- httpcheatsheetapi
HTTP status codes: the only reference you'll need
Every HTTP status code with plain-English meaning — when to send which, when to care about the distinction, and the codes you can usually ignore.
3 min readRead - iso8601datescheatsheet
ISO 8601 date format cheatsheet: every variant with examples
The only date format you should be storing and serialising in 2026. Every shape, the pitfalls, and the quick reference for parsing.
2 min readRead - croncheatsheetscheduling
Cron schedule cheatsheet: 50 patterns with explanations
Copy-paste cron expressions for every common cadence — every minute, every night, every weekday, every quarter, business hours only, and 45 more.
5 min readRead - regexcheatsheetpatterns
Complete regex cheatsheet (with copy-paste patterns that actually work)
Every metacharacter, every flag, and 30 real-world patterns for email, IP, date, URL, slug, credit-card and more. All testable in the browser.
8 min readRead