Developer Guides
Practical, no-fluff articles from the team behind GetSet Tools — the stuff we wish someone had written down before we learned it the hard way.
WebP vs AVIF vs PNG vs JPG: Choosing the Right Image Format in 2026
A practical comparison of the four dominant web image formats — compression behavior, browser support, transparency, and when each one is the wrong choice.
DataCSV, JSON and XLSX: The Conversion Pitfalls That Corrupt Your Data
Leading zeros vanish, dates mutate, encodings break, nested objects flatten lossily. A field guide to the classic data-conversion traps and how to avoid each one.
CodeMinify vs Beautify: What Code Formatting Actually Does to Your Files
What minifiers really remove, why gzip changes the math, when formatting is a correctness issue, and how source maps let you have both.
CSSGlassmorphism, Gradients and Shadows: Modern CSS Effects Done Right
How backdrop-filter, layered box-shadows and OKLCH gradients actually work, what they cost in rendering performance, and the accessibility lines you should not cross.
AIWhat Is a Token? How LLMs Split Text and Why Your API Bill Depends on It
Byte-pair encoding in plain language: why "strawberry" is one token but "strawberrys" is three, how different models tokenize the same text, and how to estimate cost before you call the API.
SVGSVG Optimization: Why Your Vector Files Are 10× Bigger Than They Need to Be
Editor metadata, path precision, and needless groups bloat exported SVGs. What is safe to strip, what breaks, and when an SVG should be inline, external, or a data URI.
AccessibilityWCAG Color Contrast: What 4.5:1 Actually Means and How to Hit It
How contrast ratio is computed, the difference between AA and AAA, the large-text exception, why gray-on-white designs fail, and how OKLCH makes fixing contrast systematic.
SEOOpen Graph and Meta Tags: Controlling How Your Links Look Everywhere
The minimum viable tag set for rich link previews, correct image dimensions, Twitter card fallback rules, JSON-LD structured data, and the caching gotchas that keep old previews alive.
SecurityPassword Entropy: Why "Tr0ub4dor&3" Loses to Four Random Words
How entropy is actually calculated, why substitution tricks add almost nothing, what crack-time estimates assume, and where generated passwords and passphrases each belong.
QRHow QR Codes Work: Error Correction, Versions, and Designing Codes That Scan
What the patterns in a QR code actually encode, how Reed–Solomon error correction lets codes survive logos and damage, and the practical rules for size, contrast and print.
CodeHow to Read a Diff — and Resolve Merge Conflicts Without Losing Work
Unified diffs, hunks, conflict markers, three-way merges, and the habits that stop "resolved" conflicts from silently deleting a colleague’s code.
DataJSON Beyond the Basics: Validation, JSON Schema and Querying with JSONPath
What "valid JSON" actually means, the errors that break parsers, how JSON Schema enforces structure, and how JSONPath lets you query a payload without writing a script.
EngineeringUnit Conversion Mistakes That Sink Projects: Precision, Rounding and Context
From the Mars Climate Orbiter to a recipe that fails in another kitchen — why unit conversion goes wrong, what exact versus defined factors mean, and how to keep precision honest.
WebThe Complete Favicon Guide: Sizes, Formats and the Tags You Actually Need
Why favicons are more than a 16px icon now — SVG favicons, Apple touch icons, Android manifest icons, dark-mode variants, and the minimal tag set that covers every platform.
CodeRegular Expressions You Actually Use: A Practical Field Guide
The 20% of regex that solves 90% of problems — anchors, classes, quantifiers, groups and lookarounds — plus the catastrophic-backtracking trap and when not to use regex at all.
TestingGenerating Realistic Test Data: Why "John Doe" Hides Your Bugs
What good mock data looks like, the edge cases every dataset should contain, locale and Unicode traps, referential integrity, and why you should never test with production dumps.
WritingReadability Scores Explained: Flesch, Gunning Fog, and What They Can’t Tell You
How readability formulas actually compute their numbers, what a "grade 8" score means, why they are blind to meaning, and how to use word and sentence counts to write clearer prose.
Developer ContentCode Screenshots People Actually Read: Typography, Contrast and Sharing
How to make code images that stay legible on a phone — line length, font size, theme contrast, export resolution — and when a screenshot is the wrong format entirely.