Blog
By Siavash Ghanbari · Founder of Emojar
↔️Why Your "Days Between Dates" Count Is Off by One
Counting days between two dates gives different answers depending on whether you count nights or days. How to get the number you actually need, with examples.
Tool GuideDate & TimeDatesCalculators♿Why Your Colors Fail WCAG Contrast (and How to Fix Them)
Gray text that looks fine, a brand blue that fails, white on yellow: the most common WCAG contrast failures, what causes them, and how to fix each one.
Tool GuideColorAccessibilityTroubleshooting🥄Why Your Cups-to-Grams Conversion Went Wrong (and How to Fix It)
Dense cookies, runny batter, salty bread? Most recipe conversion mistakes come from five causes. Here is how to spot each one and convert correctly.
Tool GuideUnitsCookingBakingxⁿWhy Your Exponent Answer Looks Wrong, and How to Fix It
Got 1.9999986 instead of 2, an error for a negative base, or "Too large to display"? Here is what each exponent result means and how to get the answer you want.
Tool GuideCalculatorsMathTroubleshooting🔢Why Your Hex or Binary Conversion Looks Wrong, and How to Fix It
Got 4112 when you expected 10, or an error about an invalid digit? The seven most common base-conversion mistakes, with worked examples and fixes.
Tool GuideDeveloperBinaryHexadecimal🧹Why Your List Still Has Duplicates (and How to Fix It)
You removed duplicates but some still look identical. Here's what makes two lines different behind the scenes, from capital letters to invisible spaces.
Tool GuideTextData CleaningLists💹Why Your ROI Number Looks Wrong, and How to Fix It
A 45% return can mean 13% a year or 6% a year. Seven common ROI mistakes, from ignoring time and fees to short holding periods, with worked fixes.
Tool GuideCalculatorsFinanceInvesting📃Word to PDF in Your Browser: Convert or Print to PDF?
Two ways to turn a .docx into a PDF without uploading it, and what each keeps or drops. A guide to choosing between Convert to PDF and Print / Save as PDF.
Tool GuidePDFWordDecision guide🔁YAML to JSON: Fixing Indentation Errors and Type Surprises
Why YAML fails to parse, and why it sometimes parses into values you didn't expect. Indentation, tabs, anchors, versions like 1.10, explained with examples.
Tool GuideDeveloperYAMLJSON📈5 Percentage Increase Myths That Trip Up Smart People
Why doesn't a 50% rise followed by a 50% drop get you back to where you started? Five common percentage-change myths, debunked with simple numbers.
Tool GuideCalculatorsMathFinance🎯How to Get the Exact Color Code From a Logo or Screenshot
Need the HEX code of a brand color you only have as an image? A walkthrough of picking it accurately, and why your first click is often slightly off.
Tool GuideColorDesignHow-to🔲How to Split a Photo Into an Instagram Grid That Lines Up
A start-to-finish walkthrough of turning one wide photo into a 3×3 Instagram puzzle, with real tile sizes, the right posting order and the pitfalls to avoid.
Tool GuideImageImagesInstagram⚖️Kilograms, Pounds, Stone and Tons: A Practical Guide
Luggage limits, body weight in stone, recipes in ounces, short vs long tons and carats. Real-life weight conversions worked out with exact factors.
Tool GuideUnitsConversionTravel🗝️Passphrase vs Password - Which Should You Use, and When?
Random-word passphrases and random-character passwords can be equally strong. Here's how to choose between them and how many words you really need.
Tool GuideGeneratorsSecurityPasswords🕰️What Is a Unix Timestamp? Epoch Time Explained Simply
How Unix time counts seconds from 1970, why some timestamps have 13 digits, what the year 2038 problem is, and how to convert epoch time to a readable date.
Tool GuideDate & TimeDevelopersTime🔤7 Practical Ways to Add Text to a Photo (With Settings)
Event flyers, labeled screenshots, dated family photos and more. Seven everyday uses for text on a photo, with the font, size and position for each.
Tool GuideImageImagesText✂️Aspect Ratio Cheat Sheet: Cropping Images the Right Way
1:1, 4:5, 16:9 or 9:16? A practical cheat sheet for choosing an aspect ratio, cropping with exact pixels, and avoiding the classic framing mistakes.
Tool GuideImageImagesCrop🔁Converting JSON to YAML for Kubernetes and CI Configs
Turn JSON into clean YAML for manifests and pipelines, and avoid the type traps (yes, no, dates) that make the same file parse differently in different tools.
Tool GuideDeveloperYAMLJSON🤰How Pregnancy Due Dates Are Calculated, With Examples
Why pregnancy is counted from your last period, how cycle length, conception dates and IVF transfers change the math, and what your milestone dates mean.
Tool GuideCalculatorsHealthPregnancy🗜️Lossless vs Strong PDF Compression – Which One Do You Need?
Lossless keeps text searchable; Strong turns pages into images and can shrink scans dramatically. How to choose a mode, DPI and quality for your PDF.
Tool GuidePDFCompressionGuide