Guides

These notes explain the ideas behind the tools. Start with the evening pass if you want the point of the site. The rest stay with time, slugs, encoding, and JSON. They are not product manuals for old desktop software.

What an evening pass is
Why this desk exists, and how count, clean, convert, and check fit together.
What a Unix timestamp is
Seconds from the epoch, milliseconds in JavaScript, and why 0 is 1970-01-01 UTC.
URL slugs and SEO
What a slug is for, what ASCII folding does, and what a slug cannot promise.
Base64 is not encryption
Why a readable alphabet is still just encoding, and when decode should fail.
Local time versus UTC
The same instant, two labels, and how this site’s converter marks the clock.
What counts as valid JSON
Double quotes, no comments, no trailing commas, and what format does not change.