Developer Tools — Guides & Articles

• How to Generate a MAC Address for Test Data and Fixtures

  Published 2026-09-09

  Generate 1–20 cryptographically random, locally administered unicast 48-bit MAC addresses in your browser for labs, fixtures, VMs, and docs — no vendor OUI…

  

• Linux Command List: 13 Safe GNU Coreutils Templates

  Published 2026-09-09

  Search a vetted Linux command list of thirteen GNU Coreutils templates by task, copy a safe placeholder, and review guardrails before running.

  

• How to Use a JavaScript Key Code Finder

  Published 2026-09-09

  Use a JavaScript Key Code Finder to inspect KeyboardEvent fields including key, code, location, modifiers, repeat, and the legacy keyCode in your browser.

  

• Generate a JWT Token in Postman with HS256 Locally

  Published 2026-09-09

  Generate a JWT token in Postman by building an HS256 string with the JWT Generator, pasting it into the Authorization tab, and verifying it.

  

• Decode a JWT Token in C# Without a NuGet Library

  Published 2026-09-09

  Decode a JWT token in C# using the standard library, manual Base64url, and a local browser helper — with concrete code and safety notes.

  

• How to Validate a JSON File in Your Browser

  Published 2026-09-08

  Paste a JSON file to get a valid or invalid verdict with exact line and column for syntax errors, plus depth and key-count diagnostics. Runs locally.

  

• Does the JSON to Zod Converter Install or Run Zod?

  Published 2026-09-08

  The JSON to Zod Schema Converter emits source text only — it does not install or run Zod. Here is what it does locally, what your project needs, and where…

  

• Is JSON to XML Safe to Use Online? A Browser-Side Guide

  Published 2026-09-08

  Browser-side JSON to XML converters never upload your data. See what makes a tool safe, how type attributes preserve value types, and what to verify.

  

• Will the Output Compile Without Dependencies: JSON to Rust

  Published 2026-09-08

  No, the JSON to Rust Struct Converter output does not compile alone. Learn what source the tool emits and which crates your project needs.

  

• Convert JSON to HTML Table in JavaScript Safely

  Published 2026-09-07

  Turn strict JSON objects into escaped HTML table markup in your browser. No innerHTML, no uploads, deterministic union columns and a safe React text preview.