minute hour day-of-month month day-of-week
Cron Expression Parser decodes standard 5-field crontab expressions (minute, hour, day-of-month, month, day-of-week) into a plain-English sentence and a field-by-field breakdown. Paste something like "*/15 9-17 * * 1-5" and immediately see that it fires every 15th minute past hours 9 through 17, Monday through Friday — no more counting asterisks or second-guessing whether the third field is the day or the month.
Beyond translation, the tool computes the next five run times in both your local timezone and UTC. This matters more than it sounds: a huge class of production incidents comes from cron jobs that were scheduled against the wrong timezone or that silently never fire because day-of-month and day-of-week interact in the OR-semantics way Vixie cron defines. Seeing concrete upcoming timestamps is the fastest sanity check before you commit a schedule to a crontab, a Kubernetes CronJob, a GitHub Actions workflow, or an AWS EventBridge rule.
Everything runs 100% client-side in your browser — the expressions you paste never touch a server, which means it is safe to use with schedules from internal infrastructure, CI/CD pipelines, or anything else you would rather not paste into a random website. The parser supports the full standard syntax: wildcards (*), lists (1,15,30), ranges (1-5), step values (*/15, 1-10/2), and named months and weekdays (JAN-DEC, SUN-SAT).
Type or paste a standard 5-field expression such as "30 */2 * * 1" into the input, or click a preset like "Weekdays 9am" to start from a common schedule.
Click Parse to validate the syntax. Invalid values, reversed ranges, and out-of-range numbers are reported with a specific error message so you know exactly which field to fix.
Read the human-readable description, then check the field table to confirm each of the five fields expands to the values you expect — especially day-of-month vs day-of-week interactions.
Inspect the next 5 scheduled occurrences shown in both local time and UTC. If they match your intent, copy the expression to your clipboard and drop it into your crontab or scheduler config.
Turns cryptic crontab syntax into a readable sentence like "At minute 30 past every 2nd hour, on Monday"
Table showing each of the 5 fields, its raw expression, and the expanded values it matches
Concrete upcoming timestamps in both local time and UTC — the fastest way to catch timezone mistakes
Supports wildcards, lists, ranges, step values, and named months/weekdays (JAN-DEC, SUN-SAT)
Calculate the exact time between two dates: years, months, days, and business days
Convert between Unix timestamps and human-readable dates
Generate random UUIDs (Universally Unique Identifiers)
Format, validate, and minify JSON data
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