Tutorials, deep-dives, and privacy-first thinking about developer tools.
Showing 1–12 of 13 posts
Apple touch icon generator that builds every iOS, iPadOS, and Safari pinned-tab size from one source — no upload, no sign-up, on-brand in 30 seconds.
Generate every Android mipmap density (mdpi to xxxhdpi) from one source PNG — no Android Studio, no upload, ready as a drop-in res/ folder in seconds.
Trim white margins from any PDF in your browser — no upload, no watermark, no sign-up. Here is exactly how PDF cropping works in 2026.
How to merge PDF files for free without uploads, watermarks, or sign-ups — and what's actually happening under the hood when iKit does it in 2026.
Generate QR codes for Wi-Fi networks, contact vCards, and URLs in seconds — covering payload formats, error correction, and design rules for reliable scans.
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 turns binary into text so it can travel through JSON, URLs, and headers. Learn to encode and decode Base64 with real browser, CLI, and code examples.
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.