Developer tool
Your files never leave your device
Check your Network tab and see
Work starts the moment you drop a file
No daily limit, no sign-up, no watermark
The default expects minute, hour, day of month, month, and day of week — the pattern common in crontab and many schedulers. Quartz six-field or AWS cron variants are not the default here; exotic syntax may fail to parse.
cronstrue turns the expression into a sentence. cron-parser v5 then walks the next five firing times from the parser's timezone context — typically your engine default, not a timezone you pick in the UI.
Not a GUI to click together schedules, not a deployment tool, and not a guarantee your production scheduler uses identical DST rules. Always confirm against the system that will run the job.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
Convert Unix epoch timestamps to human-readable dates, and vice versa.
Decode JSON Web Tokens (JWT) safely to view header and payload without sending secrets to any server.
Format, beautify, and strictly align your messy SQL queries securely.
Format, validate, prettify and beautify your JSON data instantly.
Test, visualize, and debug Regular Expressions instantly in your browser.
Generate valid universally unique identifiers (UUIDs/GUIDs) instantly.
