Blog
Tutorials and guides on developer utilities, encoding, timestamps, and security tools.
Base64 Encoding Overhead in 2026: Why 33% Is Costing You
Free, no-signup guide to Base64 size math in 2026. Why encoding costs 33%, when you can skip it, and 3 fast alternatives with real benchmarks.
Cron Expressions in 2026: 7 Patterns That Ship in Prod
Free cron cheat sheet with 7 patterns devs actually ship in 2026. DST traps, timezone gotchas, and when to skip cron for Temporal or K8s jobs.
JWT Token Size Guide: Why Your Auth Header Is 2KB in 2026
Free, no-signup breakdown of JWT size math. Real token sizes (180B to 8KB), CDN header limits, and fixes to get your tokens back under 1KB fast.
Regex Performance in 2026: Benchmarks for 20 Real Patterns
Free regex benchmarks across 20 real patterns. See ReDoS traps, RE2 vs PCRE2 vs V8 speed, and when to skip regex for a parser. Try our tester.
UUID v4 vs v7 in 2026: Why Time-Ordered IDs Are Faster
Free benchmarks of UUID v4 vs v7 on a 10M row Postgres table. Why v7 inserts run 4x faster, when v4 still wins, and how to migrate safely.
Base64 Encoding and Decoding: The Complete Guide
Everything you need to know about Base64 — what it is, when to use it, code examples in every language, and common mistakes to avoid.
Cron Expression Syntax: Visual Guide with 30+ Examples (2026)
Master cron syntax in 5 minutes. The five fields, every operator (* / - ,), 30+ copy-paste patterns for daily/weekly/monthly jobs, and AWS/GCP/GitHub Actions equivalents.
My Bookmarks Bar in 2026: Developer Tools I Actually Use Every Day
The 10 developer tools that survived my bookmarks purge. Fast, privacy-respecting, and actually used daily.
JWT Tokens Explained: How to Decode and Debug Them
A practical guide to understanding JSON Web Tokens — what the three parts are, how to decode them, and security pitfalls to avoid.
Regex Cheat Sheet 2026: The Only Reference You Need
Complete regex reference with character classes, quantifiers, lookaheads, common patterns, and language-specific examples for JavaScript, Python, and Go.
SHA-256 Hash: How It Works, Output Length & Code Examples (JS, Python, CLI)
SHA-256 produces a 64-character hex hash from any input. Learn how it differs from encryption, generate hashes in JavaScript, Python, and the command line, and see real-world use cases.
Unix Epoch Timestamps: Everything You Need to Know
What epoch time is, how to work with it in every language, the seconds vs milliseconds trap, and the Y2038 problem.
Convert Unix Timestamp to Date in JavaScript (And Back)
How to convert between Unix timestamps and JavaScript dates -- seconds vs milliseconds, Intl.DateTimeFormat, timezone handling, and common recipes.
URL Encoding and Decoding: Complete Guide with Examples
Complete guide to URL encoding (percent-encoding) -- encodeURIComponent vs encodeURI, Python urllib, URLSearchParams, character reference table, and common pitfalls.