# IndieICS

> Inspect a calendar file locally to explain event times, recurrence, and unresolved timezones.

IndieICS is a free, one-input web utility for indie makers at indieics.com. It takes one text, for example BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//IndieICS//Example//EN
BEGIN:VEVENT
UID:demo@example.com
DTSTAMP:20260905T090000Z
DTSTART:20260908T100000Z
SUMMARY:Example meeting
END:VEVENT
END:VCALENDAR, and answers in about ten seconds. Every answer names its source next to it. No account, no card, no premium plan, no upgrade nag, no hidden paywall. Private lookup activity is never published. The site uses cookieless analytics to measure visits. Every page is static HTML, and each link below is that page as Markdown or plain text. Made by turushan, https://twitter.com/turushan.

## Pages

- [IndieICS](https://indieics.com/index.md): what the tool checks, what it takes, and what it promises
- [More tools](https://indieics.com/tools.md): the other tools by turushan, one line each
- [Notes](https://indieics.com/blog.md): the posts, newest first

## Notes

- [Why IndieICS exists](https://indieics.com/blog/why-indieics-exists.md): UTC, floating time, timezone definitions, and recurrence can explain a surprising calendar invite. IndieICS reads those fields locally.

## Policies

- [security.txt](https://indieics.com/.well-known/security.txt): how to report a vulnerability, in the RFC 9116 shape