Requestly: A Free, Open-Source Postman Alternative for Debugging and Mocking

Discovering Requestly A Game-Changer for Browser-Level Debugging As developers, we often use tools like Postman for API testing but what about those moments when we need to inspect or manipulate live network requests happening right inside the browser? That’s when I came across something brilliant: Requestly What is Requestly? Requestly is a powerful browser extension + desktop app that lets you: Intercept and view live network requests directly from Chrome, Edge, or Firefox Modify, redirect, or mock HTTP/HTTPS requests and responses in real time Map remote APIs to local files perfect for testing frontend changes without touching the backend Create custom rules for header modification, URL rewrites, delays, or even simulate API failures Capture and generate cURL commands instantly for debugging or documentation Why it matters In full-stack development, there’s often a disconnect between the frontend and backend especially during testing and integration phases. Requestly bridges that gap perfectly. It’s like having a Postman inside your browser, letting you see and control exactly what’s happening in your network tab. Where it really shines: Frontend devs can mock APIs and keep building even if the backend isn’t ready QA teams can simulate edge cases and failure responses effortlessly Full-stack developers can debug CORS, headers, and payloads without extra setup Great for inspecting third-party API calls or debugging production issues Since I started using it, I’ve noticed how smoothly it fits into my daily workflow no context switching, no waiting on backend fixes, just real-time control and visibility. If you haven’t tried it yet, it’s definitely worth exploring 🔗 https://requestly.com Have you used Requestly or a similar debugging tool before? Would love to hear how it fits into your workflow! #WebDevelopment #Angular #NodeJS #NestJS #MEANStack #FullStackDeveloper #DebuggingTools #FrontendDevelopment #BackendDevelopment #WebPerformance #APIIntegration #BrowserTools #DeveloperProductivity #SoftwareEngineering #AWS #Azure #DevTools #LearningEveryday #TechCommunity #PostmanAlternative #Requestly

Requestly: Transforming Web Development Debugging 🚀 Excited to share about Requestly - a game-changing tool that's making developers' lives so much easier! What is Requestly? Requestly is a powerful browser extension and development tool that allows developers to: ✅ Intercept and modify HTTP requests/responses ✅ Mock APIs without touching backend code ✅ Test different scenarios instantly ✅ Debug production issues faster ✅ Redirect URLs and inject custom scripts Why it matters: Instead of waiting for backend changes or setting up complex mock servers, developers can test and debug right in their browser. It's like having a Swiss Army knife for web development - saving hours of development time. Whether you're a frontend developer, QA engineer, or full-stack developer, Requestly is worth checking out. It's one of those tools that once you start using, you wonder how you ever worked without it. #WebDevelopment #DevTools #BrowserStack #Requestly #SoftwareDevelopment #DeveloperTools

🔰 Self-Hosting Web Apps : Code Structure & Environment Variables 🧩 Scenario Your app runs perfectly in development — but once deployed, it suddenly fails to connect to APIs or databases. The culprit? Mismanaged environment variables. ⚙️ Definition Environment Variables are secret keys and configuration values that define how your app runs across environments — local, staging, and production. They prevent exposing sensitive data like API keys or credentials in the codebase. 💡 Real-Time Example In the Audio Transcription App, the Gemini API Key is required to transcribe audio files. Instead of hardcoding it in your code, you store it in: - Local: ".env.local" (for development) - Coolify: Environment Variables section (for production) 🧱 Code Example (Local .env.local) # Local file for dev only GEMINI_API_KEY="AIzaSy...local_key...hK58v" NODE_ENV=development 🔐 Coolify Panel Configuration (Production) In Coolify Dashboard → App → Environment Variables: - Variable: "GEMINI_API_KEY" - Value: your_live_key_here - Scope: Production 🧠 QA Insight Always test with one invalid key in QA — this helps confirm error handling and ensures your app responds gracefully to missing or invalid configurations. 💡 Shortcut “ENV = Secrets + Settings = Stability.” 🧩 Tips & Tricks ✅ Use ".env.example" file (without real values) to document required variables for new teammates. ✅ Keep local ".env" files in ".gitignore". ❌ Never paste real API keys into GitHub commits. 📘 Memory Trick Remember “3Es”: Environment, Encryption, Exclusion — define, secure, exclude. 🎯 Conclusion Environment variables are the backbone of reliable deployments — managing them correctly in Coolify ensures your app remains secure, scalable, and stable across all environments. 💬 Interview Tip If asked: “How do you handle environment variables securely in deployments?” Answer: “I use Coolify’s environment variable manager to configure and protect API keys, keeping them out of the Git repo and validating them during QA redeployments.” #Coolify #EnvironmentVariables #QAEngineering #WebHosting #VPS #DevOpsForQA #AutomationTesting #SecurityBestPractices #JavaSelenium #AppiumTesting #TestingCommunity #SelfHosting

Why I’m Moving from Postman to Requestly for API Testing For a long time, Postman was my default tool for testing and debugging APIs. It’s reliable and full of features but over time, I realized I needed something lighter and faster that fits better into my daily development flow. That’s when I started using Requestly. It’s not just another API client. it lets you intercept, mock, and modify HTTP requests right from your browser or desktop. I can test front-end features before the backend is even ready, redirect endpoints on the fly, and debug without switching tabs or setting up complex proxies. For frontend or full-stack developers who juggle multiple environments, Requestly feels like a game-changer. It’s quick, collaborative, and removes a lot of friction from local development. If you’ve been using Postman for a while, it’s worth giving Requestly a try - you might be surprised how much simpler your workflow becomes. #Requestly #APITesting #WebDevelopment #Developers #PostmanAlternative #SoftwareDevelopment #Debugging #Frontend #FullStack

“IT WORKS ON POSTMAN”.. “CHECK AGAIN IT WORKS ON LOCALHOST” Very familiar phrase init… but completely breaks on the frontend. At this point, frontend devs deserve national awards for patience 😂. Dear backend engineers, if your API only works in Postman, it doesn’t work. Postman ignores CORS, wrong headers, bad body formats browsers don’t. Stop stressing us abeg😩 Real world users are not testing your endpoints on Postman. They’re hitting it from the main app. A solid backend should: Handle CORS properly Return consistent response formats Validate data without breaking flows Work smoothly across frontend, mobile, and web clients Let’s do better. Quality engineering is teamwork …not “it worked on my machine.”

Building something that feels simple for users often means solving complex problems behind the scenes. What started as a basic task manager quickly turned into a deep dive into real-time systems, scalability, and cross-browser behavior. I built a collaborative task manager that syncs in real time, works offline, sends smart reminders, and visualizes productivity data, but getting it there took several rounds of problem-solving and iteration. 🔘The Challenges 💨Real-Time Synchronization: Socket.IO connections occasionally dropped, updates collided between users, and offline edits caused data inconsistencies. 💨Push Notifications and PWA Support: Different browsers handled service workers inconsistently. Making push notifications behave across Chrome, Edge, Firefox, and iOS Safari was one of the toughest hurdles. 💨Performance Issues: Offline queue management, redundant API calls, and state updates initially slowed down the experience. 🔘The Solutions 💨Systematic Debugging: I implemented targeted logging and isolated async flows to trace socket events and fix race conditions. 💨Architecture Refinements: Introduced offline sync queues, improved error handling, and caching layers for smoother reconnections. 💨Cross-Browser Compatibility: Added fallback mechanisms for browsers with limited push notification support, ensuring consistent functionality. 💨Testing and Iteration: Combined Jest unit tests with hands-on user testing to fine-tune edge cases and improve responsiveness. Tech Stack React (Hooks, Context) | Node.js + Express | MongoDB | Socket.IO | Tailwind CSS | PWA APIs Every debugging session uncovered a new lesson, not just about code, but about how users perceive reliability. If you’ve worked on real-time collaboration apps or have insights on improving sync architecture, I’d love to exchange ideas. Live Demo: https://lnkd.in/gEe39Kkc GitHub: https://lnkd.in/gYk62-nn #WebDevelopment #FullStackDeveloper #ReactJS #NodeJS #PWA #SoftwareEngineering #Debugging

🎉Backend Journey - Day 7 👨💻What I learned Till Now - How to make a registerUser controller to register the User - How to take data, validate data, check in DB if already exist, SAVED the new user ( with generating Access Token, Refresh Token and General Tokens ), User verification via email, sending response back ) for registering the User. - How to test using postman 🧑🏫Instructor:- Hitesh Sir (Chai aur Code) Please send also your advice, experience, tips and thoughts for Backend. #web #codingjournery #backend #webdev #webdevelopment #frontend #fullstackdev #dev #developer #learninpublic

🚀 How Automated Tests Saved My Node.js Deploy Last week, I refactored a small authentication function, or so I thought. Five minutes later, half the API started returning 401 😅 Luckily, I had already adopted automated testing in my workflow. One quick npm test and the failing cases popped right up, before going to production. That run literally saved me hours of debugging and a sleepless night. 🧩 My testing stack: . Jest – main testing framework . Supertest – HTTP endpoint testing . Sinon – mocks and spies for isolated logic . GitHub Actions – runs tests automatically on every PR 💡 Tip: You don’t need 100% coverage, you need confidence where it matters most. ⚙️ Quick example import request from 'supertest'; import app from '../src/app.js'; describe('User API', () => {  it('should create a new user', async () => {   const res = await request(app)    .post('/users')    .send({ name: 'Jhony', email: 'jhony@test.com' });   expect(res.statusCode).toBe(201);   expect(res.body).toHaveProperty('id');  }); }); Since I added automated tests, every PR comes with fewer surprises and more confidence. Now my CI runs, tests pass ✅, and deployments are way less stressful. #NodeJS #Testing #Jest #Automation #CleanCode #Backend #JavaScript #SoftwareEngineering #DevLife #MakersGonnaMake

Hey developers 👋 If you’re into web development, you probably write tons of code — but how often do you actually test it? In this video, I’ve explained 👇 ✅ Why testing is not optional for developers ✅ Different types of software testing (unit, integration, system, acceptance) ✅ How testing saves you from production nightmares 😅 ✅ How to start testing as a web developer — the simple way Whether you build APIs, frontend apps, or full-stack systems, this video will help you understand testing like a developer, not like a tester. 🎥 Watch Playlist here → https://lnkd.in/emZ6XfVv 💬 Let me know in the comments what testing tool you use most! #WebDevelopment #SoftwareTesting #JavaScript #NodeJS #TestingForDevelopers #CleanCode #FullStackDevelopment #DevTips #TestingMindset #DevelopersJourney

Know this before you DEPLOY 1️⃣𝗡𝗲𝘃𝗲𝗿 𝗶𝗴𝗻𝗼𝗿𝗲 𝘄𝗵𝗮𝘁 𝗿𝗲𝘁𝘂𝗿𝗻𝘀 𝗮 𝗣𝗿𝗼𝗺𝗶𝘀𝗲.   Async functions dont execute like sync ones, they schedule, not complete. 2️⃣𝗨𝘀𝗲 𝘗𝘳𝘰𝘮𝘪𝘴𝘦.𝘢𝘭𝘭() 𝘄𝗶𝘀𝗲𝗹𝘆. 𝘢𝘸𝘢𝘪𝘵 𝘗𝘳𝘰𝘮𝘪𝘴𝘦.𝘢𝘭𝘭(𝘶𝘴𝘦𝘳𝘴.𝘮𝘢𝘱((𝘶) => 𝘴𝘦𝘯𝘥𝘞𝘦𝘭𝘤𝘰𝘮𝘦𝘌𝘮𝘢𝘪𝘭(𝘶))); 𝘭𝘰𝘨𝘔𝘦𝘴𝘴𝘢𝘨𝘦("𝘈𝘭𝘭 𝘦𝘮𝘢𝘪𝘭𝘴 𝘴𝘦𝘯𝘵!");   You will ensure every task completes, or catch the failure early. 3️⃣𝗜𝗳 𝘀𝗼𝗺𝗲 𝗰𝗮𝗻 𝗳𝗮𝗶𝗹 𝘀𝗶𝗹𝗲𝗻𝘁𝗹𝘆, 𝘂𝘀𝗲 𝘗𝘳𝘰𝘮𝘪𝘴𝘦.𝘢𝘭𝘭𝘚𝘦𝘵𝘵𝘭𝘦𝘥() 𝘤𝘰𝘯𝘴𝘵 𝘳𝘦𝘴𝘶𝘭𝘵𝘴 = 𝘢𝘸𝘢𝘪𝘵 𝘗𝘳𝘰𝘮𝘪𝘴𝘦.𝘢𝘭𝘭𝘚𝘦𝘵𝘵𝘭𝘦𝘥(𝘶𝘴𝘦𝘳𝘴.𝘮𝘢𝘱(𝘴𝘦𝘯𝘥𝘞𝘦𝘭𝘤𝘰𝘮𝘦𝘌𝘮𝘢𝘪𝘭));   𝘳𝘦𝘴𝘶𝘭𝘵𝘴.𝘧𝘰𝘳𝘌𝘢𝘤𝘩((𝘳) => {    𝘪𝘧 (𝘳.𝘴𝘵𝘢𝘵𝘶𝘴 === "𝘳𝘦𝘫𝘦𝘤𝘵𝘦𝘥") 𝘤𝘰𝘯𝘴𝘰𝘭𝘦.𝘦𝘳𝘳𝘰𝘳(𝘳.𝘳𝘦𝘢𝘴𝘰𝘯);   }); 4️⃣𝗔𝗹𝘄𝗮𝘆𝘀 𝘄𝗿𝗮𝗽 𝗰𝗿𝗶𝘁𝗶𝗰𝗮𝗹 𝗮𝘀𝘆𝗻𝗰 𝗰𝗮𝗹𝗹𝘀 𝗶𝗻 𝗲𝗿𝗿𝗼𝗿 𝗯𝗼𝘂𝗻𝗱𝗮𝗿𝗶𝗲𝘀 𝗼𝗿 𝘁𝗿𝘆 𝗼𝗿 𝗰𝗮𝘁𝗰𝗵.   Uncaught promise rejections can kill servers quietly. 5️⃣In React or frontend apps, a missing await can trigger re renders or memory leaks when states update before data arrives. One missing 𝘢𝘸𝘢𝘪𝘵 can look harmless, but in production, it means broken workflows, lost users, and long days chasing invisible bugs. 𝗕𝗲𝗳𝗼𝗿𝗲 𝘆𝗼𝘂 𝗗𝗘𝗣𝗟𝗢𝗬: ✅ Add ESLint rules 𝘯𝘰-𝘧𝘭𝘰𝘢𝘵𝘪𝘯𝘨-𝘱𝘳𝘰𝘮𝘪𝘴𝘦𝘴 ✅ Use typed APIs that force you to handle Promises ✅ Wrap all async functions in predictable handlers ✅ And above all, never assume async = done. When you build at scale, tiny async mistakes become massive bottlenecks. That’s why companies that value reliability, code discipline, and developer empathy move faster, not just with speed, but with control. If your team struggles with async bugs, data inconsistencies, or untraceable behavior, that is exactly the kind of system I help teams debug, refactor, and scale with full chest. #Nodejs #JavaScript #Async #Promise #Nextjs #WebDevelopment #Backend #Frontend #Startup #CTO #CleanCode #Debugging #SoftwareEngineering