Security and Inspectors for developer workflows.
Inspect tokens, patterns, hashes, and schedules. These tools run locally in your browser whenever possible.
When to use these tools
Inspector tools help developers understand values that are easy to misread at a glance, such as JWT claims, regular expression matches, hash digests, and cron schedules. These pages are for inspection and debugging; they do not verify trust, replace security review, or execute production code.
JWT Decoder
Decode JWT header and payload locally, including issued-at, not-before, and expiration status.
NewRegex Tester
Test JavaScript regular expressions, inspect matches, and highlight matched text locally.
NewHash Generator
Generate MD5, SHA-1, and SHA-256 hashes from local text input.
NewCron Parser
Parse five-field cron expressions and preview the next five local run times.