How to Format a USB Drive (and Which Filesystem to Pick)
Formatting takes thirty seconds; the dropdown decides whether the stick does the job. We built each filesystem as a real...
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How to Remove the Background from an Image
There are two methods and almost every article pretends there is one. A flood fill removes what matches the background a...
Does Re-Saving a JPEG Make It Worse?
Re-saving a JPEG is nearly lossless at exactly one quality — the one it was already saved at — and roughly forty times c...
Why "Random" Is Almost Never Random — and What a Fairness Test Cannot See
We fed the same rejection-sampling helper a cryptographic source and a 1960s textbook generator, 600,000 draws each. The...
Which Image Format, and Why Your Photos Are Too Big
One of our own hero photos was 198,372 bytes. It is 59,766 now — same photograph, same dimensions; we finally compressed...
UUID v4 vs v7 in 2026: v1 Was Never the Sortable One
RFC 9562 replaced RFC 4122 in May 2024, and the advice most codebases still follow did not update with it. UUID v1 is ti...
Decoding a JWT Is Not Verifying It
A decoder shows you the claims; it does not tell you whether to believe them. RFC 7519 §7.2 lists ten validation steps a...
Encoding Is Not Encryption: Base64, Percent-Encoding and the Confusion That Leaks Data
The RFC that defines Base64 says in its own Security Considerations that base encoding "visually hides" a password but "...
Which Hash for What: MD5, SHA-256, and the Password Mistake
"MD5 is broken, so hash your passwords with SHA-256 instead" gets both halves wrong, in opposite directions. What broke...
Self-Host Firecrawl with Docker: Scrape the Web into LLM-Ready Markdown (2026)
We cloned Firecrawl v2.11.0, built its seven-service Docker stack, and scraped our own homepage into clean markdown — no...
Self-Host n8n with Docker: From Zero to Your First Webhook (2026)
One container, one volume, one real webhook: we self-hosted n8n 2.30.8 with Docker on macOS and captured every command,...
How to Set Up Hermes Agent on a Mac (2026)
Executed walkthrough of installing Hermes Agent v0.18.2 on macOS: the official script, the PATH gotcha, doctor checks, a...
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