Developer guides
The formats, edge cases and gotchas behind the tools — Base64, timestamps, JSON escaping and getting data out of API responses.
Browser-Based Developer Tools: Why Client-Side Beats Uploading
Why client-side developer tools are usually the right default, what actually happens to data you paste into an online utility, and how to tell the two kinds apart before you paste anything sensitive.
From Copy as cURL to Production Code, Without the Copied Secrets
Turning a Copy as cURL command from DevTools into clean client code — how each flag maps onto fetch, Axios, requests, httpx and net/http, and how to avoid committing the credentials that came along for the ride.
Debugging JWTs Client-Side: Header, Claims, Expiry and Privacy
What is actually inside a JSON Web Token, why pasting a live one into an online decoder hands over a working credential, and how to read the claims that explain most authentication failures.
Extracting and Cleaning URLs from Large API Responses, Safely
Pulling every link out of a large REST, GraphQL or Postman response without pasting proprietary data into a server-side parser — including the escaping, filtering and edge cases that make the job fiddly.
Base64 Encoding Explained (and the Mistake Everyone Makes)
What Base64 actually does, why it makes data roughly a third larger, the difference between standard and URL-safe alphabets, and the one mistake that causes most Base64 bugs in production.
Unix Timestamps: Seconds, Milliseconds and the 2038 Problem
How Unix time works, how to tell seconds from milliseconds at a glance, why leap seconds make it not-quite-elapsed-time, and what the year 2038 problem actually breaks.
How to Extract All URLs from an API Response
A no-code workflow to extract every image, video and link URL from REST, GraphQL, Postman and Insomnia responses, then filter, dedupe and export the list without writing a throwaway script.
Why JSON URLs Contain Backslashes (and How to Fix Them)
Learn why URLs in JSON and API responses show up as https:\/\/example.com, why the escaping is valid rather than a bug, and how to unescape them instantly without writing a regex.