Tutorials, deep-dives, and privacy-first thinking about developer tools.
Showing 49–60 of 61 posts
A technical look at how every iKit tool processes your files locally — WebAssembly, OffscreenCanvas, Web Crypto, and the patterns that replace server round-trips.
iKit is 14 free online tools — none of them upload your files. Here's the story of why I built it that way, and what it means in practice for the people using it.
Generate QR codes for Wi-Fi networks, contact vCards, and URLs in seconds — covering payload formats, error correction, and design rules for reliable scans.
Three ways to format ugly JSON — IDE plugins, CLI tools like jq, and privacy-first browser formatters — compared on speed, privacy, and ergonomics.
Verify any download with MD5 or SHA-256 in your terminal, on Windows, or fully in your browser — and learn when MD5 is dangerously weak.
Generate a UUID v4 in one line across browser, Node, Python, and CLI — and learn the three cases where UUID v4 is the wrong identifier to reach for.
Base64 explained with 10 working examples — encode and decode in the browser, terminal, JavaScript, Python, and JWTs. Includes URL-safe variant and the `==` padding rule.
Strong passwords don't need to be random gibberish. Learn four memorable patterns that meet NIST rules — plus when to let a generator do the work.
Parse MySQL, PostgreSQL, or SQLite dumps and export them to .xlsx entirely in your browser — no server, no account, no size cap. Full walkthrough.
Remove image backgrounds for free in your browser — no Photoshop install, no uploads, no signup. Works on photos, product shots, logos, and portraits.
Batch-compress JPG, PNG, and WebP images in your browser and download them as a single ZIP — no account, no upload, no quality loss.
Shrink PNG files by 60-80% without any visible quality loss using free browser-based tools — no Photoshop install, no uploads, no account required.