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Security·24 сентября 2026 г.

Base64 is not encryption: matching the tool to the encoding job

Base64, URL encoding, HTML entities, and hashing get mixed up constantly. Each one has a narrow job. Here is what happens when you use the wrong one, and how to check any of them without piping secrets through a stranger's web server.

Data Conversion·23 сентября 2026 г.

UUIDs: which version to pick and when v7 actually matters

v4 is fine until you need sortable IDs or smaller indexes. A plain guide to UUID versions, where each one fits, and why v7 is the one worth switching to.

Security·23 сентября 2026 г.

Decoding JWTs without sending them anywhere they should not go

A JWT is base64, not encryption. Where to decode one safely, which claims to actually check, and why pasting production tokens into random websites is a bad habit.

Productivity·23 сентября 2026 г.

Cron expressions: read one in a minute, write one without guessing

Five fields, a lot of ways to be wrong. How to read a cron expression at a glance, the mistakes that silently fire at the wrong time, and a way to check before you commit.

Text Processing·23 сентября 2026 г.

Clean Scraped Text Before It Breaks Your Script

Copy-pasted text carries invisible baggage: non-breaking spaces, zero-width characters, CRLF line endings, duplicated lines. A cleanup pass prevents the bugs.

Security·23 сентября 2026 г.

Password Rules That Actually Help

Most password requirements add friction without adding strength. What length, character sets, and checkers really do, and how to test your own passwords.

Text Processing·23 сентября 2026 г.

Test Your Regex Before It Ships

A regex that works on your test string can still fail on the one your user pastes in. How to pressure-test patterns before they land in production.

Productivity·22 сентября 2026 г.

Timezone Math for Remote Teams Without the Headache

A standup at 10:00 in Riga is midnight in San Francisco. Timezone mistakes are quiet: they just bleed meetings and deadlines until someone starts doing the conversion properly. Here is how to stop doing it from memory.

Security·22 сентября 2026 г.

Verify Any Download in Under a Minute

Every serious download page publishes a checksum. Comparing it takes less time than one failed install, and it catches corrupted or tampered files before they cost you an afternoon.