PRACTICAL
GUIDES.
9 guides on tools, code, and workflow. No filler, no padding.
How to Create a robots.txt for Next.js (App Router and Pages Router)
Create a robots.txt for Next.js using the App Router robots.ts file or the Pages Router public folder. Includes common directives, what not to block, and testing steps.
How to Convert JSON to CSV (Online, Python, and More)
Convert JSON to CSV for Excel, Google Sheets, or data pipelines. Covers online tools, Python code, nested JSON handling, and common conversion issues.
How to Validate Email Addresses Online (Format, Syntax, and More)
Email validation explained: what makes an address valid, why regex isn't enough, and how to check email addresses quickly online for free.
How to Convert HEIC to JPG (Free, Fast, No App Needed)
HEIC files from your iPhone won't open on Windows or Android. Here's how to convert HEIC to JPG online for free — and why Apple uses HEIC in the first place.
What Is a JWT Token and How Do You Decode It?
JWT explained: what the three parts mean, how to decode one without a library, what each claim does, and the security gotchas developers miss.
How to Write a GitHub README (With Examples)
A practical guide to writing a GitHub README — structure, GFM syntax, badges, and how to preview it before committing. With real examples for open source and private repos.
Cron Expression Examples: Cheat Sheet with 20+ Real Schedules
20+ cron expression examples covering every common schedule — every minute, hourly, daily, weekly, monthly, weekdays only, and more. Includes @shorthand strings and timezone notes.