Tutorials, deep-dives, and privacy-first thinking about developer tools.
Showing 1–12 of 26 posts
Lorem Ipsum Markdown that survives the renderer: which blocks to fill, the characters that quietly become syntax, and how filler behaves on import to Notion.
Lorem Ipsum HTML in seconds: Emmet abbreviations, browser generators, the right tag for each block, and the lang trap that makes screen readers stumble.
How to seed a database from a CSV file in Laravel, Django and Rails, when to skip the ORM for COPY or LOAD DATA, and how to keep seeds re-runnable.
A Web Audio API beep needs no audio file. One oscillator, one gain node and five lines of JavaScript give any timer an alarm that never fails to load.
Excel to JSON does not require uploading your spreadsheet anywhere. Here is the browser-only workflow, plus the date and precision traps that corrupt data.
Learn how to compare two JSON files without key-order and whitespace noise. Normalize first, sort keys with jq, and diff only the changes that matter.
A practical guide to regex find and replace in VS Code: capture groups, $1 substitution, case modifiers, and the side-by-side diff preview.
How to match a URL with regex and survive the three edge cases that break most patterns: trailing punctuation, balanced parentheses, and scheme-less links.
Batch convert 50 images to WebP, AVIF, JPG, or PNG at once, entirely in your browser — no upload, no sign-up, and your files never leave your device.
Convert any date to a Unix timestamp in Bash, Python, JavaScript, and SQL with copy-paste one-liners — plus the timezone trap each language hides.
Learn how to convert JPG to PNG in your browser, why it never restores lost quality, and the three cases where converting actually helps instead of bloating files.
Sign a JWT in the browser with HS256 and the Web Crypto API — five lines of JavaScript, no library, no server. The 2026 walkthrough.