DevBench Blog
Practical guides on the tools every developer uses daily — written to be bookmarked, not just skimmed.
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Morse Code Alphabet: Complete A–Z Chart, Numbers & How to Use It
A complete Morse code reference: every letter, digit, and common punctuation mark, plus a brief history and where Morse is still used today.
Pythagorean Theorem: Formula, Worked Examples & Calculator
a² + b² = c² explained from scratch: finding the hypotenuse, solving for a missing leg, Pythagorean triples, and real-world applications with step-by-step worked examples.
How to Generate Secure Passwords: A Developer's Guide
What makes a password truly secure — entropy, character sets, length — and how to generate cryptographically strong passwords in JavaScript, Python, and on the command line.
SHA-256 vs MD5: Which Hash Function Should You Use?
MD5 is fast and broken; SHA-256 is the modern baseline. A practical breakdown of hash functions, collision resistance, and when to reach for bcrypt or Argon2 instead.
Cron Expression Syntax: A Complete Guide with Examples
Master cron expression syntax from the five standard fields through extended six-field formats, special strings, and common scheduling patterns with copy-ready examples.
Unix Timestamps Explained for Developers
Unix timestamps are the lingua franca of time in software — what they are, how to work with them in JavaScript and Python, common pitfalls around timezones and milliseconds, and the 2038 problem.
HEX, RGB, HSL: CSS Color Formats Explained
HEX, RGB, HSL, and modern CSS color formats each have a job: copy from design tools, manipulate programmatically, or communicate intent. Here is when to use each and how to convert between them.
Browser code playgrounds: what runs where (and what never leaves your tab)
Online playgrounds mix iframes, WebAssembly, and remote compilers. Here is a practical map of which pieces stay local, which hit a third-party API, and how to choose a flow for secrets and stdin-heavy programs.
How Base64 encoding works — and when NOT to use it
Base64 turns binary into printable ASCII — useful for email, JSON, and data URIs. Here is how the encoding actually works, why it inflates size by ~33%, and the dangerous cases where people mistake it for encryption.
JWT security best practices — 10 things developers get wrong
JWTs are convenient, but misuse is everywhere: treating payloads as secret, skipping audience checks, weak HMAC keys, and storing tokens where XSS can read them. Here are ten concrete mistakes and what to do instead.
YAML vs JSON — key differences with real examples
JSON is strict and universal; YAML is human-friendly and dangerously powerful. Compare syntax, types, anchors, comments, and multi-document streams — with copy-paste examples you can run through a formatter.
How to Validate JSON Online (Safely)
Validate JSON before it breaks production APIs — what “valid JSON” means, how browser-only tools differ from server uploads, and a simple workflow you can repeat every time.
JWT Decoder Without Uploading to a Server
Decode JWT header and payload in the browser: why Base64 is not encryption, what stays local vs what never leaves your machine, and why decoding still isn’t verification.
UUID vs ULID vs Nano ID: Which Should You Use?
UUID v4 is everywhere, but ULID and Nano ID solve real problems UUID can't. Here's a practical breakdown of when to use each.
JWT Explained: Header, Payload, and Signature Decoded
What actually goes inside a JSON Web Token? We break down every part of a JWT, explain the signature algorithm, and show the common pitfalls.
URL Encoding: encodeURIComponent vs encodeURI Explained
JavaScript has two URL encoding functions and most developers mix them up. Here's exactly when to use each one — and what breaks when you don't.
What Makes JSON Invalid? The 7 Most Common JSON Syntax Errors
Trailing commas, single quotes, comments — these valid JavaScript patterns silently break JSON parsers. Learn to spot and fix all of them.
Regular Expressions Cheat Sheet for JavaScript Developers
The 20 regex patterns every JavaScript developer actually uses — email, URL, IP address, date, and more — with copy-ready code.