Guides, walkthroughs and tool news. Every post is filed under the tool or topic it belongs to.
✏️ Latest scribble · October 29, 2026
Workflow choice, not loyalty test — plus the hybrid.
❓ Do digital charts work offline? ❓ What about student data privacy? ❓ Which is better for substitutes?
Read this postSep 20, 2026
A practical look at internet speed tests: what download, upload, ping, jitter, and packet loss measure, how Wi-Fi differs from Ethernet, and how to troubleshoot a slow connection.
Read postSep 20, 2026
If you use a computer every day, you probably perform dozens of tiny digital tasks that are too simple to justify installing…
Read postSep 17, 2026
Codepoint, name, block.
Read postSep 17, 2026
International domain names.
Read postSep 17, 2026
Normalize numbers.
Read postSep 17, 2026
Basic vehicle identification.
Read postSep 17, 2026
HMAC with secret and hash.
Read postSep 17, 2026
Confirms ISBN-10 and ISBN-13 checksums.
Read postSep 17, 2026
Check IBAN syntax and checksums per country.
Read post🔒 Privacy: the blog is just words on the site. No accounts, no tracking.
