About this utility
How to use RRULE Recurrence Builder & Preview
Build a focused RFC-style recurrence rule and preview bounded UTC occurrences.
What to provide
Enter an ISO date-time with an explicit offset or Z.
- Paste, type, or drag and drop a supported text file into the input area.
- Choose the options that match your intended result.
- Select “Run tool” or press Ctrl/Command + Enter, then copy, download, or move the result back into the first input for another pass.
What the result means
Produces a bounded, inspectable rrule recurrence builder & preview result locally.
Privacy and safety
This utility is loaded as browser code and processes your input only in this tab. OmniCastConverter has no upload endpoint and never stores your content, filenames, tokens, or secrets. Generated markup and code are shown as inert text and are never executed.
Limitations
- This focused builder omits BYDAY, exception dates, floating time, and complete time-zone components.
Try the included example
Select “Load example” at any time to restore this tested sample.
2026-07-24T09:00:00Z