Guides,
Tutorials & Deep Dives.
Practical articles on developer tooling, authentication, API design, and everything in between. Written by developers, for developers.
The Complete Guide to DevWallah Local Server
Learn how to spin up a stateful in-browser mock server with CRUD routes, a real SQL-queryable database, service worker interception, and the built-in API client — all without any backend.
Mastering the DevWallah API Client
A deep dive into the browser-based API client — environment variables, authentication flows, pre-request scripts, testing assertions, and instant code generation.
Mock API vs Local Server: Which Should You Use?
A practical comparison of the DevWallah Mock API and Local Server tools — when to reach for each one, their differences in complexity, and how to combine them in your workflow.
Understanding JWT Tokens: A Developer's Guide
Demystify JSON Web Tokens — structure, encoding, signature verification, common security pitfalls, and how to decode and inspect them with the DevWallah JWT Decoder.
Regex Demystified: A Practical Guide with DevWallah Regex Tester
Learn how regular expressions work from the ground up — character classes, quantifiers, groups, lookaheads — and test every concept live in the DevWallah Regex Tester.