Web Dev Helpers Tools

Some of the most consequential lines in a codebase are also the hardest to read: a cron schedule, a regular expression, an encoded query string. Each is short enough to look harmless and dense enough to hide a mistake until it runs in production. This category is for reading those lines back in plain terms before they ship.

Cron Expression Explainer & Builder turns a schedule such as */15 9-17 * * 1-5 into a sentence and the next ten run times, and warns when both day fields make cron fire on either. Regex Tester & Explainer, from Code & Dev, highlights every match and explains each token of a pattern, and URL Encoder / Decoder shows exactly what percent-encoding does to a URL or a single parameter value, in both directions. Chmod, semver and user-agent helpers are next.