Blog
Tips, tutorials, and best practices for modern developers.
Responsive Tester: Preview Your Site on Every Screen Size Without Leaving Your Browser
Test any URL across phone, tablet, laptop, and desktop viewports — spot layout breaks before your users do.
Response Formatter: Pretty-Print and Analyze Any API Response
Turn raw JSON, XML, or HTML API responses into readable, syntax-highlighted output with folding.
Regular Expressions Cheat Sheet for Beginners
A beginner-friendly cheat sheet covering the most useful regex patterns, quantifiers, character classes, and lookaheads — with practical examples.
Redis Command Builder: Master Cache, Queue, and Session Operations
Construct Redis commands for strings, hashes, lists, sets, and sorted sets — with TTL and pipeline examples.
Read Stack Traces Like a Pro: Find Bugs in Seconds, Not Hours
Parse and format stack traces from JavaScript, Python, Java, and more. Identify the error source, call chain, and relevant code locations instantly.
Rate Limit Calculator: Plan API Quotas That Balance Performance and Cost
Calculate requests-per-second, daily quotas, and burst limits — then generate rate-limiting middleware config.
QR Code Generator: From URLs to WiFi Sharing — A Complete Guide
Generate QR codes for URLs, text, WiFi credentials, vCards, and more. Customize size, color, and error correction for any use case.
Python Code Formatting: PEP 8 Compliance Made Effortless
Format Python code to PEP 8 standards with consistent indentation, spacing, and line length. Compatible with Black and autopep8 conventions.
PX to REM Conversion: Build Truly Responsive Web Layouts
Convert pixel values to rem units for scalable, accessible typography and spacing. Understand the relationship between px, rem, em, and viewport units.
Punycode Explained: How International Domain Names Actually Work
Convert international domain names to Punycode and back. Understand IDN, detect homograph attacks, and work with non-ASCII domains.
Postman to cURL: Export Your Collections as Terminal-Ready Commands
Convert Postman collection JSON exports into clean cURL commands for scripting, CI/CD, and documentation.
Placeholder Image Generator: Create Mockup Images for UI Prototyping
Generate placeholder images of any size, color, and text — for wireframes, prototypes, and development.