12 guides on tools, code, and workflow. No filler, no padding.

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.
Convert JSON to CSV for Excel, Google Sheets, or data pipelines. Covers online tools, Python code, nested JSON handling, and common conversion issues.
Email validation explained: what makes an address valid, why regex isn't enough, and how to check email addresses quickly online for free.
Remove image backgrounds in seconds using free AI-powered tools. No Photoshop, no manual selection. Works for product photos, profile pictures, and thumbnails.
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.
JWT explained: what the three parts mean, how to decode one without a library, what each claim does, and the security gotchas developers miss.
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.