URL, the other a single value. Side-by-side output, a decision table, and the bugs you get when you pick the wrong one.
Tool GuideDeveloperURLsJavaScript♟️FEN Notation Explained: The Six Fields of a Chess Position
How Forsyth–Edwards Notation records piece placement, side to move, castling, en passant and the move counters, with a worked example after 1.e4 c5.
Tool GuideReferenceChessNotation🕘Filling In a Weekly Time Card: Three Real Weeks, Worked Through
An office week, a run of night shifts and a four-day 10-hour schedule, each totaled with breaks and overtime so you can check your own pay.
Tool GuideDate & TimeTime CardOvertime🔍Find and Replace With Regex: 8 Recipes and a Safety Checklist
Copy-ready regex patterns for reformatting dates, phone numbers, spaces and line breaks, plus a checklist to avoid replacing more than you meant to.
Tool GuideTextRegexText Editing🔀Fixing a Scanned PDF With Pages in the Wrong Order
Scanned a double-sided document and got pages 1, 3, 5, then 10, 8, 6? Here's how to put a PDF back in order with thumbnails or a single typed sequence.
Tool GuidePDFScanningHow-to🪞Flip, Mirror or Rotate? 5 Myths About Flipping Images
Is flipping vertically the same as rotating 180°? Are selfies really reversed? Five common myths about mirroring images, and what actually happens.
Tool GuideImageImagesFlip➗Fraction Math for Woodworking: Planning a Shelf Cut List
Tape measures speak in eighths and sixteenths. Walk through a real shelf cut list, adding, multiplying and dividing mixed numbers without a slip.
Tool GuideCalculatorsMathDIY📮From Form to Code: Build HTTP Requests for cURL, fetch and Python
How an HTTP request is put together, why a browser tool can't just send it for you (CORS), and a worked example turned into cURL, fetch and Python code.
Tool GuideDeveloperHTTPAPI↩️Hard vs Soft Line Breaks: How Broken Lines Get Joined Back
Why text copied from PDFs and emails arrives chopped into short lines, and how line-break removal rebuilds paragraphs, fixes split words and keeps gaps.
Tool GuideTextPDFHow it works📶Hertz to RPM, MHz and GHz: Frequency Explained Simply
What does 60 Hz, 7,200 rpm or 2.4 GHz actually mean? A plain-English guide to frequency units, with conversions for audio, radio, Wi-Fi, displays and motors.
Tool GuideUnitsTechExplainer🎨HEX to HSL: Build Shades, Hover States and Themes
Convert a brand HEX code to HSL and you can create lighter, darker and hover variants by changing one number. A practical guide with a full shade scale.
Tool GuideColorCSSTheming🎨HEX to RGB in CSS: Adding Transparency to Brand Colors
Why developers convert HEX to RGB, how to add transparency with rgb() and 8-digit HEX, and a reusable CSS variable pattern for see-through brand colors.
Tool GuideColorCSSWeb Development