UUID Generator
Developer Utilities
Generate cryptographically random UUID v4 identifiers.
Open ToolBuild cron expressions visually and explain existing ones.
0 0 * * *
Runs at hour 0, minute 0 (00:00) every day.
A cron expression has five fields — minute, hour, day of month, month and day of week — each accepting a value, a list, a range or a step such as */15.
The builder writes the expression for you, and the explain mode turns an existing schedule into a sentence so you can confirm it before deploying it to a server or CI pipeline.
Developer Utilities
Generate cryptographically random UUID v4 identifiers.
Open ToolDeveloper Utilities
Test regular expressions with live matches and capture groups.
Open ToolDeveloper Utilities
Compare two texts line by line and highlight the changes.
Open ToolFormatters
Format, beautify and validate JSON with clear error messages.
Open Tool