Calendar File Desk
Inspect and merge ICS files locally. Audit recurring events, exceptions and timezones, select event versions, and export a calendar plus CSV snapshots.
How we build a check
This workbench processes supported inputs locally. We test calculations, file structure and generated artifacts using independent readers or known fixtures where available. The example runs the same processing path as a supplied input; it does not stand in for checking your own result.
Editorial responsibility
KitForma maintains this tool and its guides. The source notes on the tool page link to the supporting documentation. We do not claim affiliation with the referenced hardware manufacturers or platforms. Review date: 2026-10-18.
Limits and updates
8 UTF-8 ICS files · 10 MiB combined · 2,000 event components · 64 KiB unfolded property · 366-date preview window · 5,000 output occurrences / 50,000 iterator steps · one-minute worker limit. Event-only ICS export. Embedded timezone conversion: 1900–2100 with yearly observance rules. DAILY/WEEKLY/MONTHLY/YEARLY expansion; unsupported rules stay in ICS with clear snapshot warnings. If a specification changes or a result appears incorrect, send the relevant source URL and a non-sensitive reproduction to kitforma@outlook.com.
Open-source components
The tools use self-hosted open-source components appropriate to each format, including PDF.js, pdf-lib, fflate, SheetJS, MediaInfo by MediaArea.net SARL and others. Component versions and licenses. MediaInfo license · fflate license.