Developer Tool Guides
Short, practical walkthroughs for common developer data tasks: formatting API responses, decoding tokens, converting values, and preparing payloads for debugging.
How to Format and Validate a JSON API Response
Turn a dense API payload into readable JSON, spot common parse errors, and decide when to minify the result.
Decode HTML Entities Online and in JavaScript
Understand escaped HTML text, decode entities such as amp, lt, quot, and nbsp, and avoid double-decoding mistakes.
Chmod Permissions Converter Guide
Translate between octal and symbolic Linux permissions, learn common chmod values, and avoid risky recursive changes.
Minify CSS and JavaScript Online
What minify means, how a CSS minifier and JavaScript minifier shrink files, and how it differs from gzip, bundling, and obfuscation.
Why these guides exist
Tool pages are best when you already know what to do. Guides are for the moment before that: when you have a copied payload, a suspicious token, or a compact value and need a reliable next step.
Each guide focuses on a real workflow and links directly to the relevant DevTools Box utility so you can try the steps with your own data.