Blog
Tips, tutorials, and best practices for modern developers.
Schema Designer: Define Data Models Visually for SQL, NoSQL, and APIs
Design database schemas with a drag-and-drop interface — export as SQL, Prisma, TypeORM, or JSON Schema.
ROT13 Cipher: The Classic Text Obfuscation Method Explained
Apply ROT13 substitution cipher to obfuscate text. Learn its history, how it works, and why it's still used for spoiler tags and puzzles.
robots.txt: Control How Search Engines Crawl Your Website
Generate robots.txt files to control search engine crawling. Allow or block specific pages, set crawl rates, and point to your sitemap.
REST API Builder: Design, Test, and Debug Endpoints Without Postman
Construct HTTP requests visually, set headers and body payloads, inspect responses — all in one browser tab.
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.