Cron Expression Parser
Translate a cron expression into plain English and see the next run times, so you can verify a schedule before it ships.
Curated security tools and interactive browser utilities for learning, research, and responsible testing.
7 tools
Translate a cron expression into plain English and see the next run times, so you can verify a schedule before it ships.
Convert a Unix epoch (seconds or milliseconds) to human-readable UTC/ISO time, and convert a date back to an epoch — both directions in one tool.
Validate, pretty-print, and minify JSON in your browser, with clear parse errors, configurable indentation, and a minified-size readout.
Count characters, words, and lines in any text instantly, with and without spaces.
Test a regular expression against sample text and get a static ReDoS (catastrophic backtracking) safety review.
Convert text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, Title Case, and more.
Compare two blocks of text line by line and see exactly what was added, removed, or unchanged.