Developer Comparisons
Deep, opinionated guides for the small choices developers make weekly — which UUID version, which JWT algorithm, which hash function, which redirect status. TL;DR tables up top, decision trees at the bottom, no filler.
UUID v4 vs UUID v7: Which One Should You Use as a Primary Key?
UUID v4 is fully random; UUID v7 is time-ordered. This guide explains when each is the right choice — especially for database primary keys, distributed IDs, and analytics keys.
JWT Algorithms: HS256 vs RS256 vs ES256
HS256 is symmetric (shared secret), RS256 and ES256 are asymmetric (public/private keypair). This guide explains when each JWT signing algorithm is the right choice.
MD5 vs SHA-256 vs bcrypt: When to Use Which Hash
MD5 and SHA-256 are fast hashes for fingerprints; bcrypt is a deliberately slow hash for passwords. Using the wrong one is a top security bug — this guide explains when each fits.
HTTP 301 vs 302 vs 307 vs 308: Which Redirect Should You Use?
301 and 308 are permanent; 302 and 307 are temporary. 301 and 302 may change methods; 307 and 308 preserve them. This guide picks the right redirect for every scenario.
camelCase vs snake_case vs kebab-case: When to Use Each Naming Convention
camelCase for JavaScript variables, snake_case for Python and databases, kebab-case for URLs and CSS. This guide gives concrete rules and the historical reasons behind each.
XML vs JSON / JSON vs XML: When to Use Each Data Format in 2026
JSON has become the default data interchange format on the web, but XML is far from dead — SOAP, RSS, XHTML, XSLT, and countless enterprise systems still speak XML natively. This guide covers structure, verbosity, tooling, schema, and where each format still wins.
JSONPath vs jq: Which JSON Query Tool Should You Use?
JSONPath is a compact, XPath-inspired notation for extracting nodes from JSON. jq is a full functional programming language for JSON. This guide covers when each is the right tool.
JSON vs YAML: Which Format Should You Use for Config, APIs, and DevOps?
JSON is the standard for APIs and data interchange; YAML dominates configuration and DevOps. This guide compares readability, comment support, syntax strictness, and ecosystem tooling.
RSA vs ECDSA: Which Asymmetric Cryptography Algorithm Should You Choose?
RSA offers compatibility with every system built before 2020; ECDSA offers smaller keys, faster signing, and better mobile performance. This guide compares key sizes, speed, ecosystem support, and real-world adoption.
Encoding vs Encryption: What's the Difference and Why You Shouldn't Confuse Them
Encoding transforms data into a different representation (Base64, Hex, URL encode). Encryption transforms data into ciphertext (AES, RSA). Never use encoding when you mean encryption — this guide explains why.
SHA-1 vs SHA-256: Why You Should Migrate Off SHA-1 in 2026
SHA-1 is broken for collision resistance and deprecated by TLS, Git, and every major browser. SHA-256 is the modern standard. This guide explains the security gap and how to migrate.
REST vs GraphQL in 2026: Which API Pattern Should You Choose?
REST is proven, cacheable, and tooling-rich. GraphQL gives clients exact-fetch and a single endpoint. This guide helps you pick the right pattern for your next API.
Base64 vs Hex: When to Use Each Encoding for Binary Data
Base64 and Hex both encode binary data as text, but they differ in compactness, readability, and ecosystem support. Base64 is ~33% smaller but harder to read; Hex is double the size but human-debuggable. This guide picks the right one for every use case.
WebP vs AVIF: Which Next-Gen Image Format Should You Use in 2026?
WebP and AVIF both replace JPG and PNG with dramatically smaller file sizes. WebP has universal browser support; AVIF is 20-30% smaller but only supported in modern browsers. This guide picks the right format for every deployment.
SVG vs PNG: When to Use Vector vs Raster Images for Web, Icons, and Logos
SVG is resolution-independent and code-editable; PNG is pixel-perfect and universally supported. This guide picks the right format for icons, logos, screenshots, and illustrations.
JPG vs PNG: When to Use Lossy vs Lossless Images for Web, Screenshots, and Photography
JPG is lossy and optimised for photos; PNG is lossless and optimised for graphics with transparency. This guide explains when each is the right choice — with file-size comparisons, quality tradeoffs, and real-world recommendations.