Parse cron expressions into human-readable descriptions. Includes common presets for quick reference. Presets plus plain-English schedules prevent 3am surprises — local parsing, free, no signup.
Content reviewed October 2026 · About Toolzum
Parse User-Agent strings into browser, OS, device, and bot verdicts. Identify crawlers vs customers in logs — local parsing, free, no signup.
Validate cron schedules and preview next run times — catch the Sunday-vs-7 bug before production. Verify 0 2 * * * runs 2am daily — local parsing, free, no signup.
Parse curl commands into method, URL, headers, and body parts for debugging. Dissect a failing Stripe call field by field — local parsing, free, no signup.
Parse SQL INSERT statements back into CSV rows — quoted strings unescaped, NULLs emptied, multi-statement appends. Round-trip database dumps back to spreadsheets — local parsing, free, no signup.
Convert between plain text and binary in both directions — encode text into its base-2 representation or decode binary strings back to readable text, byte by byte. Files are converted locally in your browser — nothing is uploaded.
Standard 5-field cron format (minute, hour, day-of-month, month, day-of-week). Supports wildcards, ranges, lists, and steps.
Ready-to-use presets for hourly, daily, weekly, monthly, and yearly schedules. Common intervals like every 5 minutes or every Monday are included.
Yes. Each cron field is parsed and displayed with its meaning. You can see exactly what '0 2 * * 1-5' means (weekdays at 2 AM).
Yes. Invalid expressions are flagged with error messages. The tool checks for valid ranges, correct field count, and proper syntax.
Yes. All parsing happens in your browser. No cron data is sent to any server.
Minute 0-59, hour 0-23, day 1-31, month 1-12, weekday 0-7 (7 is normalized to Sunday 0). Steps, ranges and lists validate against those bounds, and the tool scans minute-by-minute up to 525600 iterations (about a year) to list the next 3 runs.