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Developer Articles - Page 2

Hands-on articles on developer tools, implementation notes, technical deep dives, and everyday debugging and data conversion workflows. (page 2)

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JWT Security Deep Dive: Attack Vectors, JWKS, and Production Best Practices

A thorough guide to JWT security — covering the alg:none attack, algorithm confusion, key management with JWKS, token revocation strategies, and a production-ready security checklist.

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Generating and Reading QR Codes: How They Work and How to Use Them

Explore the basics of QR codes, secure methods for generating and reading them, and practical use cases in development.

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Practical Regex Recipes: Copy-Paste Search and Replace Patterns

Ready-to-use regular expressions for emails, URLs, dates, whitespace cleanup, and more—each with what it matches—plus everyday text-processing tips.

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URL Mechanics and Parameter Analysis: From Encoding to JSON Conversion

Explore the structure of URLs, the necessity of Percent-Encoding, and efficient ways to handle complex query parameters in web development.

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Chmod Calculator: Visually Calculate and Verify Linux Permissions

A visual tool to manage and verify permission settings like chmod 755 or rwxr-xr-x effortlessly.

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cURL Converter: Instantly Transform cURL into Your Favorite Programming Language

Convert cURL commands into Python, JavaScript, Go, Rust and more. Covers why shell parsing (not regex) is required to convert curl reliably, the supported languages, and what to check before shipping the generated code.

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Generate a Full Set of Favicons from a Single Image—Right in Your Browser

Introducing a tool that lets you batch-generate favicon.ico, Apple Touch Icons, and PNGs of various resolutions entirely within your browser.

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SQL Formatter: Making Queries Readable, and Why Dialect Selection Matters

Format messy SQL pulled from logs or ORMs into readable queries. Covers the technical reasons dialect selection (PostgreSQL/MySQL/BigQuery) changes formatting output, and why formatting doubles as a syntax check.

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Drastically Simplify Markdown Table Creation! Visual Editor Techniques

'Writing tables in Markdown is such a chore...' If you've ever felt that, this guide is for you. Learn how to increase document efficiency using a visual editor for intuitive table creation and editing.

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Mastering Cron Expressions: The 5 Fields and Special Characters with Examples

Understand Cron's 5 fields, special characters (* , - / ? L W #), common scheduling examples, and the UTC/timezone pitfalls—all explained with real expressions.

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Base64, Base58, and Base32 Explained: When and How to Use Each Encoding

Understand how Base64 encoding works at the bit level, why it increases data size by 33%, the differences between Base64, Base64Url, Base58, and Base32, and practical use cases for each.

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Visualizing GitHub Actions Workflows: Understanding Complex Pipelines

Visualize GitHub Actions job dependencies (needs) as a Mermaid graph. Covers how the needs field converts to arrows, the string-vs-array quirk, fan-out/fan-in/matrix patterns, and how to spot circular dependencies.

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Hashing, Salt, and HMAC: A Developer's Guide to Secure Data Handling

Learn how SHA-256, bcrypt, and Argon2 work, why salting passwords is non-negotiable, when to use HMAC vs. plain hashing, and practical implementation patterns in JavaScript, Python, and Go.

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How to Read Text Diffs: Understanding Line-Level and Word-Level Comparison

Learn how to read diffs: the meaning of + and -, line vs. word-level comparison, handling whitespace and line endings, and practical uses in code review.

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UUID Complete Guide: Versions, Use Cases, and Choosing Between v4 and v7

Understand UUID versions v1 through v7, how to generate them in JavaScript, Python, and Go, and why UUID v7 is quickly becoming the preferred choice for database primary keys.

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Regular Expressions for Engineers: Metacharacters, Groups, Lookaheads, and ReDoS

A complete practical guide to regex — from basic metacharacters to named capture groups, lookaheads, non-greedy quantifiers, and how to avoid catastrophic backtracking (ReDoS).

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Unix Time and Timezones: A Practical Engineering Reference

Master Unix timestamps — what they are, the seconds vs milliseconds trap, timezone handling in JavaScript, Python, Go, and SQL, the 2038 problem, and how to convert them reliably.

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Generate an OpenAPI Schema from JSON | Swagger-Compatible

How JSON gets turned into an OpenAPI 3.1 components schema. Covers the type-inference rules, how mixed-type arrays become oneOf, automatic date-string detection, and what to double-check after generating.

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How to Generate TypeScript Types from JSON: A Hands-On Guide with Examples

Turn API-response JSON into type-safe TypeScript interfaces. Real conversion examples covering null, arrays, nesting, naming tips, and when to hand-edit.

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JSON to Zod Schema: Generate Runtime Validation from Sample JSON

Turn a sample JSON payload into a Zod schema and get TypeScript types for free. Covers how types are inferred, how optional and nullable fields are detected, where generated schemas need hand-tuning, and how Zod differs from plain type assertions.

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JSON vs. YAML: Choosing the Right Format and How to Convert

JSON and YAML are ubiquitous in development. Compare their features and use cases, see a real conversion example, and learn when to convert between them.

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What is JWKS (JSON Web Key Set)?

How JWKS works, what each field in the JSON means, how it's used during JWT signature verification, and what to watch for during key rotation. Generate an RSA key pair and see both JWKS and PEM formats in your browser.

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Understanding JWT (JSON Web Token): Structure, Claims, and Secure Debugging

A comprehensive guide to JWT — how the Header, Payload, and Signature work, which claims matter most, common security pitfalls, and how to safely decode tokens in your browser.