Blog
Technical guides and best practices for developers.
QR Code Best Practices: When and Why to Use Them
Explore QR code standards, use cases, and best practices. Understand error correction levels, sizing, and when QR codes are the right choice.
Base64 Encoding Explained: How It Works and When to Use It
Learn what Base64 encoding is, how the algorithm works step by step, and when developers use it in APIs, emails, and web development.
UUID v1 vs v4: Which Should You Use?
Compare UUID v1 and v4 formats with technical details, security implications, and real-world use cases. Includes UUID v7 as a modern alternative.
How to Write Better Regular Expressions: A Practical Guide
Learn regex patterns, performance tips, and common mistakes. Master character classes, quantifiers, and lookaheads with practical examples.
JSON Formatting and Validation: A Developer's Complete Guide
Learn JSON syntax rules from RFC 8259, common validation errors, pretty-printing vs minification trade-offs, and security considerations.
Password Security: How Entropy, Brute-Force Math, and NIST Guidelines Shape Strong Passwords
Understand password entropy, brute-force attack math, NIST SP 800-63B guidelines, and why passphrases outperform complex short passwords.
Unix Timestamps Explained: Epoch, Y2K38, and Timezone Pitfalls
Learn what Unix timestamps are, how the epoch works, the Y2K38 problem, and common timezone pitfalls when working with timestamps in code.
URL Encoding Explained: Percent-Encoding, RFC 3986, and Common Mistakes
Understand how URL percent-encoding works, the difference between encodeURI and encodeURIComponent, and how to avoid double-encoding bugs.
Color Spaces Explained: HEX vs RGB vs HSL and When to Use Each
Understand HEX, RGB, and HSL color formats, CSS color functions, WCAG contrast ratios, and when each format is the right choice.
How Loan Amortization Works: Formulas, Examples, and Strategies
Learn the amortization formula, how interest and principal split over time, and strategies to reduce total interest paid on mortgages and loans.
Lorem Ipsum: Origin, History, and When to Use Placeholder Text
Discover the origin of Lorem Ipsum in Cicero's De Finibus, how it became the design industry standard, and when placeholder text helps or hurts.
How to Calculate Percentages: Formulas, Compound Changes, and Common Mistakes
Master the three core percentage formulas, understand compound percentage changes, and avoid common mistakes in markup, margin, and media reporting.
How to Calculate Exact Age from Date of Birth: Leap Years, Legal Definitions, and Edge Cases
Learn why age calculation is harder than it seems, covering leap years, the February 29 birthday problem, legal age definitions, and ISO 8601 arithmetic.
Metric vs Imperial: A Complete Unit Conversion Guide with History and Formulas
Explore the history of metric and imperial systems, SI base units, temperature conversion formulas, and the kB vs KiB confusion in data storage.
How Password Strength Is Measured: Entropy, Crack Time, and the zxcvbn Algorithm
Understand how password strength is calculated using entropy bits, GPU crack time estimates, pattern-based analysis, and the zxcvbn scoring algorithm.
How Image Compression Works: Formats, Quality, and Performance
Learn how JPEG, WebP, and PNG compression work, what quality settings mean, and how image optimization impacts web performance and Core Web Vitals.
JSON vs YAML: Syntax, Trade-Offs, and the Norway Problem
Compare JSON and YAML for configuration and APIs. Covers syntax differences, implicit typing gotchas, the Norway problem, and when to use each format.
Barcode Formats Explained: EAN-13, Code 128, and More
Learn how barcode formats work, from EAN-13 and UPC-A in retail to Code 128 in logistics. Covers encoding, check digits, and print quality.
URL Slugs and SEO: How to Create Search-Friendly URLs
Learn how URL slugs affect SEO and click-through rates. Covers slug structure, transliteration, common mistakes, and framework-specific best practices.
Browser-Based Tools vs Desktop Software: Privacy, Speed, and Trust
Why browser-based utilities are replacing desktop apps for everyday tasks. Covers client-side processing, the Web Crypto API, offline capability, and what to look for in a trustworthy online tool.
The Developer's Toolkit: 10 Utilities Every Programmer Needs Daily
A practical guide to the everyday utilities developers reach for most: JSON formatters, regex testers, encoders, generators, and more. Includes when to use a GUI tool vs the command line.
JSON vs YAML vs XML vs TOML: Choosing the Right Data Format
A deep comparison of JSON, YAML, XML, and TOML for configuration, APIs, and data exchange. Covers syntax, security, tooling, and real-world adoption with concrete examples.
How Word Counting Works: Reading Time, Character Limits, and Edge Cases
Learn how word counters work, why reading time estimates use 238 WPM, and the character limits that matter for SEO, social media, and publishing.
CSS Gradients: Angles, Color Stops, and Interpolation Explained
Master CSS linear, radial, and conic gradients. Understand angle conventions, color stop syntax, oklch interpolation, and performance best practices.
How Timezones Work: UTC, IANA, and DST Explained
Understand UTC offsets, the IANA timezone database, daylight saving time rules, and common conversion mistakes developers make.
CSS Box-Shadow: Syntax, Layering, and Performance
Learn the CSS box-shadow syntax, how to layer multiple shadows for realistic depth, inset shadow techniques, and rendering performance tips.
Number Base Conversion: Binary, Hex, Octal, and Decimal
Learn how binary, hexadecimal, octal, and decimal conversions work. Covers positional notation, grouping shortcuts, and common pitfalls.
How to Optimize SVG Files: Metadata, Minification, and Size
Learn what makes SVG files bloated, which optimizations are safe, and how stripping metadata and minifying whitespace reduces file size.
CommonMark vs GFM: Markdown Flavors and Why They Render Differently
Understand Markdown flavors, CommonMark's baseline, GitHub-Flavored extensions, common parsing pitfalls, and when to sanitize rendered HTML.
CSV Parsing Done Right: RFC 4180, Edge Cases, and Why Split-on-Comma Fails
Learn what RFC 4180 actually specifies, the CSV edge cases that break naive parsers, delimiter and encoding pitfalls, and when to use JSON instead.