Reference
Five-field cron, in UTC
The cron helper explains minute, hour, day of month, month, and day of week. It does not install a job.
Blog
Notes on what the tools do, and on what they refuse to pretend.
Security
Why the JWT page does not verify tokens
Decoding a token shows you the header and payload. It does not prove who signed it, and the token stays in the browser.
Guides
Format JSON without uploading it
The formatter parses JSON in the page. Invalid input stops at the parser error, and the text never becomes an API request.